720 Area CodeDenver, CO
Area code 720 covers Denver and nearby communities in Colorado, in the Mountain Time (MT) zone, home to about 3,380,487 people across 137 cities. It was added in 1998 as an overlay of 303, so the same region uses several codes and every local call needs all ten digits.
Overview
- Major City
- Denver
- State
- Colorado (CO)
- Timezone
- Mountain Time (MT)
- Current Time
- –:––
- Overlay
- Yes – shares area with 303, 983
Overview of the 720 Area Code
What is the 720 area code?
The 720 area code serves Denver, Colorado, alongside other established area codes. When you see a 720 number, it indicates a local number within this geographic area.
Why was area code 720 created?
Area code 720 went into service on June 1, 1998, as an overlay of 303. An overlay adds a second code to the same territory instead of splitting it: existing 303 numbers kept their digits, new lines began receiving 720 numbers, and local calls in the region require all ten digits. The same territory also carries 983.
Geographic Coverage of the 720 Area Code
The 720 area code serves Denver and surrounding areas in Colorado. It operates within the Mountain Time (MT) time zone. It complements the coverage of area codes 303 and 983. This area code covers several key cities, including:
- Denver
- Aurora
- Lakewood
- Thornton
- Arvada
- Westminster
Got a call from a 720 number? It came from Denver, CO. Since 720 overlays with 303 and 983, every local call in the region needs all ten digits to land on the right line. Of the listed cities' population, Denver accounts for about 23.0%; the rest is split across 136 smaller cities.
Denver Area Codes Overview
Denver is served by multiple area codes, reflecting its telecommunications needs. The 720 area code operates alongside 303, 983. Here are the area codes serving this region:
The introduction of the 720 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 720 cover?
| City | State | Population | Population in 720 | % of listed-city population | % of City |
|---|---|---|---|---|---|
| Denver | CO | 729,019 | 729,019 | 23.0% | 100.0% |
| Aurora | CO | 403,130 | 403,130 | 12.7% | 100.0% |
| Lakewood | CO | 156,868 | 156,868 | 5.0% | 100.0% |
| Thornton | CO | 146,689 | 146,689 | 4.6% | 100.0% |
| Arvada | CO | 121,873 | 121,873 | 3.8% | 100.0% |
| Westminster | CO | 115,302 | 115,302 | 3.6% | 100.0% |
| Centennial | CO | 108,853 | 108,853 | 3.4% | 100.0% |
| Boulder | CO | 106,803 | 106,803 | 3.4% | 100.0% |
| Longmont | CO | 99,818 | 99,818 | 3.2% | 100.0% |
| Highlands Ranch | CO | 96,713 | 96,713 | 3.1% | 100.0% |
| Castle Rock | CO | 83,213 | 83,213 | 2.6% | 100.0% |
| Broomfield | CO | 78,323 | 78,323 | 2.5% | 100.0% |
| Commerce City | CO | 70,245 | 70,245 | 2.2% | 100.0% |
| Parker | CO | 65,473 | 65,473 | 2.1% | 100.0% |
| Littleton | CO | 44,879 | 44,879 | 1.4% | 100.0% |
| Brighton | CO | 43,473 | 43,473 | 1.4% | 100.0% |
| Erie | CO | 38,594 | 38,594 | 1.2% | 100.0% |
| Northglenn | CO | 38,287 | 38,287 | 1.2% | 100.0% |
| Englewood | CO | 35,238 | 35,238 | 1.1% | 100.0% |
| Ken Caryl | CO | 32,438 | 32,438 | 1.0% | 100.0% |
| Dakota Ridge | CO | 32,005 | 32,005 | 1.0% | 100.0% |
| Wheat Ridge | CO | 31,999 | 31,999 | 1.0% | 100.0% |
| Lafayette | CO | 30,587 | 30,587 | 1.0% | 100.0% |
| Columbine | CO | 24,280 | 24,280 | 0.8% | 100.0% |
| Louisville | CO | 20,811 | 20,811 | 0.7% | 100.0% |
| Golden | CO | 20,151 | 20,151 | 0.6% | 100.0% |
| Firestone | CO | 19,396 | 19,396 | 0.6% | 100.0% |
| Sherrelwood | CO | 18,287 | 18,287 | 0.6% | 100.0% |
| Frederick | CO | 17,937 | 17,937 | 0.6% | 100.0% |
| Greenwood Village | CO | 15,288 | 15,288 | 0.5% | 100.0% |
| Castle Pines | CO | 15,162 | 15,162 | 0.5% | 100.0% |
| Welby | CO | 14,846 | 14,846 | 0.5% | 100.0% |
| Lone Tree | CO | 14,061 | 14,061 | 0.5% | 100.0% |
| Federal Heights | CO | 13,971 | 13,971 | 0.4% | 100.0% |
| Superior | CO | 13,654 | 13,654 | 0.4% | 100.0% |
| Berkley | CO | 11,207 | 11,207 | 0.4% | 100.0% |
| Cherry Creek | CO | 11,120 | 11,120 | 0.4% | 100.0% |
| The Pinery | CO | 10,517 | 10,517 | 0.3% | 100.0% |
| Castle Pines North | CO | 10,360 | 10,360 | 0.3% | 100.0% |
| Fort Lupton | CO | 9,948 | 9,948 | 0.3% | 100.0% |
| Gunbarrel | CO | 9,263 | 9,263 | 0.3% | 100.0% |
| Roxborough Park | CO | 9,099 | 9,099 | 0.3% | 100.0% |
| Evergreen | CO | 9,038 | 9,038 | 0.3% | 100.0% |
| Stonegate | CO | 8,962 | 8,962 | 0.3% | 100.0% |
| Lochbuie | CO | 8,599 | 8,599 | 0.3% | 100.0% |
| Derby | CO | 7,685 | 7,685 | 0.3% | 100.0% |
| Fairmount | CO | 7,559 | 7,559 | 0.2% | 100.0% |
| Applewood | CO | 7,160 | 7,160 | 0.2% | 100.0% |
| Dacono | CO | 6,748 | 6,748 | 0.2% | 100.0% |
| Mead | CO | 6,735 | 0 | 0.2% | 0.0% |
| Cherry Hills Village | CO | 6,349 | 6,349 | 0.2% | 100.0% |
| Twin Lakes | CO | 6,101 | 6,101 | 0.2% | 100.0% |
| Sheridan | CO | 5,932 | 5,932 | 0.2% | 100.0% |
| Dove Valley | CO | 5,243 | 5,243 | 0.2% | 100.0% |
| Shaw Heights | CO | 5,116 | 5,116 | 0.2% | 100.0% |
| Edgewater | CO | 4,880 | 4,880 | 0.2% | 100.0% |
| Glendale | CO | 4,465 | 4,465 | 0.1% | 100.0% |
| Glendale | CO | 4,465 | 4,465 | 0.1% | 100.0% |
| Niwot | CO | 4,006 | 4,006 | 0.1% | 100.0% |
| Bennett | CO | 3,916 | 3,916 | 0.1% | 100.0% |
| West Pleasant View | CO | 3,840 | 3,840 | 0.1% | 100.0% |
| Todd Creek | CO | 3,768 | 3,768 | 0.1% | 100.0% |
| Genesee | CO | 3,609 | 3,609 | 0.1% | 100.0% |
| Ponderosa Park | CO | 3,232 | 3,232 | 0.1% | 100.0% |
| Acres Green | CO | 3,007 | 3,007 | 0.1% | 100.0% |
| Meridian | CO | 2,970 | 2,970 | 0.1% | 100.0% |
| Elizabeth | CO | 2,773 | 2,773 | 0.1% | 100.0% |
| Holly Hills | CO | 2,521 | 2,521 | 0.1% | 100.0% |
| Strasburg | CO | 2,447 | 2,447 | 0.1% | 100.0% |
| Lyons | CO | 2,155 | 2,155 | 0.1% | 100.0% |
| Keenesburg | CO | 2,054 | 2,054 | 0.1% | 100.0% |
| Idaho Springs | CO | 1,699 | 1,699 | 0.1% | 100.0% |
| Columbine Valley | CO | 1,683 | 1,683 | 0.1% | 100.0% |
| Perry Park | CO | 1,646 | 1,646 | 0.1% | 100.0% |
| Deer Trail | CO | 1,624 | 1,624 | 0.1% | 100.0% |
| Hudson | CO | 1,617 | 1,617 | 0.1% | 100.0% |
| Inverness | CO | 1,532 | 1,532 | 0.1% | 100.0% |
| Nederland | CO | 1,487 | 1,487 | 0.1% | 100.0% |
| Aristocrat Ranchettes | CO | 1,344 | 1,344 | 0.1% | 100.0% |
| Kittredge | CO | 1,304 | 1,304 | 0.0% | 100.0% |
| Indian Hills | CO | 1,280 | 1,280 | 0.0% | 100.0% |
| Georgetown | CO | 1,257 | 1,257 | 0.0% | 100.0% |
| Byers | CO | 1,160 | 1,160 | 0.0% | 100.0% |
| Upper Bear Creek | CO | 1,059 | 1,059 | 0.0% | 100.0% |
| Floyd Hill | CO | 998 | 998 | 0.0% | 100.0% |
| Pine Brook Hill | CO | 983 | 983 | 0.0% | 100.0% |
| Paragon Estates | CO | 928 | 928 | 0.0% | 100.0% |
| Lazy Acres | CO | 920 | 920 | 0.0% | 100.0% |
| Aspen Park | CO | 882 | 882 | 0.0% | 100.0% |
| Aetna Estates | CO | 834 | 834 | 0.0% | 100.0% |
| Bow Mar | CO | 833 | 833 | 0.0% | 100.0% |
| Foxfield | CO | 744 | 744 | 0.0% | 100.0% |
| Kiowa | CO | 734 | 734 | 0.0% | 100.0% |
| Central City | CO | 663 | 663 | 0.0% | 100.0% |
| Watkins | CO | 653 | 653 | 0.0% | 100.0% |
| Downieville-Lawson-Dumont | CO | 594 | 594 | 0.0% | 100.0% |
| Eldorado Springs | CO | 585 | 585 | 0.0% | 100.0% |
| Grand View Estates | CO | 528 | 528 | 0.0% | 100.0% |
| Allenspark | CO | 528 | 528 | 0.0% | 100.0% |
| Mountain View | CO | 521 | 521 | 0.0% | 100.0% |
| Altona | CO | 501 | 501 | 0.0% | 100.0% |
| North Washington | CO | 484 | 484 | 0.0% | 100.0% |
| Franktown | CO | 395 | 395 | 0.0% | 100.0% |
| Morrison | CO | 394 | 394 | 0.0% | 100.0% |
| Comanche Creek | CO | 369 | 369 | 0.0% | 100.0% |
| Coal Creek | CO | 368 | 368 | 0.0% | 100.0% |
| East Pleasant View | CO | 356 | 356 | 0.0% | 100.0% |
| Empire | CO | 324 | 324 | 0.0% | 100.0% |
| St. Ann Highlands | CO | 288 | 288 | 0.0% | 100.0% |
| St. Mary's | CO | 283 | 283 | 0.0% | 100.0% |
| Mountain Meadows | CO | 274 | 274 | 0.0% | 100.0% |
| Louviers | CO | 269 | 269 | 0.0% | 100.0% |
| Sugarloaf | CO | 261 | 261 | 0.0% | 100.0% |
| Idledale | CO | 252 | 252 | 0.0% | 100.0% |
| Jamestown | CO | 246 | 246 | 0.0% | 100.0% |
| Gold Hill | CO | 230 | 230 | 0.0% | 100.0% |
| Sunshine | CO | 230 | 230 | 0.0% | 100.0% |
| Elbert | CO | 230 | 230 | 0.0% | 100.0% |
| Larkspur | CO | 223 | 223 | 0.0% | 100.0% |
| Bark Ranch | CO | 213 | 213 | 0.0% | 100.0% |
| Tall Timber | CO | 208 | 208 | 0.0% | 100.0% |
| Sedalia | CO | 206 | 206 | 0.0% | 100.0% |
| Silver Plume | CO | 188 | 188 | 0.0% | 100.0% |
| Crisman | CO | 186 | 186 | 0.0% | 100.0% |
| Rollinsville | CO | 181 | 181 | 0.0% | 100.0% |
| Peoria | CO | 163 | 163 | 0.0% | 100.0% |
| Eldora | CO | 142 | 142 | 0.0% | 100.0% |
| Westcreek | CO | 129 | 129 | 0.0% | 100.0% |
| Bonanza Mountain Estates | CO | 128 | 128 | 0.0% | 100.0% |
| Ward | CO | 127 | 127 | 0.0% | 100.0% |
| Seven Hills | CO | 121 | 121 | 0.0% | 100.0% |
| Black Hawk | CO | 120 | 120 | 0.0% | 100.0% |
| Brick Center | CO | 107 | 107 | 0.0% | 100.0% |
| Valmont | CO | 59 | 59 | 0.0% | 100.0% |
| Hidden Lake | CO | 31 | 31 | 0.0% | 100.0% |
| Leyner | CO | 29 | 29 | 0.0% | 100.0% |
| Lakeside | CO | 15 | 15 | 0.0% | 100.0% |
City population is shown in full. The share of each city inside 720 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 720 cover?
3,380,487 residents across 13 counties, counted inside the 720 boundary — a county split between codes contributes only its part.
| County | State | Population in 720 | % of area-code footprint | % of County |
|---|---|---|---|---|
| Denver County | CO | 715,522 | 21% | 100% |
| Arapahoe County | CO | 655,070 | 19% | 100% |
| Jefferson County | CO | 582,910 | 17% | 100% |
| Adams County | CO | 519,572 | 15% | 100% |
| Douglas County | CO | 357,978 | 11% | 100% |
| Boulder County | CO | 330,758 | 10% | 100% |
| Weld County | CO | 93,754 | 3% | 28% |
| Broomfield County | CO | 74,112 | 2% | 100% |
| Elbert County | CO | 24,043 | 1% | 92% |
| Park County | CO | 9,762 | 0% | 56% |
| Clear Creek County | CO | 9,397 | 0% | 100% |
| Gilpin County | CO | 5,808 | 0% | 100% |
| Larimer County | CO | 1,801 | 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 720 been reported for unwanted calls?
Yes – 2,091 unwanted-call complaints were reported to the FTC for numbers showing a 720 area code (May 29 – Aug 14, 2026).
- 50% robocalls
- ↓ 5% vs prior period
Most-reported subjects
- Other38%804
- Calls pretending to be government, businesses, or family and friends11%226
- Reducing your debt (credit cards, mortgage, student loans)11%221
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 720?
78% assigned to a telco
- 62% Landline
- 38% Wireless
- 0% Unknown
of 780 | ||
| Prefix | Usage | Carrier |
|---|---|---|
| (720)200- | Landline | Qwest |
| (720)201- | Wireless | New Cingular Wireless Pcs |
| (720)202- | Wireless | Verizon Wireless |
| (720)203- | Wireless | T-Mobile Usa |
| (720)204- | Landline | Level 3 Communications |
| (720)205- | Wireless | T-Mobile Usa |
| (720)206- | Landline | Xo Colorado |
| (720)207- | Landline | Xo Colorado |
| (720)208- | Landline | Xo Colorado |
| (720)209- | Wireless | T-Mobile Usa |
| (720)210- | Landline | Xo Colorado |
| (720)212- | Landline | Xo Colorado |
| (720)213- | Landline | Mcleodusa Telecommunication Services |
| (720)214- | Landline | Mcleodusa Telecommunication Services |
| (720)215- | Wireless | Verizon Wireless |
| (720)216- | Landline | Teleport Communications America |
| (720)217- | Wireless | T-Mobile Usa |
| (720)218- | Wireless | T-Mobile Usa |
| (720)219- | Wireless | Verizon Wireless |
| (720)220- | Wireless | T-Mobile Usa |
| (720)221- | Landline | Xo Colorado |
| (720)222- | Landline | Xo Colorado |
| (720)223- | Landline | Xo Colorado |
| (720)224- | Landline | Xo Colorado |
| (720)225- | Landline | Xo Colorado |
| (720)226- | Landline | Xo Colorado |
| (720)227- | Landline | Xo Colorado |
| (720)228- | Landline | Xo Colorado |
| (720)229- | Landline | Xo Colorado |
| (720)230- | Landline | Xo Colorado |
| (720)231- | Wireless | T-Mobile Usa |
| (720)232- | Wireless | T-Mobile Usa |
| (720)233- | Wireless | T-Mobile Usa |
| (720)234- | Wireless | T-Mobile Usa |
| (720)235- | Wireless | T-Mobile Usa |
| (720)236- | Wireless | T-Mobile Usa |
| (720)237- | Wireless | New Cingular Wireless Pcs |
| (720)238- | Wireless | T-Mobile Usa |
| (720)239- | Landline | At&T |
| (720)240- | Landline | Xo Colorado |
| (720)241- | Landline | Xo Colorado |
| (720)242- | Landline | Qwest |
| (720)243- | Wireless | New Cingular Wireless Pcs |
| (720)244- | Wireless | New Cingular Wireless Pcs |
| (720)245- | Landline | Allstream |
| (720)246- | Landline | Xo Colorado |
| (720)247- | Landline | Xo Colorado |
| (720)248- | Landline | Onvoy |
| (720)249- | Landline | Xo Colorado |
| (720)250- | Landline | Xo Colorado |
| (720)251- | Landline | Level 3 Communications |
| (720)252- | Wireless | T-Mobile Usa |
| (720)253- | Wireless | T-Mobile Usa |
| (720)254- | Wireless | T-Mobile Usa |
| (720)255- | Wireless | T-Mobile Usa |
| (720)256- | Wireless | T-Mobile Usa |
| (720)257- | Landline | Xo Colorado |
| (720)258- | Landline | Teleport Communications America |
| (720)259- | Landline | Level 3 Communications |
| (720)260- | Wireless | T-Mobile Usa |
| (720)261- | Wireless | T-Mobile Usa |
| (720)262- | Landline | Level 3 Communications |
| (720)263- | Landline | Level 3 Communications |
| (720)264- | Landline | Qwest |
| (720)265- | Landline | Xo Colorado |
| (720)266- | Landline | Level 3 Communications |
| (720)267- | Landline | Qwest |
| (720)268- | Landline | Qwest |
| (720)269- | Landline | Teleport Communications America |
| (720)270- | Wireless | T-Mobile Usa |
| (720)271- | Wireless | T-Mobile Usa |
| (720)272- | Wireless | New Cingular Wireless Pcs |
| (720)273- | Wireless | New Cingular Wireless Pcs |
| (720)274- | Landline | Mcleodusa Telecommunication Services |
| (720)275- | Wireless | New Cingular Wireless Pcs |
| (720)276- | Wireless | New Cingular Wireless Pcs |
| (720)277- | Landline | Level 3 Communications |
| (720)278- | Landline | Level 3 Telecom Of Colorado |
| (720)279- | Landline | Level 3 Telecom Of Colorado |
| (720)280- | Wireless | T-Mobile Usa |
| (720)281- | Wireless | Verizon Wireless |
| (720)282- | Landline | Level 3 Telecom Of Colorado |
| (720)283- | Landline | Qwest |
| (720)284- | Landline | Xo Colorado |
| (720)285- | Landline | Xo Colorado |
| (720)286- | Landline | Teleport Communications America |
| (720)287- | Landline | Comcast Ip Phone |
| (720)288- | Landline | Bandwidth.Com Clec |
| (720)289- | Wireless | New Cingular Wireless Pcs |
| (720)290- | Wireless | T-Mobile Usa |
| (720)291- | Wireless | T-Mobile Usa |
| (720)292- | Wireless | New Cingular Wireless Pcs |
| (720)293- | Landline | Xo Colorado |
| (720)294- | Landline | Xo Colorado |
| (720)295- | Landline | Bandwidth.Com Clec |
| (720)296- | Wireless | New Cingular Wireless Pcs |
| (720)297- | Wireless | New Cingular Wireless Pcs |
| (720)298- | Wireless | New Cingular Wireless Pcs |
| (720)299- | Wireless | T-Mobile Usa |
| (720)300- | Wireless | T-Mobile Usa |
| (720)301- | Wireless | T-Mobile Usa |
| (720)302- | Landline | Teleport Communications America |
| (720)304- | Landline | Qwest |
| (720)305- | Landline | Level 3 Telecom Of Colorado |
| (720)306- | Landline | Allstream |
| (720)307- | Landline | At&T |
| (720)308- | Wireless | New Cingular Wireless Pcs |
| (720)309- | Wireless | New Cingular Wireless Pcs |
| (720)310- | Landline | Teleport Communications America |
| (720)312- | Wireless | T-Mobile Usa |
| (720)313- | Wireless | T-Mobile Usa |
| (720)314- | Wireless | T-Mobile Usa |
| (720)315- | Landline | Onvoy |
| (720)316- | Landline | Bandwidth.Com Clec |
| (720)317- | Wireless | T-Mobile Usa |
| (720)318- | Wireless | T-Mobile Usa |
| (720)319- | Wireless | T-Mobile Usa |
| (720)320- | Wireless | New Cingular Wireless Pcs |
| (720)321- | Landline | Qwest |
| (720)322- | Landline | Qwest |
| (720)323- | Wireless | T-Mobile Usa |
| (720)324- | Landline | Comcast Ip Phone |
| (720)325- | Wireless | T-Mobile Usa |
| (720)326- | Wireless | New Cingular Wireless Pcs |
| (720)327- | Wireless | New Cingular Wireless Pcs |
| (720)328- | Landline | Comcast Ip Phone |
| (720)329- | Wireless | New Cingular Wireless Pcs |
| (720)330- | Landline | Level 3 Communications |
| (720)331- | Wireless | T-Mobile Usa |
| (720)332- | Landline | Mcimetro Access Transmission Services |
| (720)333- | Wireless | T-Mobile Usa |
| (720)334- | Wireless | T-Mobile Usa |
| (720)335- | Wireless | T-Mobile Usa |
| (720)336- | Landline | Bandwidth.Com Clec |
| (720)337- | Landline | Qwest |
| (720)338- | Wireless | New Cingular Wireless Pcs |
| (720)339- | Wireless | T-Mobile Usa |
| (720)340- | Wireless | Verizon Wireless |
| (720)341- | Wireless | T-Mobile Usa |
| (720)342- | Landline | Teleport Communications America |
| (720)343- | Landline | Level 3 Communications |
| (720)344- | Landline | Qwest |
| (720)345- | Landline | Zippytech Incorporated |
| (720)346- | Wireless | Verizon Wireless |
| (720)347- | Landline | Level 3 Telecom Of Colorado |
| (720)348- | Landline | Qwest |
| (720)349- | Landline | Teleport Communications America |
| (720)350- | Wireless | T-Mobile Usa |
| (720)351- | Wireless | T-Mobile Usa |
| (720)352- | Wireless | T-Mobile Usa |
| (720)353- | Wireless | T-Mobile Usa |
| (720)354- | Landline | Level 3 Telecom Of Colorado |
| (720)355- | Wireless | Verizon Wireless |
| (720)356- | Landline | At&T |
| (720)357- | Wireless | New Cingular Wireless Pcs |
| (720)358- | Landline | Mcimetro Access Transmission Services |
| (720)359- | Landline | Qwest |
| (720)360- | Wireless | New Cingular Wireless Pcs |
| (720)361- | Landline | Allstream |
| (720)362- | Landline | Qwest |
| (720)363- | Landline | Metropcs |
| (720)364- | Wireless | New Cingular Wireless Pcs |
| (720)365- | Wireless | New Cingular Wireless Pcs |
| (720)366- | Wireless | New Cingular Wireless Pcs |
| (720)367- | Landline | Xo Colorado |
| (720)368- | Landline | Xo Colorado |
| (720)369- | Wireless | New Cingular Wireless Pcs |
| (720)370- | Landline | Bandwidth.Com Clec |
| (720)371- | Wireless | T-Mobile Usa |
| (720)372- | Wireless | T-Mobile Usa |
| (720)373- | Wireless | T-Mobile Usa |
| (720)374- | Landline | Qwest |
| (720)375- | Wireless | Commnet Wireless |
| (720)376- | Landline | Allstream |
| (720)377- | Landline | Xo Colorado |
| (720)378- | Wireless | New Cingular Wireless Pcs |
| (720)379- | Landline | Level 3 Communications |
| (720)380- | Wireless | T-Mobile Usa |
| (720)381- | Landline | Comcast Ip Phone |
| (720)382- | Landline | Allstream |
| (720)383- | Wireless | Verizon Wireless |
| (720)384- | Landline | Xo Colorado |
| (720)385- | Landline | Xo Colorado |
| (720)386- | Landline | Bandwidth.Com Clec |
| (720)387- | Landline | Level 3 Telecom Of Colorado |
| (720)388- | Wireless | Verizon Wireless |
| (720)389- | Landline | Xo Colorado |
| (720)390- | Wireless | Verizon Wireless |
| (720)391- | Wireless | Verizon Wireless |
| (720)392- | Landline | Ymax Communications |
| (720)393- | Landline | Level 3 Telecom Of Colorado |
| (720)394- | Wireless | T-Mobile Usa |
| (720)395- | Landline | At&T |
| (720)396- | Landline | At&T |
| (720)397- | Landline | At&T |
| (720)398- | Wireless | New Cingular Wireless Pcs |
| (720)399- | Landline | Level 3 Communications |
| (720)400- | Wireless | T-Mobile Usa |
| (720)401- | Wireless | T-Mobile Usa |
| (720)402- | Landline | Allstream |
| (720)403- | Landline | Peerless Network Of Colorado |
| (720)404- | Wireless | New Cingular Wireless Pcs |
| (720)405- | Landline | Intrado Communications |
| (720)406- | Landline | Qwest |
| (720)407- | Landline | Onvoy |
| (720)408- | Landline | Bandwidth.Com Clec |
| (720)409- | Landline | Mcleodusa Telecommunication Services |
| (720)410- | Landline | Comcast Ip Phone |
| (720)412- | Wireless | New Cingular Wireless Pcs |
| (720)413- | Wireless | Verizon Wireless |
| (720)414- | Landline | Level 3 Communications |
| (720)415- | Wireless | Verizon Wireless |
| (720)416- | Landline | Metropcs |
| (720)417- | Landline | Allstream |
| (720)418- | Landline | Mcimetro Access Transmission Services |
| (720)419- | Wireless | T-Mobile Usa |
| (720)420- | Landline | Level 3 Communications |
| (720)421- | Wireless | T-Mobile Usa |
| (720)422- | Wireless | New Cingular Wireless Pcs |
| (720)423- | Landline | Qwest |
| (720)424- | Landline | Qwest |
| (720)425- | Wireless | Verizon Wireless |
| (720)426- | Landline | Qwest |
| (720)427- | Wireless | T-Mobile Usa |
| (720)428- | Landline | Onvoy |
| (720)429- | Wireless | New Cingular Wireless Pcs |
| (720)430- | Landline | At&T |
| (720)431- | Wireless | New Cingular Wireless Pcs |
| (720)432- | Landline | Bandwidth.Com Clec |
| (720)433- | Landline | Qwest |
| (720)434- | Wireless | New Cingular Wireless Pcs |
| (720)435- | Wireless | New Cingular Wireless Pcs |
| (720)436- | Wireless | New Cingular Wireless Pcs |
| (720)437- | Wireless | Verizon Wireless |
| (720)438- | Landline | Onvoy |
| (720)439- | Wireless | New Cingular Wireless Pcs |
| (720)440- | Wireless | New Cingular Wireless Pcs |
| (720)441- | Landline | Bandwidth.Com Clec |
| (720)442- | Landline | Bandwidth.Com Clec |
| (720)443- | Landline | Bandwidth.Com Clec |
| (720)444- | Landline | Qwest |
| (720)445- | Wireless | Verizon Wireless |
| (720)446- | Landline | Xo Colorado |
| (720)447- | Wireless | New Cingular Wireless Pcs |
| (720)448- | Wireless | New Cingular Wireless Pcs |
| (720)449- | Landline | Xo Colorado |
| (720)450- | Landline | Mcimetro Access Transmission Services |
| (720)451- | Wireless | T-Mobile Usa |
| (720)452- | Landline | Peerless Network Of Colorado |
| (720)453- | Wireless | T-Mobile Usa |
| (720)454- | Landline | Mcleodusa Telecommunication Services |
| (720)455- | Landline | Qwest |
| (720)456- | Landline | Level 3 Telecom Of Colorado |
| (720)457- | Landline | Level 3 Communications |
| (720)458- | Landline | Level 3 Telecom Of Colorado |
| (720)459- | Landline | Onvoy |
| (720)460- | Landline | Allstream |
| (720)461- | Landline | Metropcs |
| (720)462- | Landline | Mcimetro Access Transmission Services |
| (720)463- | Landline | Onvoy |
| (720)464- | Landline | Bandwidth.Com Clec |
| (720)465- | Wireless | New Cingular Wireless Pcs |
| (720)466- | Wireless | New Cingular Wireless Pcs |
| (720)467- | Wireless | Verizon Wireless |
| (720)468- | Landline | Level 3 Communications |
| (720)469- | Wireless | New Cingular Wireless Pcs |
| (720)470- | Wireless | Verizon Wireless |
| (720)471- | Wireless | Verizon Wireless |
| (720)472- | Landline | Teleport Communications America |
| (720)473- | Landline | Onvoy |
| (720)474- | Wireless | T-Mobile Usa |
| (720)475- | Landline | Teleport Communications America |
| (720)476- | Wireless | New Cingular Wireless Pcs |
| (720)477- | Landline | Onvoy |
| (720)478- | Landline | Level 3 Telecom Of Colorado |
| (720)479- | Landline | Teleport Communications America |
| (720)480- | Wireless | New Cingular Wireless Pcs |
| (720)481- | Wireless | New Cingular Wireless Pcs |
| (720)482- | Landline | Qwest |
| (720)483- | Wireless | New Cingular Wireless Pcs |
| (720)484- | Landline | Allstream |
| (720)485- | Landline | Comcast Ip Phone |
| (720)486- | Wireless | New Cingular Wireless Pcs |
| (720)487- | Landline | Telnyx |
| (720)488- | Landline | Qwest |
| (720)489- | Landline | Qwest |
| (720)490- | Wireless | T-Mobile Usa |
| (720)491- | Wireless | New Cingular Wireless Pcs |
| (720)492- | Wireless | T-Mobile Usa |
| (720)493- | Landline | Qwest |
| (720)494- | Landline | Qwest |
| (720)495- | Wireless | New Cingular Wireless Pcs |
| (720)496- | Landline | Level 3 Communications |
| (720)497- | Landline | Qwest |
| (720)498- | Wireless | Verizon Wireless |
| (720)499- | Wireless | T-Mobile Usa |
| (720)500- | Landline | Peerless Network Of Colorado |
| (720)501- | Landline | Metropcs |
| (720)502- | Landline | Comcast Ip Phone |
| (720)503- | Wireless | New Cingular Wireless Pcs |
| (720)504- | Landline | Bandwidth.Com Clec |
| (720)505- | Wireless | Verizon Wireless |
| (720)506- | Landline | Level 3 Communications |
| (720)507- | Landline | Bandwidth.Com Clec |
| (720)508- | Landline | Allstream |
| (720)509- | Landline | Xo Colorado |
| (720)510- | Landline | Comcast Ip Phone |
| (720)512- | Landline | Comcast Ip Phone |
| (720)513- | Landline | Onvoy |
| (720)514- | Landline | Teleport Communications America |
| (720)515- | Landline | Bandwidth.Com Clec |
| (720)516- | Landline | Qwest |
| (720)517- | Wireless | New Cingular Wireless Pcs |
| (720)518- | Landline | Allstream |
| (720)519- | Landline | Teleport Communications America |
| (720)520- | Landline | Onvoy Spectrum |
| (720)521- | Landline | American Messaging Services |
| (720)522- | Landline | Xo Colorado |
| (720)523- | Landline | Qwest |
| (720)524- | Landline | Qwest |
| (720)525- | Wireless | T-Mobile Usa |
| (720)526- | Wireless | New Cingular Wireless Pcs |
| (720)527- | Landline | Teliax |
| (720)528- | Landline | Qwest |
| (720)529- | Landline | Qwest |
| (720)530- | Wireless | New Cingular Wireless Pcs |
| (720)531- | Landline | Comcast Ip Phone |
| (720)532- | Landline | Teleport Communications America |
| (720)533- | Landline | Teleport Communications America |
| (720)534- | Landline | Vonage America |
| (720)535- | Landline | Teleport Communications America |
| (720)536- | Landline | Qwest |
| (720)537- | Landline | Fasttrack Communications |
| (720)538- | Wireless | Verizon Wireless |
| (720)539- | Wireless | New Cingular Wireless Pcs |
| (720)540- | Landline | Qwest |
| (720)541- | Wireless | Verizon Wireless |
| (720)542- | Landline | Qwest |
| (720)543- | Landline | Peerless Network Of Colorado |
| (720)544- | Landline | Qwest |
| (720)545- | Landline | Level 3 Communications |
| (720)546- | Wireless | T-Mobile Usa |
| (720)547- | Landline | Bandwidth.Com Clec |
| (720)548- | Landline | Global Crossing Local Services |
| (720)549- | Landline | Level 3 Communications |
| (720)550- | Landline | Mcleodusa Telecommunication Services |
| (720)551- | Wireless | New Cingular Wireless Pcs |
| (720)552- | Wireless | Verizon Wireless |
| (720)553- | Landline | Qwest |
| (720)554- | Landline | Qwest |
| (720)556- | Wireless | Verizon Wireless |
| (720)557- | Wireless | Verizon Wireless |
| (720)558- | Landline | Qwest |
| (720)559- | Landline | Teleport Communications America |
| (720)560- | Wireless | New Cingular Wireless Pcs |
| (720)561- | Landline | Qwest |
| (720)562- | Landline | Qwest |
| (720)563- | Landline | Qwest |
| (720)564- | Landline | Qwest |
| (720)565- | Landline | Qwest |
| (720)566- | Landline | Qwest |
| (720)567- | Landline | Level 3 Communications |
| (720)568- | Landline | Qwest |
| (720)569- | Wireless | New Cingular Wireless Pcs |
| (720)570- | Landline | Qwest |
| (720)571- | Landline | Onvoy |
| (720)572- | Landline | Teleport Communications America |
| (720)573- | Landline | Level 3 Telecom Of Colorado |
| (720)574- | Landline | Bandwidth.Com Clec |
| (720)575- | Landline | Onvoy |
| (720)576- | Wireless | Verizon Wireless |
| (720)577- | Landline | Level 3 Communications |
| (720)578- | Landline | Qwest |
| (720)579- | Landline | Xo Colorado |
| (720)580- | Landline | Bandwidth.Com Clec |
| (720)581- | Wireless | T-Mobile Usa |
| (720)582- | Wireless | Verizon Wireless |
| (720)583- | Landline | Onvoy |
| (720)584- | Wireless | Verizon Wireless |
| (720)585- | Wireless | Commnet Wireless |
| (720)586- | Landline | Metropcs |
| (720)587- | Landline | At&T |
| (720)588- | Landline | Nuso |
| (720)589- | Wireless | T-Mobile Usa |
| (720)590- | Landline | Onvoy |
| (720)591- | Wireless | Verizon Wireless |
| (720)592- | Wireless | T-Mobile Usa |
| (720)593- | Landline | Level 3 Telecom Of Colorado |
| (720)594- | Landline | Airus |
| (720)595- | Landline | Level 3 Communications |
| (720)596- | Landline | Teleport Communications America |
| (720)597- | Wireless | Verizon Wireless |
| (720)598- | Landline | Bandwidth.Com Clec |
| (720)599- | Landline | Allstream |
| (720)600- | Landline | Onvoy |
| (720)601- | Wireless | Verizon Wireless |
| (720)602- | Wireless | T-Mobile Usa |
| (720)603- | Landline | Level 3 Telecom Of Colorado |
| (720)604- | Landline | Bandwidth.Com Clec |
| (720)605- | Landline | Onvoy |
| (720)606- | Wireless | New Cingular Wireless Pcs |
| (720)607- | Wireless | Verizon Wireless |
| (720)608- | Landline | Bandwidth.Com Clec |
| (720)609- | Wireless | New Cingular Wireless Pcs |
| (720)610- | Wireless | Verizon Wireless |
| (720)612- | Wireless | T-Mobile Usa |
| (720)613- | Landline | Mcimetro Access Transmission Services |
| (720)614- | Landline | Airespring |
| (720)615- | Landline | Bandwidth.Com Clec |
| (720)616- | Landline | Level 3 Communications |
| (720)617- | Landline | Mcleodusa Telecommunication Services |
| (720)618- | Wireless | Verizon Wireless |
| (720)619- | Landline | Bandwidth.Com Clec |
| (720)620- | Wireless | New Cingular Wireless Pcs |
| (720)621- | Wireless | New Cingular Wireless Pcs |
| (720)622- | Landline | Qwest |
| (720)623- | Landline | Onvoy |
| (720)624- | Landline | Teleport Communications America |
| (720)625- | Landline | Mcleodusa Telecommunication Services |
| (720)626- | Wireless | Verizon Wireless |
| (720)627- | Landline | Qwest |
| (720)628- | Wireless | New Cingular Wireless Pcs |
| (720)629- | Wireless | New Cingular Wireless Pcs |
| (720)630- | Wireless | New Cingular Wireless Pcs |
| (720)631- | Landline | Mcimetro Access Transmission Services |
| (720)632- | Landline | Teleport Communications America |
| (720)633- | Wireless | New Cingular Wireless Pcs |
| (720)634- | Landline | Mcimetro Access Transmission Services |
| (720)635- | Wireless | New Cingular Wireless Pcs |
| (720)636- | Wireless | Verizon Wireless |
| (720)637- | Landline | Onvoy |
| (720)638- | Landline | Comcast Ip Phone |
| (720)639- | Landline | Onvoy |
| (720)640- | Landline | Level 3 Communications |
| (720)641- | Wireless | T-Mobile Usa |
| (720)642- | Wireless | Verizon Wireless |
| (720)643- | Landline | Level 3 Communications |
| (720)644- | Landline | Mcleodusa Telecommunication Services |
| (720)645- | Wireless | T-Mobile Usa |
| (720)646- | Wireless | New Cingular Wireless Pcs |
| (720)647- | Landline | Onvoy |
| (720)648- | Wireless | Verizon Wireless |
| (720)649- | Landline | Bandwidth.Com Clec |
| (720)650- | Landline | Onvoy |
| (720)651- | Wireless | Verizon Wireless |
| (720)652- | Landline | Qwest |
| (720)653- | Wireless | Verizon Wireless |
| (720)654- | Wireless | New Cingular Wireless Pcs |
| (720)655- | Wireless | T-Mobile Usa |
| (720)656- | Wireless | New Cingular Wireless Pcs |
| (720)657- | Landline | Bandwidth.Com Clec |
| (720)658- | Landline | Telstar Communications |
| (720)659- | Landline | Vonage America |
| (720)660- | Wireless | Verizon Wireless |
| (720)661- | Wireless | Verizon Wireless |
| (720)662- | Wireless | T-Mobile Usa |
| (720)663- | Landline | Bandwidth.Com Clec |
| (720)664- | Landline | Onvoy |
| (720)665- | Wireless | Verizon Wireless |
| (720)666- | Landline | Peerless Network Of Colorado |
| (720)667- | Landline | Comcast Ip Phone |
| (720)668- | Wireless | Verizon Wireless |
| (720)669- | Landline | Onvoy |
| (720)670- | Wireless | Verizon Wireless |
| (720)671- | Wireless | Verizon Wireless |
| (720)672- | Wireless | Verizon Wireless |
| (720)673- | Landline | Exiant Communications |
| (720)674- | Landline | Comcast Ip Phone |
| (720)675- | Wireless | New Cingular Wireless Pcs |
| (720)676- | Landline | Mcimetro Access Transmission Services |
| (720)677- | Landline | Onvoy |
| (720)678- | Wireless | Csc Wireless |
| (720)679- | Landline | Onvoy |
| (720)680- | Wireless | T-Mobile Usa |
| (720)681- | Wireless | T-Mobile Usa |
| (720)682- | Wireless | Verizon Wireless |
| (720)683- | Landline | Bandwidth.Com Clec |
| (720)684- | Landline | Level 3 Communications |
| (720)685- | Landline | Qwest |
| (720)686- | Landline | Xo Colorado |
| (720)687- | Wireless | T-Mobile Usa |
| (720)688- | Wireless | New Cingular Wireless Pcs |
| (720)689- | Landline | Bandwidth.Com Clec |
| (720)690- | Wireless | New Cingular Wireless Pcs |
| (720)691- | Wireless | T-Mobile Usa |
| (720)692- | Landline | Metropcs |
| (720)693- | Wireless | Verizon Wireless |
| (720)694- | Wireless | T-Mobile Usa |
| (720)695- | Landline | Mcimetro Access Transmission Services |
| (720)696- | Landline | Bandwidth.Com Clec |
| (720)697- | Landline | Centurylink Communications |
| (720)698- | Wireless | Verizon Wireless |
| (720)699- | Landline | Onvoy |
| (720)701- | Landline | Teleport Communications America |
| (720)702- | Landline | Onvoy |
| (720)703- | Landline | Nuso |
| (720)704- | Wireless | T-Mobile Usa |
| (720)705- | Wireless | New Cingular Wireless Pcs |
| (720)706- | Landline | Onvoy |
| (720)707- | Landline | Onvoy |
| (720)708- | Landline | Teliax |
| (720)709- | Landline | Mcleodusa Telecommunication Services |
| (720)710- | Landline | Onvoy |
| (720)712- | Landline | Bandwidth.Com Clec |
| (720)713- | Landline | Onvoy |
| (720)714- | Landline | Onvoy |
| (720)715- | Landline | Bandwidth.Com Clec |
| (720)716- | Landline | Level 3 Communications |
| (720)717- | Wireless | New Cingular Wireless Pcs |
| (720)718- | Landline | Qwest |
| (720)721- | Landline | The Voice Application Network |
| (720)722- | Landline | Centurylink Communications |
| (720)723- | Landline | Allstream |
| (720)724- | Landline | Allstream |
| (720)725- | Wireless | T-Mobile Usa |
| (720)726- | Landline | Comcast Ip Phone |
| (720)727- | Landline | Bandwidth.Com Clec |
| (720)728- | Landline | Level 3 Telecom Of Colorado |
| (720)729- | Landline | Bandwidth.Com Clec |
| (720)730- | Landline | Onvoy |
| (720)731- | Landline | Level 3 Communications |
| (720)732- | Wireless | T-Mobile Usa |
| (720)733- | Landline | Qwest |
| (720)734- | Wireless | Commnet Wireless |
| (720)735- | Landline | Onvoy |
| (720)736- | Landline | Onvoy |
| (720)737- | Wireless | Verizon Wireless |
| (720)738- | Landline | Onvoy |
| (720)739- | Landline | Bandwidth.Com Clec |
| (720)740- | Landline | Hd Carrier |
| (720)741- | Landline | Onvoy |
| (720)742- | Wireless | T-Mobile Usa |
| (720)743- | Landline | Bandwidth.Com Clec |
| (720)744- | Landline | Qwest |
| (720)745- | Landline | Level 3 Communications |
| (720)746- | Landline | Qwest |
| (720)747- | Landline | Qwest |
| (720)748- | Landline | Qwest |
| (720)749- | Landline | Peerless Network Of Colorado |
| (720)750- | Wireless | T-Mobile Usa |
| (720)751- | Wireless | T-Mobile Usa |
| (720)752- | Landline | Level 3 Communications |
| (720)753- | Wireless | New Cingular Wireless Pcs |
| (720)754- | Landline | Level 3 Telecom Of Colorado |
| (720)755- | Wireless | T-Mobile Usa |
| (720)756- | Wireless | T-Mobile Usa |
| (720)757- | Wireless | T-Mobile Usa |
| (720)758- | Landline | Centurylink Communications |
| (720)759- | Landline | Pacoptic Networks |
| (720)760- | Landline | Twilio International |
| (720)761- | Landline | Jive Communications |
| (720)762- | Wireless | Verizon Wireless |
| (720)763- | Wireless | New Cingular Wireless Pcs |
| (720)764- | Landline | Onvoy |
| (720)765- | Wireless | Verizon Wireless |
| (720)766- | Landline | Fractel |
| (720)767- | Wireless | T-Mobile Usa |
| (720)768- | Landline | Commio |
| (720)769- | Landline | Vonage America |
| (720)770- | Landline | Bandwidth.Com Clec |
| (720)771- | Wireless | T-Mobile Usa |
| (720)772- | Landline | Allstream |
| (720)773- | Landline | Mcimetro Access Transmission Services |
| (720)774- | Wireless | New Cingular Wireless Pcs |
| (720)775- | Wireless | New Cingular Wireless Pcs |
| (720)776- | Landline | Peerless Network Of Colorado |
| (720)777- | Landline | Qwest |
| (720)778- | Landline | Bandwidth.Com Clec |
| (720)779- | Landline | Bandwidth.Com Clec |
| (720)780- | Landline | Onvoy |
| (720)781- | Wireless | T-Mobile Usa |
| (720)782- | Landline | At&T |
| (720)783- | Landline | Onvoy |
| (720)784- | Landline | Onvoy |
| (720)785- | Landline | Teleport Communications America |
| (720)786- | Wireless | T-Mobile Usa |
| (720)787- | Landline | Pacoptic Networks |
| (720)788- | Wireless | Verizon Wireless |
| (720)789- | Landline | Level 3 Communications |
| (720)790- | Landline | Onvoy |
| (720)791- | Landline | Telnyx |
| (720)792- | Landline | Onvoy |
| (720)793- | Wireless | Verizon Wireless |
| (720)794- | Landline | Onvoy |
| (720)795- | Landline | Centurylink Communications |
| (720)796- | Landline | Nuso |
| (720)797- | Landline | Bandwidth.Com Clec |
| (720)798- | Landline | Bandwidth.Com Clec |
| (720)799- | Landline | Onvoy |
| (720)800- | Landline | Onvoy |
| (720)801- | Landline | Wide Voice |
| (720)802- | Landline | Onvoy |
| (720)803- | Wireless | T-Mobile Usa |
| (720)804- | Landline | Whitesky Communications |
| (720)805- | Landline | Voip Innovations |
| (720)806- | Landline | Peerless Network Of Colorado |
| (720)807- | Landline | Onvoy |
| (720)808- | Landline | Bandwidth.Com Clec |
| (720)809- | Landline | Metropcs |
| (720)810- | Wireless | Verizon Wireless |
| (720)812- | Wireless | Verizon Wireless |
| (720)813- | Landline | Ip Horizon |
| (720)814- | Wireless | Verizon Wireless |
| (720)815- | Landline | Comcast Ip Phone |
| (720)816- | Landline | Onvoy Spectrum |
| (720)817- | Landline | Comcast Ip Phone |
| (720)818- | Wireless | Verizon Wireless |
| (720)819- | Wireless | T-Mobile Usa |
| (720)820- | Landline | Wide Voice |
| (720)821- | Landline | Onvoy |
| (720)822- | Wireless | Verizon Wireless |
| (720)823- | Landline | Whitesky Communications |
| (720)824- | Landline | Vonage America |
| (720)825- | Landline | Wide Voice |
| (720)826- | Landline | Comcast Ip Phone |
| (720)827- | Wireless | T-Mobile Usa |
| (720)828- | Wireless | T-Mobile Usa |
| (720)829- | Landline | Metropcs |
| (720)830- | Landline | Hd Carrier |
| (720)831- | Landline | Teleport Communications America |
| (720)832- | Landline | Onvoy Spectrum |
| (720)833- | Landline | Qwest |
| (720)834- | Landline | Teleport Communications America |
| (720)835- | Wireless | New Cingular Wireless Pcs |
| (720)836- | Landline | Level 3 Communications |
| (720)837- | Wireless | T-Mobile Usa |
| (720)838- | Wireless | T-Mobile Usa |
| (720)839- | Wireless | T-Mobile Usa |
| (720)840- | Wireless | T-Mobile Usa |
| (720)841- | Wireless | T-Mobile Usa |
| (720)842- | Landline | Qwest |
| (720)843- | Landline | Onvoy Spectrum |
| (720)844- | Landline | Leap Telecom |
| (720)845- | Wireless | T-Mobile Usa |
| (720)846- | Wireless | Verizon Wireless |
| (720)847- | Landline | Qwest |
| (720)848- | Landline | Qwest |
| (720)849- | Wireless | T-Mobile Usa |
| (720)850- | Landline | Five9 |
| (720)851- | Landline | Qwest |
| (720)852- | Landline | Qwest |
| (720)853- | Landline | Bandwidth.Com Clec |
| (720)854- | Landline | Qwest |
| (720)855- | Landline | Qwest |
| (720)856- | Landline | Onvoy |
| (720)857- | Landline | Qwest |
| (720)858- | Landline | Qwest |
| (720)859- | Landline | Qwest |
| (720)860- | Landline | Onvoy Spectrum |
| (720)861- | Landline | Bandwidth.Com Clec |
| (720)862- | Landline | Xo Colorado |
| (720)863- | Landline | Xo Colorado |
| (720)864- | Landline | Qwest |
| (720)865- | Landline | Level 3 Communications |
| (720)866- | Landline | Terra Nova Telecom |
| (720)868- | Landline | Onvoy |
| (720)869- | Wireless | New Cingular Wireless Pcs |
| (720)870- | Landline | Qwest |
| (720)871- | Wireless | T-Mobile Usa |
| (720)872- | Landline | Qwest |
| (720)873- | Landline | Qwest |
| (720)874- | Landline | Qwest |
| (720)875- | Landline | Qwest |
| (720)876- | Landline | Qwest |
| (720)877- | Landline | Level 3 Communications |
| (720)878- | Wireless | New Cingular Wireless Pcs |
| (720)879- | Landline | Level 3 Communications |
| (720)880- | Wireless | Verizon Wireless |
| (720)881- | Landline | Bandwidth.Com Clec |
| (720)882- | Wireless | New Cingular Wireless Pcs |
| (720)883- | Landline | Level 3 Communications |
| (720)884- | Landline | Qwest |
| (720)885- | Wireless | New Cingular Wireless Pcs |
| (720)886- | Landline | Qwest |
| (720)887- | Landline | Qwest |
| (720)888- | Landline | Level 3 Communications |
| (720)889- | Landline | Xo Colorado |
| (720)890- | Landline | Qwest |
| (720)891- | Landline | Level 3 Communications |
| (720)892- | Landline | Bandwidth.Com Clec |
| (720)893- | Landline | Bandwidth.Com Clec |
| (720)894- | Landline | Bandwidth.Com Clec |
| (720)895- | Landline | Qwest |
| (720)896- | Wireless | T-Mobile Usa |
| (720)897- | Landline | Global Crossing Local Services |
| (720)898- | Landline | Qwest |
| (720)899- | Wireless | Verizon Wireless |
| (720)900- | Landline | Peerless Network Of Colorado |
| (720)901- | Landline | Telnyx |
| (720)902- | Wireless | Verizon Wireless |
| (720)903- | Landline | Global Crossing Local Services |
| (720)904- | Landline | Qwest |
| (720)905- | Landline | Five9 |
| (720)906- | Landline | Comcast Ip Phone |
| (720)907- | Landline | Global Crossing Local Services |
| (720)908- | Wireless | Verizon Wireless |
| (720)909- | Landline | Bandwidth.Com Clec |
| (720)910- | Wireless | Verizon Wireless |
| (720)912- | Landline | Onvoy |
| (720)913- | Landline | Level 3 Communications |
| (720)914- | Landline | Onvoy |
| (720)915- | Landline | Vonage America |
| (720)916- | Wireless | Verizon Wireless |
| (720)917- | Landline | Qwest |
| (720)918- | Landline | Vonage America |
| (720)919- | Wireless | T-Mobile Usa |
| (720)920- | Landline | Teleport Communications America |
| (720)921- | Landline | Level 3 Communications |
| (720)922- | Landline | Qwest |
| (720)923- | Landline | Advanced Telecom Solutions |
| (720)924- | Landline | Qwest |
| (720)925- | Landline | Comcast Ip Phone |
| (720)926- | Wireless | Verizon Wireless |
| (720)927- | Landline | Bandwidth.Com Clec |
| (720)928- | Landline | Bandwidth.Com Clec |
| (720)929- | Landline | Qwest |
| (720)930- | Landline | Rclec |
| (720)931- | Landline | Qwest |
| (720)932- | Landline | Qwest |
| (720)933- | Wireless | T-Mobile Usa |
| (720)934- | Wireless | T-Mobile Usa |
| (720)935- | Wireless | T-Mobile Usa |
| (720)936- | Wireless | T-Mobile Usa |
| (720)937- | Wireless | T-Mobile Usa |
| (720)938- | Wireless | T-Mobile Usa |
| (720)939- | Wireless | T-Mobile Usa |
| (720)940- | Wireless | T-Mobile Usa |
| (720)941- | Landline | Qwest |
| (720)942- | Landline | Qwest |
| (720)943- | Landline | Global Crossing Local Services |
| (720)944- | Landline | Qwest |
| (720)945- | Landline | Qwest |
| (720)946- | Landline | Qwest |
| (720)947- | Landline | Qwest |
| (720)948- | Wireless | Verizon Wireless |
| (720)949- | Landline | Teleport Communications America |
| (720)951- | Wireless | Verizon Wireless |
| (720)952- | Landline | Vonage America |
| (720)953- | Wireless | T-Mobile Usa |
| (720)954- | Wireless | Verizon Wireless |
| (720)955- | Wireless | Verizon Wireless |
| (720)956- | Landline | Qwest |
| (720)957- | Wireless | T-Mobile Usa |
| (720)960- | Wireless | New Cingular Wireless Pcs |
| (720)961- | Landline | Level 3 Communications |
| (720)962- | Landline | Qwest |
| (720)963- | Landline | Qwest |
| (720)964- | Wireless | T-Mobile Usa |
| (720)965- | Wireless | T-Mobile Usa |
| (720)966- | Wireless | New Cingular Wireless Pcs |
| (720)967- | Landline | Leap Telecom |
| (720)968- | Wireless | New Cingular Wireless Pcs |
| (720)969- | Wireless | New Cingular Wireless Pcs |
| (720)971- | Wireless | T-Mobile Usa |
| (720)972- | Landline | Qwest |
| (720)973- | Landline | Hadlo Technologies |
| (720)974- | Landline | Allstream |
| (720)975- | Landline | Allstream |
| (720)977- | Landline | Qwest |
| (720)978- | Landline | Nuso |
| (720)979- | Wireless | T-Mobile Usa |
| (720)980- | Wireless | T-Mobile Usa |
| (720)981- | Landline | Qwest |
| (720)982- | Wireless | T-Mobile Usa |
| (720)984- | Wireless | T-Mobile Usa |
| (720)985- | Wireless | T-Mobile Usa |
| (720)986- | Landline | Bandwidth.Com Clec |
| (720)987- | Wireless | T-Mobile Usa |
| (720)988- | Wireless | T-Mobile Usa |
| (720)989- | Wireless | T-Mobile Usa |
| (720)990- | Landline | Level 3 Telecom Of Colorado |
| (720)991- | Landline | Commio |
| (720)992- | Landline | Teleport Communications America |
| (720)993- | Wireless | New Cingular Wireless Pcs |
| (720)994- | Wireless | T-Mobile Usa |
| (720)995- | Landline | Eon Telecom |
| (720)996- | Landline | Commio |
| (720)997- | Landline | Comcast Ip Phone |
| (720)998- | Landline | Comcast Ip Phone |
| (720)999- | Wireless | T-Mobile Usa |
| No prefixes match “”. | ||
Frequently Asked Questions about the 720 Area Code
Who called me from a 720 number?
A 720 number is assigned to Denver, Colorado, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 720 code to look nearby, so a 720 number doesn't prove the caller is local. Recently, 2,091 unwanted-call complaints were reported to the FTC for numbers showing the 720 code (50% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 720 a scam area code?
No area code is a scam on its own. 720 is a normal, officially assigned code for Denver, Colorado. Spam callers spoof local codes to raise the odds you answer, so 720 on your caller ID says nothing about who is really calling. Recently, 2,091 unwanted-call complaints were reported to the FTC for numbers showing the 720 code (50% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 720 area code?
Repeated calls from different 720 numbers are usually spoofing: a robocaller rotates through 720 numbers so each call looks local and slips past simple blocks. Recently, 2,091 unwanted-call complaints were reported to the FTC for numbers showing the 720 code (50% 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 720 number?
If you aren't expecting a 720 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 720 area code?
Block a single 720 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 720 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 720?
Area code 720 covers Denver and the surrounding area in Colorado, spanning 137 cities with about 3,380,487 residents. It shares its area with overlay codes 303, 983.
When did area code 720 go into service?
Area code 720 went into service on June 1, 1998. It was added as an overlay of 303, so 720 numbers serve the same area that 303 already covered.
Is 720 a real area code?
Yes. 720 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Denver, Colorado. A real code can still show up on spoofed spam calls, so treat unknown 720 calls with normal caution.
What timezone is the 720 area code in?
The 720 area code is in the Mountain Time (MT). Because a number can be kept when someone moves or switches to VoIP, a specific 720 caller may not be in that zone.
How do I call a 720 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 720 and the seven-digit number. From a mobile phone you can usually just enter +1 720 followed by the number and let the phone add the exit code for you.