443 Area CodeBaltimore, MD
Area code 443 covers Baltimore and nearby communities in Maryland, in the Eastern Time (ET) zone, home to about 3,212,271 people across 208 cities. It was added in 1997 as an overlay of 410, so the same region uses several codes and every local call needs all ten digits.
Overview
- Major City
- Baltimore
- State
- Maryland (MD)
- Timezone
- Eastern Time (ET)
- Current Time
- –:––
- Overlay
- Yes – shares area with 410, 667
Overview of the 443 Area Code
What is the 443 area code?
The 443 area code serves Baltimore, Maryland, alongside other established area codes. When you see a 443 number, it indicates a local number within this geographic area.
Why was area code 443 created?
Area code 443 went into service on June 1, 1997, as an overlay of 410. An overlay adds a second code to the same territory instead of splitting it: existing 410 numbers kept their digits, new lines began receiving 443 numbers, and local calls in the region require all ten digits. The same territory also carries 667.
Geographic Coverage of the 443 Area Code
The 443 area code serves Baltimore and surrounding areas in Maryland. It operates within the Eastern Time (ET) time zone. It complements the coverage of area codes 410 and 667. This area code covers several key cities, including:
- Baltimore
- Columbia
- Glen Burnie
- Ellicott City
- Dundalk
- Towson
Got a call from a 443 number? It came from Baltimore, MD. Since 443 overlays with 410 and 667, every local call in the region needs all ten digits to land on the right line. Of the listed cities' population, Baltimore accounts for about 23.0%; the rest is split across 207 smaller cities.
Baltimore Area Codes Overview
Baltimore is served by multiple area codes, reflecting its telecommunications needs. The 443 area code operates alongside 410, 667. Here are the area codes serving this region:
The introduction of the 443 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 443 cover?
| City | State | Population | Population in 443 | % of listed-city population | % of City |
|---|---|---|---|---|---|
| Baltimore | MD | 568,271 | 568,271 | 23.0% | 100.0% |
| Columbia | MD | 99,615 | 88,218 | 4.0% | 88.6% |
| Glen Burnie | MD | 67,639 | 67,639 | 2.7% | 100.0% |
| Ellicott City | MD | 65,834 | 65,834 | 2.7% | 100.0% |
| Dundalk | MD | 63,597 | 63,597 | 2.6% | 100.0% |
| Towson | MD | 55,197 | 55,197 | 2.2% | 100.0% |
| Bel Air South | MD | 47,709 | 47,709 | 1.9% | 100.0% |
| Severn | MD | 44,231 | 44,231 | 1.8% | 100.0% |
| Catonsville | MD | 41,567 | 41,567 | 1.7% | 100.0% |
| Annapolis | MD | 40,689 | 40,689 | 1.7% | 100.0% |
| Essex | MD | 39,262 | 39,262 | 1.6% | 100.0% |
| Woodlawn | MD | 37,879 | 37,879 | 1.5% | 100.0% |
| Severna Park | MD | 37,634 | 37,634 | 1.5% | 100.0% |
| Odenton | MD | 37,132 | 37,132 | 1.5% | 100.0% |
| Salisbury | MD | 33,616 | 33,616 | 1.4% | 100.0% |
| Randallstown | MD | 32,430 | 32,430 | 1.3% | 100.0% |
| Pikesville | MD | 30,764 | 30,764 | 1.3% | 100.0% |
| Parkville | MD | 30,734 | 30,734 | 1.3% | 100.0% |
| Owings Mills | MD | 30,622 | 30,622 | 1.2% | 100.0% |
| Bel Air North | MD | 30,568 | 30,568 | 1.2% | 100.0% |
| Eldersburg | MD | 30,531 | 30,531 | 1.2% | 100.0% |
| Carney | MD | 29,941 | 29,941 | 1.2% | 100.0% |
| Milford Mill | MD | 29,042 | 29,042 | 1.2% | 100.0% |
| Perry Hall | MD | 28,474 | 28,474 | 1.2% | 100.0% |
| Crofton | MD | 27,348 | 27,348 | 1.1% | 100.0% |
| Reisterstown | MD | 25,968 | 25,968 | 1.1% | 100.0% |
| Edgewood | MD | 25,562 | 25,562 | 1.0% | 100.0% |
| Lochearn | MD | 25,333 | 25,333 | 1.0% | 100.0% |
| Middle River | MD | 25,191 | 25,191 | 1.0% | 100.0% |
| Pasadena | MD | 24,287 | 24,287 | 1.0% | 100.0% |
| Ilchester | MD | 23,476 | 23,476 | 1.0% | 100.0% |
| Arnold | MD | 23,106 | 19,787 | 0.9% | 85.6% |
| Cockeysville | MD | 20,776 | 20,776 | 0.9% | 100.0% |
| Westminster | MD | 20,662 | 20,662 | 0.8% | 100.0% |
| Arbutus | MD | 20,483 | 20,483 | 0.8% | 100.0% |
| Lake Shore | MD | 19,477 | 19,477 | 0.8% | 100.0% |
| Rosedale | MD | 19,257 | 19,257 | 0.8% | 100.0% |
| Aberdeen | MD | 18,451 | 18,451 | 0.8% | 100.0% |
| Easton | MD | 17,381 | 17,381 | 0.7% | 100.0% |
| Ferndale | MD | 16,746 | 16,746 | 0.7% | 100.0% |
| Elkton | MD | 15,977 | 15,977 | 0.7% | 100.0% |
| Parole | MD | 15,922 | 15,922 | 0.7% | 100.0% |
| Elkridge | MD | 15,593 | 15,593 | 0.6% | 100.0% |
| Havre de Grace | MD | 15,222 | 15,222 | 0.6% | 100.0% |
| Rossville | MD | 15,147 | 15,147 | 0.6% | 100.0% |
| Brooklyn Park | MD | 14,373 | 14,373 | 0.6% | 100.0% |
| Cambridge | MD | 13,262 | 13,262 | 0.5% | 100.0% |
| Riviera Beach | MD | 12,677 | 12,677 | 0.5% | 100.0% |
| Joppatowne | MD | 12,616 | 12,616 | 0.5% | 100.0% |
| Overlea | MD | 12,275 | 12,275 | 0.5% | 100.0% |
| Ocean Pines | MD | 11,710 | 11,710 | 0.5% | 100.0% |
| Mays Chapel | MD | 11,420 | 11,420 | 0.5% | 100.0% |
| Annapolis Neck | MD | 10,950 | 10,950 | 0.5% | 100.0% |
| Chesapeake Ranch Estates | MD | 10,519 | 10,519 | 0.4% | 100.0% |
| Bel Air | MD | 10,395 | 10,395 | 0.4% | 100.0% |
| Linthicum | MD | 10,324 | 10,324 | 0.4% | 100.0% |
| Timonium | MD | 9,925 | 9,925 | 0.4% | 100.0% |
| White Marsh | MD | 9,513 | 9,513 | 0.4% | 100.0% |
| Fort Meade | MD | 9,327 | 9,327 | 0.4% | 100.0% |
| Edgewater | MD | 9,023 | 9,023 | 0.4% | 100.0% |
| Fallston | MD | 8,958 | 8,958 | 0.4% | 100.0% |
| Garrison | MD | 8,823 | 8,823 | 0.4% | 100.0% |
| Cape St. Claire | MD | 8,747 | 8,747 | 0.4% | 100.0% |
| Edgemere | MD | 8,669 | 8,669 | 0.4% | 100.0% |
| Lansdowne | MD | 8,409 | 8,409 | 0.3% | 100.0% |
| Mayo | MD | 8,298 | 8,298 | 0.3% | 100.0% |
| Taneytown | MD | 8,293 | 8,293 | 0.3% | 100.0% |
| Jessup | MD | 7,137 | 7,137 | 0.3% | 100.0% |
| Baltimore Highlands | MD | 7,019 | 7,019 | 0.3% | 100.0% |
| Ocean City | MD | 6,884 | 1,836 | 0.3% | 26.7% |
| Stevensville | MD | 6,803 | 6,803 | 0.3% | 100.0% |
| Bowleys Quarters | MD | 6,755 | 6,755 | 0.3% | 100.0% |
| Lutherville | MD | 6,504 | 6,504 | 0.3% | 100.0% |
| Chesapeake Beach | MD | 6,504 | 6,504 | 0.3% | 100.0% |
| Riverside | MD | 6,425 | 6,425 | 0.3% | 100.0% |
| Hampstead | MD | 6,288 | 6,288 | 0.3% | 100.0% |
| Fruitland | MD | 5,973 | 5,973 | 0.3% | 100.0% |
| Shady Side | MD | 5,803 | 5,803 | 0.2% | 100.0% |
| Chestertown | MD | 5,702 | 5,702 | 0.2% | 100.0% |
| Manchester | MD | 5,440 | 5,440 | 0.2% | 100.0% |
| Berlin | MD | 5,349 | 5,349 | 0.2% | 100.0% |
| Hampton | MD | 5,052 | 5,052 | 0.2% | 100.0% |
| Denton | MD | 5,049 | 5,049 | 0.2% | 100.0% |
| Deale | MD | 4,945 | 4,945 | 0.2% | 100.0% |
| Naval Academy | MD | 4,802 | 4,802 | 0.2% | 100.0% |
| Centreville | MD | 4,771 | 4,771 | 0.2% | 100.0% |
| Delmar | MD | 4,748 | 4,748 | 0.2% | 100.0% |
| Sykesville | MD | 4,622 | 4,622 | 0.2% | 100.0% |
| Perryville | MD | 4,510 | 4,510 | 0.2% | 100.0% |
| Pocomoke City | MD | 4,426 | 4,426 | 0.2% | 100.0% |
| West Ocean City | MD | 4,375 | 4,375 | 0.2% | 100.0% |
| Kingsville | MD | 4,318 | 4,318 | 0.2% | 100.0% |
| North East | MD | 4,191 | 4,191 | 0.2% | 100.0% |
| Chester | MD | 4,167 | 0 | 0.2% | 0.0% |
| Riva | MD | 4,076 | 4,076 | 0.2% | 100.0% |
| Princess Anne | MD | 3,667 | 3,667 | 0.2% | 100.0% |
| Grasonville | MD | 3,425 | 3,425 | 0.1% | 100.0% |
| Pleasant Hills | MD | 3,379 | 3,379 | 0.1% | 100.0% |
| Huntingtown | MD | 3,311 | 3,311 | 0.1% | 100.0% |
| Jarrettsville | MD | 2,916 | 2,916 | 0.1% | 100.0% |
| Federalsburg | MD | 2,871 | 2,871 | 0.1% | 100.0% |
| Gambrills | MD | 2,800 | 2,800 | 0.1% | 100.0% |
| Rising Sun | MD | 2,777 | 2,777 | 0.1% | 100.0% |
| Drum Point | MD | 2,731 | 2,731 | 0.1% | 100.0% |
| Herald Harbor | MD | 2,603 | 2,603 | 0.1% | 100.0% |
| Prince Frederick | MD | 2,538 | 2,538 | 0.1% | 100.0% |
| Crisfield | MD | 2,531 | 2,531 | 0.1% | 100.0% |
| Solomons | MD | 2,368 | 2,368 | 0.1% | 100.0% |
| Perryman | MD | 2,342 | 2,342 | 0.1% | 100.0% |
| Snow Hill | MD | 2,243 | 2,243 | 0.1% | 100.0% |
| North Beach | MD | 2,178 | 2,178 | 0.1% | 100.0% |
| Owings | MD | 2,149 | 2,149 | 0.1% | 100.0% |
| Aberdeen Proving Ground | MD | 2,093 | 2,093 | 0.1% | 100.0% |
| Hurlock | MD | 2,093 | 2,093 | 0.1% | 100.0% |
| Greensboro | MD | 1,969 | 1,969 | 0.1% | 100.0% |
| Arden on the Severn | MD | 1,953 | 1,953 | 0.1% | 100.0% |
| Lusby | MD | 1,835 | 1,835 | 0.1% | 100.0% |
| Long Beach | MD | 1,821 | 1,821 | 0.1% | 100.0% |
| New Windsor | MD | 1,758 | 1,758 | 0.1% | 100.0% |
| Crownsville | MD | 1,757 | 1,757 | 0.1% | 100.0% |
| Kingstown | MD | 1,733 | 1,733 | 0.1% | 100.0% |
| Pittsville | MD | 1,660 | 1,660 | 0.1% | 100.0% |
| Ridgely | MD | 1,646 | 1,646 | 0.1% | 100.0% |
| Charlestown | MD | 1,538 | 1,538 | 0.1% | 100.0% |
| Trappe | MD | 1,472 | 1,472 | 0.1% | 100.0% |
| Algonquin | MD | 1,241 | 1,241 | 0.1% | 100.0% |
| Rock Hall | MD | 1,200 | 1,200 | 0.1% | 100.0% |
| Hebron | MD | 1,114 | 1,114 | 0.1% | 100.0% |
| St. Michaels | MD | 1,073 | 1,073 | 0.1% | 100.0% |
| Willards | MD | 1,005 | 1,005 | 0.0% | 100.0% |
| Union Bridge | MD | 946 | 946 | 0.0% | 100.0% |
| Church Hill | MD | 831 | 831 | 0.0% | 100.0% |
| Eden | MD | 823 | 823 | 0.0% | 100.0% |
| Calvert Beach | MD | 808 | 808 | 0.0% | 100.0% |
| Tilghman Island | MD | 784 | 784 | 0.0% | 100.0% |
| Mount Vernon | MD | 779 | 779 | 0.0% | 100.0% |
| Chesapeake City | MD | 745 | 745 | 0.0% | 100.0% |
| St. Leonard | MD | 742 | 742 | 0.0% | 100.0% |
| Queenstown | MD | 737 | 737 | 0.0% | 100.0% |
| Sharptown | MD | 711 | 711 | 0.0% | 100.0% |
| Pylesville | MD | 693 | 693 | 0.0% | 100.0% |
| Cecilton | MD | 688 | 688 | 0.0% | 100.0% |
| Preston | MD | 688 | 688 | 0.0% | 100.0% |
| Galesville | MD | 684 | 684 | 0.0% | 100.0% |
| Port Deposit | MD | 625 | 625 | 0.0% | 100.0% |
| Oxford | MD | 601 | 601 | 0.0% | 100.0% |
| Kent Narrows | MD | 567 | 567 | 0.0% | 100.0% |
| Cordova | MD | 562 | 562 | 0.0% | 100.0% |
| Millington | MD | 541 | 541 | 0.0% | 100.0% |
| Galena | MD | 538 | 538 | 0.0% | 100.0% |
| Bishopville | MD | 531 | 531 | 0.0% | 100.0% |
| Sudlersville | MD | 516 | 516 | 0.0% | 100.0% |
| Butlertown | MD | 505 | 505 | 0.0% | 100.0% |
| Fairlee | MD | 490 | 490 | 0.0% | 100.0% |
| Deal Island | MD | 471 | 471 | 0.0% | 100.0% |
| Secretary | MD | 469 | 469 | 0.0% | 100.0% |
| Fairmount | MD | 457 | 457 | 0.0% | 100.0% |
| West Pocomoke | MD | 454 | 454 | 0.0% | 100.0% |
| Friendship | MD | 447 | 447 | 0.0% | 100.0% |
| Darlington | MD | 409 | 409 | 0.0% | 100.0% |
| East New Market | MD | 407 | 407 | 0.0% | 100.0% |
| Broomes Island | MD | 405 | 0 | 0.0% | 0.0% |
| Mardela Springs | MD | 354 | 354 | 0.0% | 100.0% |
| Chance | MD | 353 | 353 | 0.0% | 100.0% |
| Parsonsburg | MD | 339 | 339 | 0.0% | 100.0% |
| Newark | MD | 336 | 336 | 0.0% | 100.0% |
| Tolchester | MD | 329 | 329 | 0.0% | 100.0% |
| Betterton | MD | 283 | 283 | 0.0% | 100.0% |
| Smith Island | MD | 276 | 276 | 0.0% | 100.0% |
| Vienna | MD | 275 | 275 | 0.0% | 100.0% |
| Worton | MD | 249 | 249 | 0.0% | 100.0% |
| Tyaskin | MD | 236 | 236 | 0.0% | 100.0% |
| Nanticoke | MD | 225 | 225 | 0.0% | 100.0% |
| Goldsboro | MD | 216 | 216 | 0.0% | 100.0% |
| Allen | MD | 210 | 210 | 0.0% | 100.0% |
| Madison | MD | 204 | 204 | 0.0% | 100.0% |
| Bivalve | MD | 201 | 201 | 0.0% | 100.0% |
| Kennedyville | MD | 199 | 199 | 0.0% | 100.0% |
| Queen Anne | MD | 192 | 192 | 0.0% | 100.0% |
| Powellville | MD | 189 | 189 | 0.0% | 100.0% |
| Jesterville | MD | 188 | 188 | 0.0% | 100.0% |
| Barclay | MD | 181 | 181 | 0.0% | 100.0% |
| Marydel | MD | 178 | 178 | 0.0% | 100.0% |
| Taylors Island | MD | 173 | 173 | 0.0% | 100.0% |
| Edesville | MD | 169 | 169 | 0.0% | 100.0% |
| Dames Quarter | MD | 167 | 167 | 0.0% | 100.0% |
| Fishing Creek | MD | 163 | 163 | 0.0% | 100.0% |
| Henderson | MD | 161 | 161 | 0.0% | 100.0% |
| Williston | MD | 155 | 155 | 0.0% | 100.0% |
| Whaleyville | MD | 149 | 149 | 0.0% | 100.0% |
| Girdletree | MD | 149 | 149 | 0.0% | 100.0% |
| Georgetown | MD | 143 | 143 | 0.0% | 100.0% |
| Hillsboro | MD | 135 | 135 | 0.0% | 100.0% |
| Quantico | MD | 133 | 133 | 0.0% | 100.0% |
| Choptank | MD | 129 | 129 | 0.0% | 100.0% |
| Galestown | MD | 115 | 115 | 0.0% | 100.0% |
| Templeville | MD | 114 | 114 | 0.0% | 100.0% |
| Highland Beach | MD | 107 | 107 | 0.0% | 100.0% |
| Church Creek | MD | 105 | 105 | 0.0% | 100.0% |
| Nanticoke Acres | MD | 103 | 103 | 0.0% | 100.0% |
| Frenchtown-Rumbly | MD | 100 | 100 | 0.0% | 100.0% |
| Stockton | MD | 92 | 92 | 0.0% | 100.0% |
| Elliott | MD | 52 | 52 | 0.0% | 100.0% |
| West Denton | MD | 52 | 52 | 0.0% | 100.0% |
| Eldorado | MD | 46 | 46 | 0.0% | 100.0% |
| Brookview | MD | 46 | 46 | 0.0% | 100.0% |
| Whitehaven | MD | 43 | 43 | 0.0% | 100.0% |
| Waterview | MD | 40 | 40 | 0.0% | 100.0% |
City population is shown in full. The share of each city inside 443 is measured from Census tract centroids, not estimated from a rate-center match – so a city split between two codes appears on both, at the fraction each one actually holds. The “% of listed-city population” column uses the full populations of the cities listed here.
What counties does area code 443 cover?
3,212,271 residents across 17 counties, counted inside the 443 boundary — a county split between codes contributes only its part.
| County | State | Population in 443 | % of area-code footprint | % of County |
|---|---|---|---|---|
| Baltimore County | MD | 854,535 | 27% | 100% |
| Baltimore city | MD | 585,708 | 18% | 100% |
| Anne Arundel County | MD | 565,600 | 18% | 96% |
| Harford County | MD | 260,924 | 8% | 100% |
| Howard County | MD | 242,403 | 8% | 73% |
| Carroll County | MD | 162,109 | 5% | 94% |
| Cecil County | MD | 103,725 | 3% | 100% |
| Wicomico County | MD | 103,588 | 3% | 100% |
| Calvert County | MD | 92,783 | 3% | 100% |
| Worcester County | MD | 47,387 | 1% | 90% |
| Queen Anne's County | MD | 45,164 | 1% | 91% |
| Talbot County | MD | 35,680 | 1% | 95% |
| Caroline County | MD | 33,293 | 1% | 100% |
| Dorchester County | MD | 32,531 | 1% | 100% |
| Somerset County | MD | 24,620 | 1% | 100% |
| Kent County | MD | 19,198 | 1% | 100% |
| Frederick County | MD | 3,023 | 0% | 1% |
Sources: City populations – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). State populations – the same program, Vintage 2025 (CO-EST2025-ALLDATA). Area-code footprint and county populations – 2020 Census Centers of Population, mapped against NANP area code boundaries. The share of each city inside a code is measured the same way, against Census place boundaries from the Census Bureau's TIGERweb service. Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 443 been reported for unwanted calls?
Yes – 1,516 unwanted-call complaints were reported to the FTC for numbers showing a 443 area code (May 29 – Aug 14, 2026).
- 56% robocalls
- ↑ 25% vs prior period
Most-reported subjects
- Other39%587
- Dropped call or no message16%249
- Reducing your debt (credit cards, mortgage, student loans)16%248
Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-08-17.
Which prefixes and exchanges belong to area code 443?
78% assigned to a telco
- 66% Landline
- 34% Wireless
- 0% Unknown
of 783 | ||
| Prefix | Usage | Carrier |
|---|---|---|
| (443)200- | Landline | Mcimetro Access Transmission Services |
| (443)201- | Wireless | New Cingular Wireless Pcs |
| (443)202- | Wireless | Verizon Wireless |
| (443)203- | Landline | Verizon Maryland |
| (443)204- | Wireless | New Cingular Wireless Pcs |
| (443)205- | Wireless | Sprint Spectrum |
| (443)206- | Wireless | Verizon Wireless |
| (443)207- | Landline | Omnipoint Communications Enterprises |
| (443)208- | Wireless | Sprint Spectrum |
| (443)209- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)210- | Wireless | Sprint Spectrum |
| (443)212- | Landline | Us Lec Of Maryland |
| (443)213- | Landline | Verizon Maryland |
| (443)214- | Wireless | New Cingular Wireless Pcs |
| (443)215- | Landline | Core Communications |
| (443)216- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)217- | Landline | Core Communications |
| (443)218- | Landline | Global Crossing Local Services |
| (443)219- | Landline | Level 3 Communications |
| (443)220- | Landline | Verizon Maryland |
| (443)221- | Landline | Level 3 Communications |
| (443)222- | Landline | Xo Maryland |
| (443)223- | Wireless | Verizon Wireless |
| (443)224- | Landline | Mcimetro Access Transmission Services |
| (443)225- | Wireless | Sprint Spectrum |
| (443)226- | Wireless | Sprint Spectrum |
| (443)227- | Landline | Ctc Communications |
| (443)228- | Landline | Us Lec Of Maryland |
| (443)229- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)230- | Landline | Ctc Communications |
| (443)231- | Landline | Teleport Communications America |
| (443)232- | Landline | Core Communications |
| (443)233- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)234- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)235- | Wireless | Verizon Wireless |
| (443)236- | Landline | Core Communications |
| (443)237- | Landline | Core Communications |
| (443)238- | Landline | Ctc Communications |
| (443)239- | Wireless | New Cingular Wireless Pcs |
| (443)240- | Wireless | New Cingular Wireless Pcs |
| (443)241- | Landline | Onvoy |
| (443)242- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)243- | Wireless | Verizon Wireless |
| (443)244- | Landline | Level 3 Communications |
| (443)245- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)246- | Landline | Core Communications |
| (443)247- | Landline | Ctc Communications |
| (443)248- | Wireless | Verizon Wireless |
| (443)249- | Landline | Verizon Maryland |
| (443)250- | Wireless | Sprint Spectrum |
| (443)251- | Landline | Local Access |
| (443)252- | Wireless | Verizon Wireless |
| (443)253- | Wireless | New Cingular Wireless Pcs |
| (443)254- | Landline | Omnipoint Communications Cap Operations |
| (443)255- | Wireless | New Cingular Wireless Pcs |
| (443)256- | Landline | Ctc Communications |
| (443)257- | Wireless | Verizon Wireless |
| (443)258- | Wireless | New Cingular Wireless Pcs |
| (443)259- | Landline | Verizon Maryland |
| (443)260- | Landline | Verizon Maryland |
| (443)261- | Landline | Mcimetro Access Transmission Services |
| (443)262- | Landline | Verizon Maryland |
| (443)263- | Landline | Verizon Maryland |
| (443)264- | Landline | Core Communications |
| (443)265- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)266- | Landline | Global Crossing Local Services |
| (443)267- | Landline | Teleport Communications America |
| (443)268- | Landline | Core Communications |
| (443)269- | Landline | Core Communications |
| (443)270- | Landline | Paetec Communications |
| (443)271- | Wireless | Sprint Spectrum |
| (443)272- | Landline | Teleport Communications America |
| (443)273- | Landline | Teleport Communications America |
| (443)274- | Landline | Verizon Maryland |
| (443)275- | Landline | Comcast Ip Phone |
| (443)276- | Landline | Mcimetro Access Transmission Services |
| (443)277- | Wireless | Sprint Spectrum |
| (443)278- | Landline | Global Telecom Brokers |
| (443)279- | Landline | Mcimetro Access Transmission Services |
| (443)280- | Wireless | New Cingular Wireless Pcs |
| (443)281- | Landline | Mcimetro Access Transmission Services |
| (443)282- | Wireless | Sprint Spectrum |
| (443)283- | Landline | Paetec Communications |
| (443)284- | Landline | Xo Maryland |
| (443)285- | Landline | Verizon Maryland |
| (443)286- | Wireless | Verizon Wireless |
| (443)287- | Landline | Verizon Maryland |
| (443)288- | Landline | Mcimetro Access Transmission Services |
| (443)289- | Landline | Mcimetro Access Transmission Services |
| (443)290- | Landline | Level 3 Telecom Of Maryland |
| (443)291- | Landline | Global Crossing Local Services |
| (443)292- | Landline | Level 3 Communications |
| (443)293- | Landline | Global Crossing Local Services |
| (443)294- | Landline | Global Crossing Local Services |
| (443)295- | Landline | Level 3 Communications |
| (443)296- | Landline | Global Crossing Local Services |
| (443)297- | Landline | Teleport Communications America |
| (443)298- | Wireless | New Cingular Wireless Pcs |
| (443)299- | Landline | Global Crossing Local Services |
| (443)300- | Landline | Level 3 Communications |
| (443)301- | Wireless | New Cingular Wireless Pcs |
| (443)302- | Landline | Global Crossing Local Services |
| (443)303- | Landline | Global Crossing Local Services |
| (443)304- | Landline | Global Crossing Local Services |
| (443)305- | Landline | Global Crossing Local Services |
| (443)306- | Wireless | Sprint Spectrum |
| (443)307- | Landline | Global Crossing Local Services |
| (443)308- | Landline | Mcimetro Access Transmission Services |
| (443)309- | Wireless | Sprint Spectrum |
| (443)310- | Wireless | New Cingular Wireless Pcs |
| (443)312- | Landline | Global Crossing Local Services |
| (443)313- | Landline | Global Crossing Local Services |
| (443)314- | Wireless | Sprint Spectrum |
| (443)315- | Landline | Global Crossing Local Services |
| (443)316- | Landline | Global Crossing Local Services |
| (443)317- | Landline | Global Crossing Local Services |
| (443)318- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)319- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)320- | Landline | Global Crossing Local Services |
| (443)321- | Landline | Paetec Communications |
| (443)322- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)323- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)324- | Wireless | Sprint Spectrum |
| (443)325- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)326- | Wireless | New Cingular Wireless Pcs |
| (443)327- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)328- | Landline | Ctc Communications |
| (443)329- | Landline | Global Crossing Local Services |
| (443)330- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)331- | Landline | Ctc Communications |
| (443)332- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)333- | Wireless | New Cingular Wireless Pcs |
| (443)334- | Landline | Mcimetro Access Transmission Services |
| (443)335- | Landline | Xo Maryland |
| (443)336- | Wireless | Sprint Spectrum |
| (443)337- | Landline | Core Communications |
| (443)338- | Landline | Ctc Communications |
| (443)339- | Landline | Ctc Communications |
| (443)340- | Wireless | Verizon Wireless |
| (443)341- | Landline | Level 3 Communications |
| (443)342- | Landline | Ctc Communications |
| (443)343- | Landline | Teleport Communications America |
| (443)344- | Landline | Core Communications |
| (443)345- | Landline | Level 3 Communications |
| (443)346- | Landline | Core Communications |
| (443)347- | Landline | Ctc Communications |
| (443)348- | Landline | Teleport Communications America |
| (443)349- | Landline | Core Communications |
| (443)350- | Wireless | Verizon Wireless |
| (443)351- | Landline | Us Lec Of Maryland |
| (443)352- | Landline | Level 3 Communications |
| (443)353- | Landline | Verizon Maryland |
| (443)354- | Landline | Level 3 Communications |
| (443)355- | Landline | Level 3 Communications |
| (443)356- | Landline | Level 3 Communications |
| (443)357- | Landline | Verizon Maryland |
| (443)358- | Landline | Ymax Communications |
| (443)359- | Wireless | Verizon Wireless |
| (443)360- | Landline | Teleport Communications America |
| (443)361- | Landline | Core Communications |
| (443)362- | Landline | Omnipoint Communications Cap Operations |
| (443)363- | Landline | Xo Maryland |
| (443)364- | Landline | Teleport Communications America |
| (443)365- | Landline | Omnipoint Communications Cap Operations |
| (443)366- | Wireless | Sprint Spectrum |
| (443)367- | Landline | Verizon Maryland |
| (443)368- | Landline | Core Communications |
| (443)369- | Landline | Core Communications |
| (443)370- | Wireless | New Cingular Wireless Pcs |
| (443)371- | Landline | Level 3 Communications |
| (443)372- | Landline | Us Lec Of Maryland |
| (443)373- | Wireless | Sprint Spectrum |
| (443)374- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)375- | Wireless | Sprint Spectrum |
| (443)376- | Landline | Teleport Communications America |
| (443)377- | Wireless | Verizon Wireless |
| (443)378- | Wireless | Sprint Spectrum |
| (443)379- | Landline | Comcast Ip Phone |
| (443)380- | Landline | Level 3 Communications |
| (443)381- | Wireless | New Cingular Wireless Pcs |
| (443)382- | Landline | Core Communications |
| (443)383- | Landline | Ctc Communications |
| (443)384- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)385- | Landline | Core Communications |
| (443)386- | Wireless | Verizon Wireless |
| (443)387- | Landline | Core Communications |
| (443)388- | Wireless | Verizon Wireless |
| (443)389- | Landline | Core Communications |
| (443)390- | Landline | Global Crossing Local Services |
| (443)391- | Landline | Global Crossing Local Services |
| (443)392- | Landline | At&T |
| (443)393- | Landline | Global Crossing Local Services |
| (443)394- | Landline | Verizon Maryland |
| (443)395- | Landline | Verizon Maryland |
| (443)396- | Landline | Global Crossing Local Services |
| (443)397- | Wireless | Verizon Wireless |
| (443)398- | Wireless | Sprint Spectrum |
| (443)399- | Landline | Global Crossing Local Services |
| (443)400- | Landline | Mcimetro Access Transmission Services |
| (443)401- | Wireless | Verizon Wireless |
| (443)402- | Landline | Teleport Communications America |
| (443)403- | Landline | Level 3 Communications |
| (443)404- | Wireless | Sprint Spectrum |
| (443)405- | Landline | Global Crossing Local Services |
| (443)406- | Landline | Teleport Communications America |
| (443)407- | Landline | Mcimetro Access Transmission Services |
| (443)408- | Landline | Mcimetro Access Transmission Services |
| (443)409- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)410- | Landline | Centurylink Communications |
| (443)412- | Landline | Teleport Communications America |
| (443)413- | Wireless | Sprint Spectrum |
| (443)414- | Wireless | Sprint Spectrum |
| (443)415- | Wireless | Sprint Spectrum |
| (443)416- | Wireless | Sprint Spectrum |
| (443)417- | Landline | Teleport Communications America |
| (443)418- | Wireless | Sprint Spectrum |
| (443)419- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)420- | Landline | Global Crossing Local Services |
| (443)421- | Wireless | New Cingular Wireless Pcs |
| (443)422- | Wireless | New Cingular Wireless Pcs |
| (443)423- | Landline | Level 3 Communications |
| (443)424- | Landline | Teleport Communications America |
| (443)425- | Landline | Teleport Communications America |
| (443)426- | Landline | Paetec Communications |
| (443)427- | Landline | Core Communications |
| (443)428- | Landline | Core Communications |
| (443)429- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)430- | Landline | Mcimetro Access Transmission Services |
| (443)431- | Landline | Core Communications |
| (443)432- | Landline | Ctc Communications |
| (443)433- | Landline | Mcimetro Access Transmission Services |
| (443)434- | Landline | Telnyx |
| (443)435- | Wireless | Sprint Spectrum |
| (443)436- | Landline | Verizon Maryland |
| (443)437- | Landline | Teleport Communications America |
| (443)438- | Wireless | Verizon Wireless |
| (443)439- | Wireless | Verizon Wireless |
| (443)440- | Landline | Mcimetro Access Transmission Services |
| (443)441- | Landline | Teleport Communications America |
| (443)442- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)444- | Landline | Verizon Maryland |
| (443)445- | Landline | Verizon Maryland |
| (443)446- | Landline | Mcimetro Access Transmission Services |
| (443)447- | Wireless | New Cingular Wireless Pcs |
| (443)448- | Landline | Comcast Ip Phone |
| (443)449- | Landline | Broadview Networks |
| (443)450- | Landline | Level 3 Communications |
| (443)451- | Landline | Paetec Communications |
| (443)452- | Landline | Us Lec Of Maryland |
| (443)453- | Landline | Onvoy |
| (443)454- | Landline | Omnipoint Communications Cap Operations |
| (443)455- | Landline | Verizon Maryland |
| (443)456- | Landline | Comcast Ip Phone |
| (443)457- | Landline | Teleport Communications America |
| (443)458- | Landline | Mcimetro Access Transmission Services |
| (443)459- | Landline | Paetec Communications |
| (443)460- | Landline | Mcimetro Access Transmission Services |
| (443)461- | Landline | Us Lec Of Maryland |
| (443)462- | Wireless | Verizon Wireless |
| (443)463- | Wireless | Sprint Spectrum |
| (443)464- | Landline | Broadview Networks |
| (443)465- | Wireless | Verizon Wireless |
| (443)466- | Wireless | Sprint Spectrum |
| (443)467- | Wireless | New Cingular Wireless Pcs |
| (443)468- | Wireless | Sprint Spectrum |
| (443)469- | Wireless | New Cingular Wireless Pcs |
| (443)470- | Landline | Us Lec Of Maryland |
| (443)471- | Landline | Us Lec Of Maryland |
| (443)472- | Landline | Level 3 Communications |
| (443)473- | Wireless | Sprint Spectrum |
| (443)474- | Wireless | New Cingular Wireless Pcs |
| (443)475- | Landline | Mcimetro Access Transmission Services |
| (443)476- | Landline | Verizon Maryland |
| (443)477- | Wireless | Verizon Wireless |
| (443)478- | Wireless | Verizon Wireless |
| (443)479- | Landline | Verizon Maryland |
| (443)480- | Wireless | Verizon Wireless |
| (443)481- | Landline | Us Lec Of Maryland |
| (443)482- | Landline | Verizon Maryland |
| (443)483- | Landline | Level 3 Communications |
| (443)484- | Landline | Level 3 Communications |
| (443)485- | Landline | Level 3 Communications |
| (443)486- | Landline | Level 3 Communications |
| (443)487- | Landline | Level 3 Communications |
| (443)488- | Wireless | New Cingular Wireless Pcs |
| (443)489- | Landline | Teleport Communications America |
| (443)490- | Landline | Global Crossing Local Services |
| (443)491- | Landline | Global Crossing Local Services |
| (443)492- | Landline | Global Crossing Local Services |
| (443)493- | Wireless | Verizon Wireless |
| (443)494- | Landline | Global Crossing Local Services |
| (443)495- | Landline | Global Crossing Local Services |
| (443)496- | Wireless | Sprint Spectrum |
| (443)497- | Wireless | Sprint Spectrum |
| (443)498- | Landline | Mcimetro Access Transmission Services |
| (443)499- | Landline | Global Crossing Local Services |
| (443)500- | Wireless | New Cingular Wireless Pcs |
| (443)501- | Landline | Global Crossing Local Services |
| (443)502- | Landline | Teleport Communications America |
| (443)503- | Landline | Mcimetro Access Transmission Services |
| (443)504- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)505- | Landline | Global Crossing Local Services |
| (443)506- | Wireless | Sprint Spectrum |
| (443)507- | Landline | Teleport Communications America |
| (443)508- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)509- | Wireless | Verizon Wireless |
| (443)510- | Wireless | Verizon Wireless |
| (443)512- | Landline | Verizon Maryland |
| (443)513- | Wireless | New Cingular Wireless Pcs |
| (443)514- | Landline | Us Lec Of Maryland |
| (443)515- | Wireless | Verizon Wireless |
| (443)516- | Landline | Global Crossing Local Services |
| (443)517- | Landline | Global Crossing Local Services |
| (443)518- | Landline | Verizon Maryland |
| (443)519- | Landline | Global Crossing Local Services |
| (443)520- | Wireless | New Cingular Wireless Pcs |
| (443)521- | Wireless | Verizon Wireless |
| (443)522- | Landline | Paetec Communications |
| (443)523- | Landline | Verizon Maryland |
| (443)524- | Landline | Mcimetro Access Transmission Services |
| (443)525- | Wireless | New Cingular Wireless Pcs |
| (443)526- | Landline | Ctc Communications |
| (443)527- | Landline | Omnipoint Communications Cap Operations |
| (443)528- | Wireless | Sprint Spectrum |
| (443)529- | Landline | Omnipoint Communications Cap Operations |
| (443)530- | Landline | Paetec Communications |
| (443)531- | Wireless | New Cingular Wireless Pcs |
| (443)532- | Wireless | Sprint Spectrum |
| (443)533- | Landline | Teleport Communications America |
| (443)534- | Wireless | Verizon Wireless |
| (443)535- | Landline | Verizon Maryland |
| (443)536- | Wireless | Sprint Spectrum |
| (443)537- | Wireless | Verizon Wireless |
| (443)538- | Landline | Omnipoint Communications Cap Operations |
| (443)539- | Landline | Us Lec Of Maryland |
| (443)540- | Wireless | New Cingular Wireless Pcs |
| (443)541- | Landline | Paetec Communications |
| (443)542- | Landline | Comcast Ip Phone |
| (443)543- | Landline | Verizon Maryland |
| (443)544- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)545- | Landline | Level 3 Communications |
| (443)546- | Landline | Verizon Maryland |
| (443)547- | Wireless | Verizon Wireless |
| (443)548- | Landline | Mcimetro Access Transmission Services |
| (443)549- | Landline | Us Lec Of Maryland |
| (443)550- | Landline | Level 3 Communications |
| (443)551- | Landline | Level 3 Communications |
| (443)552- | Landline | Verizon Maryland |
| (443)553- | Wireless | Verizon Wireless |
| (443)554- | Landline | Omnipoint Communications Cap Operations |
| (443)556- | Landline | Verizon Maryland |
| (443)557- | Landline | Mcimetro Access Transmission Services |
| (443)558- | Landline | Mcimetro Access Transmission Services |
| (443)559- | Landline | Comcast Ip Phone |
| (443)560- | Wireless | Sprint Spectrum |
| (443)561- | Landline | Us Lec Of Maryland |
| (443)562- | Wireless | New Cingular Wireless Pcs |
| (443)563- | Wireless | Sprint Spectrum |
| (443)564- | Landline | Level 3 Communications |
| (443)565- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)566- | Wireless | Verizon Wireless |
| (443)567- | Landline | Level 3 Communications |
| (443)568- | Landline | Mcimetro Access Transmission Services |
| (443)569- | Landline | Level 3 Communications |
| (443)570- | Landline | Omnipoint Communications Cap Operations |
| (443)571- | Wireless | Verizon Wireless |
| (443)572- | Landline | Verizon Maryland |
| (443)573- | Landline | Us Lec Of Maryland |
| (443)574- | Landline | Us Lec Of Maryland |
| (443)575- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)576- | Landline | Mcimetro Access Transmission Services |
| (443)577- | Landline | Us Lec Of Maryland |
| (443)578- | Landline | Xo Maryland |
| (443)579- | Landline | Us Lec Of Maryland |
| (443)580- | Wireless | Sprint Spectrum |
| (443)581- | Landline | Xo Maryland |
| (443)582- | Landline | Ctc Communications |
| (443)583- | Landline | Ctc Communications |
| (443)584- | Landline | Ctc Communications |
| (443)585- | Landline | Ctc Communications |
| (443)586- | Landline | Xo Maryland |
| (443)587- | Landline | Ctc Communications |
| (443)588- | Landline | Mcimetro Access Transmission Services |
| (443)589- | Landline | Us Lec Of Maryland |
| (443)590- | Landline | Global Crossing Local Services |
| (443)591- | Wireless | Verizon Wireless |
| (443)592- | Landline | Core Communications |
| (443)593- | Landline | Ctc Communications |
| (443)594- | Landline | Global Crossing Local Services |
| (443)595- | Landline | Global Crossing Local Services |
| (443)596- | Landline | Xo Maryland |
| (443)597- | Landline | Global Crossing Local Services |
| (443)598- | Landline | Global Crossing Local Services |
| (443)599- | Landline | Global Crossing Local Services |
| (443)600- | Landline | Omnipoint Communications Cap Operations |
| (443)601- | Landline | Ctc Communications |
| (443)602- | Wireless | Verizon Wireless |
| (443)603- | Landline | Paetec Communications |
| (443)604- | Wireless | Verizon Wireless |
| (443)605- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)606- | Landline | Ctc Communications |
| (443)607- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)608- | Wireless | New Cingular Wireless Pcs |
| (443)609- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)610- | Wireless | Verizon Wireless |
| (443)612- | Landline | Verizon Maryland |
| (443)613- | Wireless | New Cingular Wireless Pcs |
| (443)614- | Wireless | Verizon Wireless |
| (443)615- | Wireless | Verizon Wireless |
| (443)616- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)617- | Wireless | Verizon Wireless |
| (443)618- | Wireless | Verizon Wireless |
| (443)619- | Wireless | Verizon Wireless |
| (443)620- | Landline | Teleport Communications America |
| (443)621- | Wireless | Sprint Spectrum |
| (443)622- | Wireless | Sprint Spectrum |
| (443)623- | Wireless | Sprint Spectrum |
| (443)624- | Wireless | Verizon Wireless |
| (443)625- | Landline | Level 3 Communications |
| (443)626- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)627- | Landline | Level 3 Communications |
| (443)628- | Landline | Core Communications |
| (443)629- | Wireless | Sprint Spectrum |
| (443)630- | Wireless | Verizon Wireless |
| (443)631- | Wireless | New Cingular Wireless Pcs |
| (443)632- | Landline | Us Lec Of Maryland |
| (443)633- | Wireless | Sprint Spectrum |
| (443)634- | Landline | Verizon Maryland |
| (443)635- | Wireless | New Cingular Wireless Pcs |
| (443)636- | Landline | Omnipoint Communications Cap Operations |
| (443)637- | Landline | Mcimetro Access Transmission Services |
| (443)638- | Landline | Global Naps South |
| (443)639- | Landline | Ctc Communications |
| (443)640- | Landline | Us Lec Of Maryland |
| (443)641- | Landline | Level 3 Communications |
| (443)642- | Wireless | Verizon Wireless |
| (443)643- | Landline | Verizon Maryland |
| (443)644- | Landline | Ctc Communications |
| (443)645- | Landline | Ctc Communications |
| (443)646- | Landline | Ctc Communications |
| (443)647- | Landline | Ctc Communications |
| (443)648- | Landline | Teleport Communications America |
| (443)649- | Landline | Us Lec Of Maryland |
| (443)650- | Landline | Mcimetro Access Transmission Services |
| (443)651- | Wireless | Verizon Wireless |
| (443)652- | Landline | Omnipoint Communications Cap Operations |
| (443)653- | Landline | Omnipoint Communications Cap Operations |
| (443)654- | Landline | Verizon Maryland |
| (443)655- | Wireless | New Cingular Wireless Pcs |
| (443)656- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)657- | Landline | Level 3 Telecom Of Maryland |
| (443)658- | Landline | Onvoy |
| (443)659- | Landline | Onvoy |
| (443)660- | Landline | Comcast Ip Phone |
| (443)661- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)662- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)663- | Landline | Verizon Maryland |
| (443)664- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)665- | Landline | Core Communications |
| (443)666- | Landline | Level 3 Communications |
| (443)668- | Wireless | New Cingular Wireless Pcs |
| (443)669- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)670- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)671- | Landline | Teleport Communications America |
| (443)672- | Landline | Teleport Communications America |
| (443)673- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)674- | Landline | Teleport Communications America |
| (443)675- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)676- | Wireless | New Cingular Wireless Pcs |
| (443)677- | Wireless | Sprint Spectrum |
| (443)678- | Landline | Verizon Maryland |
| (443)679- | Landline | Teleport Communications America |
| (443)680- | Wireless | Sprint Spectrum |
| (443)681- | Wireless | Verizon Wireless |
| (443)682- | Wireless | Verizon Wireless |
| (443)683- | Wireless | Verizon Wireless |
| (443)684- | Wireless | Verizon Wireless |
| (443)685- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)686- | Wireless | Verizon Wireless |
| (443)687- | Wireless | Verizon Wireless |
| (443)688- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)689- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)690- | Wireless | Verizon Wireless |
| (443)691- | Wireless | New Cingular Wireless Pcs |
| (443)692- | Landline | Mcimetro Access Transmission Services |
| (443)693- | Landline | Teleport Communications America |
| (443)694- | Wireless | Sprint Spectrum |
| (443)695- | Wireless | Verizon Wireless |
| (443)696- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)697- | Landline | Global Naps South |
| (443)698- | Landline | Teleport Communications America |
| (443)699- | Wireless | Verizon Wireless |
| (443)701- | Landline | Mcimetro Access Transmission Services |
| (443)702- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)703- | Landline | Mcimetro Access Transmission Services |
| (443)704- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)705- | Landline | Xo Maryland |
| (443)706- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)707- | Landline | Local Access |
| (443)708- | Landline | Level 3 Telecom Of Maryland |
| (443)709- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)710- | Landline | Mcimetro Access Transmission Services |
| (443)712- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)713- | Landline | Peerless Network Of Maryland |
| (443)714- | Wireless | Sprint Spectrum |
| (443)715- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)716- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)717- | Wireless | Verizon Wireless |
| (443)718- | Landline | Us Lec Of Maryland |
| (443)719- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)720- | Landline | Xo Maryland |
| (443)721- | Wireless | Verizon Wireless |
| (443)722- | Landline | Omnipoint Communications Cap Operations |
| (443)723- | Wireless | Sprint Spectrum |
| (443)724- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)725- | Landline | Paetec Communications |
| (443)726- | Wireless | Sprint Spectrum |
| (443)727- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)728- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)729- | Landline | Paetec Communications |
| (443)730- | Landline | Paetec Communications |
| (443)731- | Landline | Teleport Communications America |
| (443)732- | Landline | Teleport Communications America |
| (443)733- | Landline | Teleport Communications America |
| (443)734- | Landline | Verizon Maryland |
| (443)735- | Wireless | New Cingular Wireless Pcs |
| (443)736- | Wireless | New Cingular Wireless Pcs |
| (443)737- | Landline | Paetec Communications |
| (443)738- | Landline | Paetec Communications |
| (443)739- | Landline | Omnipoint Communications Cap Operations |
| (443)740- | Landline | Level 3 Communications |
| (443)741- | Landline | Mcimetro Access Transmission Services |
| (443)742- | Wireless | New Cingular Wireless Pcs |
| (443)743- | Wireless | Verizon Wireless |
| (443)744- | Wireless | Sprint Spectrum |
| (443)745- | Wireless | Verizon Wireless |
| (443)746- | Landline | Level 3 Communications |
| (443)747- | Landline | Core Communications |
| (443)748- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)749- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)750- | Wireless | Verizon Wireless |
| (443)751- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)752- | Wireless | Verizon Wireless |
| (443)753- | Landline | Mcimetro Access Transmission Services |
| (443)754- | Wireless | Verizon Wireless |
| (443)755- | Landline | Verizon Maryland |
| (443)756- | Wireless | New Cingular Wireless Pcs |
| (443)757- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)758- | Wireless | Verizon Wireless |
| (443)759- | Wireless | Verizon Wireless |
| (443)760- | Landline | At&T |
| (443)761- | Landline | Omnipoint Communications Cap Operations |
| (443)762- | Wireless | Sprint Spectrum |
| (443)763- | Landline | Omnipoint Communications Cap Operations |
| (443)764- | Landline | Omnipoint Communications Cap Operations |
| (443)765- | Wireless | New Cingular Wireless Pcs |
| (443)766- | Landline | Us Lec Of Maryland |
| (443)767- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)768- | Wireless | Sprint Spectrum |
| (443)769- | Landline | Omnipoint Communications Cap Operations |
| (443)770- | Landline | Verizon Maryland |
| (443)771- | Wireless | Verizon Wireless |
| (443)772- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)773- | Landline | Mcimetro Access Transmission Services |
| (443)774- | Wireless | New Cingular Wireless Pcs |
| (443)775- | Wireless | Verizon Wireless |
| (443)776- | Landline | Bandwidth.Com Clec |
| (443)777- | Landline | Verizon Maryland |
| (443)778- | Landline | Verizon Maryland |
| (443)779- | Landline | Xo Maryland |
| (443)780- | Landline | Us Lec Of Maryland |
| (443)781- | Landline | Xo Maryland |
| (443)782- | Landline | Xo Maryland |
| (443)783- | Wireless | Verizon Wireless |
| (443)784- | Landline | Teleport Communications America |
| (443)785- | Landline | Onvoy |
| (443)786- | Wireless | Verizon Wireless |
| (443)787- | Landline | Ctc Communications |
| (443)788- | Landline | Xo Maryland |
| (443)789- | Wireless | New Cingular Wireless Pcs |
| (443)790- | Wireless | Sprint Spectrum |
| (443)791- | Wireless | New Cingular Wireless Pcs |
| (443)792- | Landline | Verizon Maryland |
| (443)793- | Landline | Mcimetro Access Transmission Services |
| (443)794- | Wireless | New Cingular Wireless Pcs |
| (443)795- | Landline | Mcimetro Access Transmission Services |
| (443)796- | Landline | Mcimetro Access Transmission Services |
| (443)797- | Landline | Mcimetro Access Transmission Services |
| (443)798- | Landline | Level 3 Telecom Of Maryland |
| (443)799- | Wireless | New Cingular Wireless Pcs |
| (443)800- | Wireless | Sprint Spectrum |
| (443)801- | Wireless | Sprint Spectrum |
| (443)802- | Wireless | Sprint Spectrum |
| (443)803- | Wireless | Sprint Spectrum |
| (443)804- | Wireless | Sprint Spectrum |
| (443)805- | Landline | Omnipoint Communications Cap Operations |
| (443)806- | Wireless | Sprint Spectrum |
| (443)807- | Wireless | Sprint Spectrum |
| (443)808- | Landline | Bandwidth.Com Clec |
| (443)809- | Landline | Level 3 Communications |
| (443)810- | Wireless | Sprint Spectrum |
| (443)812- | Wireless | Verizon Wireless |
| (443)813- | Wireless | Verizon Wireless |
| (443)814- | Wireless | Verizon Wireless |
| (443)815- | Landline | Mcimetro Access Transmission Services |
| (443)816- | Landline | Mcimetro Access Transmission Services |
| (443)817- | Landline | Mcimetro Access Transmission Services |
| (443)818- | Landline | Level 3 Communications |
| (443)819- | Landline | Omnipoint Communications Cap Operations |
| (443)820- | Landline | Paetec Communications |
| (443)821- | Wireless | Sprint Spectrum |
| (443)822- | Wireless | Sprint Spectrum |
| (443)823- | Wireless | Verizon Wireless |
| (443)824- | Landline | Omnipoint Communications Cap Operations |
| (443)825- | Landline | Omnipoint Communications Cap Operations |
| (443)826- | Wireless | Verizon Wireless |
| (443)827- | Wireless | Verizon Wireless |
| (443)828- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)829- | Wireless | Sprint Spectrum |
| (443)830- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)831- | Wireless | New Cingular Wireless Pcs |
| (443)832- | Landline | Level 3 Communications |
| (443)833- | Landline | Us Lec Of Maryland |
| (443)834- | Wireless | Verizon Wireless |
| (443)835- | Wireless | Verizon Wireless |
| (443)836- | Landline | Xo Maryland |
| (443)837- | Landline | Us Lec Of Maryland |
| (443)838- | Wireless | New Cingular Wireless Pcs |
| (443)839- | Landline | Omnipoint Communications Cap Operations |
| (443)840- | Wireless | New Cingular Wireless Pcs |
| (443)841- | Landline | Verizon Maryland |
| (443)842- | Wireless | Verizon Wireless |
| (443)843- | Landline | Verizon Maryland |
| (443)844- | Wireless | Verizon Wireless |
| (443)845- | Wireless | Verizon Wireless |
| (443)846- | Wireless | New Cingular Wireless Pcs |
| (443)847- | Wireless | Verizon Wireless |
| (443)848- | Wireless | Sprint Spectrum |
| (443)849- | Landline | Verizon Maryland |
| (443)850- | Landline | Omnipoint Communications Cap Operations |
| (443)851- | Landline | Omnipoint Communications Cap Operations |
| (443)852- | Wireless | New Cingular Wireless Pcs |
| (443)853- | Wireless | Verizon Wireless |
| (443)854- | Landline | Omnipoint Communications Cap Operations |
| (443)855- | Landline | Lightwave Communications |
| (443)856- | Landline | Core Communications |
| (443)857- | Landline | Omnipoint Communications Cap Operations |
| (443)858- | Landline | Omnipoint Communications Cap Operations |
| (443)859- | Landline | Omnipoint Communications Cap Operations |
| (443)860- | Wireless | New Cingular Wireless Pcs |
| (443)861- | Landline | Verizon Maryland |
| (443)862- | Wireless | Verizon Wireless |
| (443)863- | Wireless | Verizon Wireless |
| (443)864- | Wireless | Sprint Spectrum |
| (443)865- | Wireless | Sprint Spectrum |
| (443)866- | Wireless | Sprint Spectrum |
| (443)867- | Landline | Paetec Communications |
| (443)868- | Landline | Verizon Maryland |
| (443)869- | Wireless | Verizon Wireless |
| (443)870- | Landline | Level 3 Telecom Of Maryland |
| (443)871- | Wireless | Sprint Spectrum |
| (443)872- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)873- | Landline | Onvoy |
| (443)874- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)875- | Wireless | New Cingular Wireless Pcs |
| (443)876- | Wireless | Sprint Spectrum |
| (443)877- | Landline | Level 3 Communications |
| (443)878- | Wireless | Verizon Wireless |
| (443)879- | Landline | Verizon Maryland |
| (443)880- | Landline | Teleport Communications America |
| (443)881- | Landline | Metropcs |
| (443)882- | Wireless | Sprint Spectrum |
| (443)883- | Landline | Teleport Communications America |
| (443)884- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)885- | Landline | Verizon Maryland |
| (443)886- | Landline | Teleport Communications America |
| (443)887- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)888- | Landline | Cavalier Telephone, Llc (Mid-Atlantic) |
| (443)889- | Landline | Omnipoint Communications Cap Operations |
| (443)890- | Wireless | Verizon Wireless |
| (443)891- | Landline | Mcimetro Access Transmission Services |
| (443)892- | Landline | Bandwidth.Com Clec |
| (443)893- | Landline | Mcimetro Access Transmission Services |
| (443)894- | Wireless | Sprint Spectrum |
| (443)895- | Wireless | Verizon Wireless |
| (443)896- | Landline | Teleport Communications America |
| (443)897- | Wireless | New Cingular Wireless Pcs |
| (443)898- | Landline | Level 3 Communications |
| (443)899- | Landline | Level 3 Communications |
| (443)900- | Wireless | Verizon Wireless |
| (443)901- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)902- | Wireless | Verizon Wireless |
| (443)903- | Wireless | Verizon Wireless |
| (443)904- | Wireless | Verizon Wireless |
| (443)905- | Wireless | Sprint Spectrum |
| (443)906- | Landline | Peerless Network Of Maryland |
| (443)907- | Wireless | Verizon Wireless |
| (443)908- | Wireless | Verizon Wireless |
| (443)909- | Wireless | Verizon Wireless |
| (443)910- | Wireless | New Cingular Wireless Pcs |
| (443)912- | Landline | Core Communications |
| (443)913- | Wireless | Sprint Spectrum |
| (443)914- | Landline | Teleport Communications America |
| (443)915- | Wireless | Verizon Wireless |
| (443)916- | Wireless | Sprint Spectrum |
| (443)917- | Landline | Onvoy |
| (443)918- | Landline | Teleport Communications America |
| (443)919- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)920- | Landline | Teleport Communications America |
| (443)921- | Landline | Paetec Communications |
| (443)922- | Landline | Atx Telecommunications Services, Ltd. |
| (443)923- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)924- | Wireless | Verizon Wireless |
| (443)925- | Landline | Omnipoint Communications Cap Operations |
| (443)926- | Landline | Level 3 Communications |
| (443)927- | Landline | Level 3 Communications |
| (443)928- | Wireless | Verizon Wireless |
| (443)929- | Landline | Omnipoint Communications Cap Operations |
| (443)930- | Wireless | Verizon Wireless |
| (443)931- | Landline | Mcimetro Access Transmission Services |
| (443)932- | Wireless | Sprint Spectrum |
| (443)933- | Landline | Teleport Communications America |
| (443)934- | Wireless | Verizon Wireless |
| (443)935- | Wireless | New Cingular Wireless Pcs |
| (443)936- | Wireless | New Cingular Wireless Pcs |
| (443)937- | Landline | Teleport Communications America |
| (443)938- | Wireless | Verizon Wireless |
| (443)939- | Landline | Omnipoint Communications Cap Operations |
| (443)940- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)941- | Wireless | New Cingular Wireless Pcs |
| (443)942- | Landline | Teleport Communications America |
| (443)943- | Landline | Teleport Communications America |
| (443)944- | Landline | Comcast Ip Phone |
| (443)945- | Wireless | New Cingular Wireless Pcs |
| (443)946- | Landline | Core Communications |
| (443)947- | Landline | Ctc Communications |
| (443)948- | Wireless | Sprint Spectrum |
| (443)949- | Landline | Comcast Ip Phone |
| (443)951- | Landline | Global Crossing Local Services |
| (443)952- | Wireless | Verizon Wireless |
| (443)953- | Wireless | Verizon Wireless |
| (443)954- | Landline | Paetec Communications |
| (443)955- | Wireless | Verizon Wireless |
| (443)956- | Wireless | New Cingular Wireless Pcs |
| (443)957- | Landline | At&T |
| (443)960- | Wireless | Verizon Wireless |
| (443)961- | Landline | Intrado Communications |
| (443)962- | Wireless | Verizon Wireless |
| (443)963- | Landline | Bandwidth.Com Clec |
| (443)964- | Landline | Level 3 Communications |
| (443)965- | Wireless | Sprint Spectrum |
| (443)966- | Wireless | Verizon Wireless |
| (443)967- | Landline | Verizon Maryland |
| (443)968- | Wireless | New Cingular Wireless Pcs |
| (443)969- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)970- | Wireless | Verizon Wireless |
| (443)971- | Landline | Bandwidth.Com Clec |
| (443)972- | Landline | Us Lec Of Maryland |
| (443)973- | Landline | Mcimetro Access Transmission Services |
| (443)974- | Landline | Teleport Communications America |
| (443)975- | Wireless | New Cingular Wireless Pcs |
| (443)977- | Wireless | Verizon Wireless |
| (443)978- | Wireless | Verizon Wireless |
| (443)979- | Wireless | Verizon Wireless |
| (443)980- | Wireless | New Cingular Wireless Pcs |
| (443)981- | Wireless | Verizon Wireless |
| (443)982- | Landline | Ymax Communications |
| (443)983- | Landline | Omnipoint Communications Cap Operations |
| (443)984- | Landline | Verizon Maryland |
| (443)985- | Landline | Omnipoint Communications Cap Operations |
| (443)986- | Wireless | Verizon Wireless |
| (443)987- | Wireless | Verizon Wireless |
| (443)988- | Landline | Level 3 Communications |
| (443)989- | Landline | Cavalier Telephone Mid-Atlantic |
| (443)990- | Landline | Bandwidth.Com Clec |
| (443)991- | Wireless | Verizon Wireless |
| (443)992- | Landline | Level 3 Communications |
| (443)993- | Landline | Metropcs |
| (443)994- | Wireless | New Cingular Wireless Pcs |
| (443)995- | Wireless | New Cingular Wireless Pcs |
| (443)996- | Wireless | New Cingular Wireless Pcs |
| (443)997- | Landline | Verizon Maryland |
| (443)998- | Landline | Verizon Maryland |
| No prefixes match “”. | ||
Frequently Asked Questions about the 443 Area Code
Who called me from a 443 number?
A 443 number is assigned to Baltimore, Maryland, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 443 code to look nearby, so a 443 number doesn't prove the caller is local. Recently, 1,516 unwanted-call complaints were reported to the FTC for numbers showing the 443 code (56% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 443 a scam area code?
No area code is a scam on its own. 443 is a normal, officially assigned code for Baltimore, Maryland. Spam callers spoof local codes to raise the odds you answer, so 443 on your caller ID says nothing about who is really calling. Recently, 1,516 unwanted-call complaints were reported to the FTC for numbers showing the 443 code (56% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 443 area code?
Repeated calls from different 443 numbers are usually spoofing: a robocaller rotates through 443 numbers so each call looks local and slips past simple blocks. Recently, 1,516 unwanted-call complaints were reported to the FTC for numbers showing the 443 code (56% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 443 number?
If you aren't expecting a 443 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 443 area code?
Block a single 443 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 443 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 443?
Area code 443 covers Baltimore and the surrounding area in Maryland, spanning 208 cities with about 3,212,271 residents. It shares its area with overlay codes 410, 667.
When did area code 443 go into service?
Area code 443 went into service on June 1, 1997. It was added as an overlay of 410, so 443 numbers serve the same area that 410 already covered.
Is 443 a real area code?
Yes. 443 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Baltimore, Maryland. A real code can still show up on spoofed spam calls, so treat unknown 443 calls with normal caution.
What timezone is the 443 area code in?
The 443 area code is in the Eastern Time (ET). Because a number can be kept when someone moves or switches to VoIP, a specific 443 caller may not be in that zone.
How do I call a 443 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 443 and the seven-digit number. From a mobile phone you can usually just enter +1 443 followed by the number and let the phone add the exit code for you.