779 Area CodeRockford, IL
Area code 779 covers Rockford and nearby communities in Illinois, in the Central Time (CT) zone, home to about 1,697,555 people across 275 cities. It was added in 2007 as an overlay of 815, so the same region uses both codes and every local call needs all ten digits.
Where is area code 779?
Area code 779 serves part of Rockford, IL and the surrounding areas. It has a single overlay (815) that serves the same area.
Overview of the 779 Area Code
What is the 779 area code?
The 779 area code serves Rockford, Illinois, alongside other established area codes. When you see a 779 number, it indicates a local number within this geographic area.
Why was area code 779 created?
Area code 779 went into service on March 17, 2007, as an overlay of 815. An overlay adds a second code to the same territory instead of splitting it: existing 815 numbers kept their digits, new lines began receiving 779 numbers, and local calls in the region require all ten digits.
Geographic Coverage of the 779 Area Code
The 779 area code serves Rockford and surrounding areas in Illinois. It operates within the Central Time (CT) time zone. It complements the coverage of area code 815. This area code covers several key cities, including:
- Joliet
- Rockford
- Bolingbrook
- Tinley Park
- Plainfield
- Crystal Lake
Got a call from a 779 number? It came from Rockford, IL. Since 779 overlays with 815, every local call in the region needs all ten digits to land on the right line. Of the listed cities' population, Rockford accounts for about 9.8%; the rest is split across 274 smaller cities.
Rockford Area Codes Overview
Rockford is served by multiple area codes, reflecting its telecommunications needs. The 779 area code operates alongside 815. Here are the area codes serving this region:
The introduction of the 779 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 779 cover?
| City | State | Population | Population in 779 | % of listed-city population | % of City |
|---|---|---|---|---|---|
| Joliet | IL | 151,837 | 151,837 | 9.8% | 100.0% |
| Rockford | IL | 147,486 | 147,486 | 9.5% | 100.0% |
| Bolingbrook | IL | 74,756 | 6,468 | 4.8% | 8.7% |
| Tinley Park | IL | 54,856 | 0 | 3.6% | 0.0% |
| Plainfield | IL | 48,881 | 41,896 | 3.2% | 85.7% |
| Crystal Lake | IL | 41,513 | 35,874 | 2.7% | 86.4% |
| Romeoville | IL | 41,177 | 36,567 | 2.7% | 88.8% |
| DeKalb | IL | 40,491 | 40,491 | 2.6% | 100.0% |
| McHenry | IL | 28,825 | 28,825 | 1.9% | 100.0% |
| New Lenox | IL | 28,480 | 28,480 | 1.8% | 100.0% |
| Lockport | IL | 26,915 | 26,915 | 1.7% | 100.0% |
| Woodstock | IL | 25,892 | 25,892 | 1.7% | 100.0% |
| Belvidere | IL | 25,325 | 25,325 | 1.6% | 100.0% |
| Homer Glen | IL | 24,852 | 0 | 1.6% | 0.0% |
| Loves Park | IL | 23,636 | 23,636 | 1.5% | 100.0% |
| Kankakee | IL | 23,535 | 23,535 | 1.5% | 100.0% |
| Freeport | IL | 23,140 | 23,140 | 1.5% | 100.0% |
| Machesney Park | IL | 22,839 | 22,839 | 1.5% | 100.0% |
| Frankfort | IL | 21,160 | 21,160 | 1.4% | 100.0% |
| Crest Hill | IL | 20,223 | 20,223 | 1.3% | 100.0% |
| Mokena | IL | 19,915 | 0 | 1.3% | 0.0% |
| Sycamore | IL | 18,968 | 18,968 | 1.2% | 100.0% |
| Ottawa | IL | 18,775 | 18,775 | 1.2% | 100.0% |
| Shorewood | IL | 18,522 | 18,522 | 1.2% | 100.0% |
| Bourbonnais | IL | 18,083 | 18,083 | 1.2% | 100.0% |
| Bradley | IL | 15,298 | 15,298 | 1.0% | 100.0% |
| Dixon | IL | 15,156 | 15,156 | 1.0% | 100.0% |
| Morris | IL | 14,587 | 14,587 | 0.9% | 100.0% |
| Sterling | IL | 14,535 | 14,535 | 0.9% | 100.0% |
| Channahon | IL | 14,392 | 14,392 | 0.9% | 100.0% |
| Minooka | IL | 12,907 | 12,907 | 0.8% | 100.0% |
| Streator | IL | 12,295 | 12,295 | 0.8% | 100.0% |
| Pontiac | IL | 11,054 | 11,054 | 0.7% | 100.0% |
| Roscoe | IL | 10,981 | 10,981 | 0.7% | 100.0% |
| Fox Lake | IL | 10,925 | 0 | 0.7% | 0.0% |
| Manhattan | IL | 10,772 | 10,772 | 0.7% | 100.0% |
| Peru | IL | 9,793 | 9,793 | 0.6% | 100.0% |
| Rochelle | IL | 9,510 | 9,510 | 0.6% | 100.0% |
| LaSalle | IL | 9,424 | 9,424 | 0.6% | 100.0% |
| Harvard | IL | 9,408 | 9,408 | 0.6% | 100.0% |
| Frankfort Square | IL | 9,276 | 9,276 | 0.6% | 100.0% |
| Manteno | IL | 9,241 | 9,241 | 0.6% | 100.0% |
| Rock Falls | IL | 8,614 | 8,614 | 0.6% | 100.0% |
| Island Lake | IL | 8,066 | 0 | 0.5% | 0.0% |
| South Beloit | IL | 7,983 | 7,983 | 0.5% | 100.0% |
| Rockton | IL | 7,861 | 7,861 | 0.5% | 100.0% |
| Marengo | IL | 7,699 | 7,699 | 0.5% | 100.0% |
| Princeton | IL | 7,667 | 7,667 | 0.5% | 100.0% |
| Volo | IL | 7,361 | 0 | 0.5% | 0.0% |
| Sandwich | IL | 7,299 | 7,299 | 0.5% | 100.0% |
| Mendota | IL | 6,922 | 6,922 | 0.5% | 100.0% |
| Lakemoor | IL | 6,451 | 0 | 0.4% | 0.0% |
| Johnsburg | IL | 6,428 | 6,428 | 0.4% | 100.0% |
| Braidwood | IL | 6,245 | 6,245 | 0.4% | 100.0% |
| Coal City | IL | 5,810 | 5,810 | 0.4% | 100.0% |
| Wilmington | IL | 5,629 | 5,629 | 0.4% | 100.0% |
| Spring Grove | IL | 5,554 | 5,554 | 0.4% | 100.0% |
| Genoa | IL | 5,514 | 5,514 | 0.4% | 100.0% |
| Spring Valley | IL | 5,404 | 5,404 | 0.4% | 100.0% |
| Wonder Lake | IL | 5,296 | 5,296 | 0.3% | 100.0% |
| Poplar Grove | IL | 5,165 | 5,165 | 0.3% | 100.0% |
| Marseilles | IL | 4,779 | 4,779 | 0.3% | 100.0% |
| Lake Holiday | IL | 4,761 | 4,761 | 0.3% | 100.0% |
| Cortland | IL | 4,592 | 4,592 | 0.3% | 100.0% |
| Watseka | IL | 4,495 | 4,495 | 0.3% | 100.0% |
| Lakewood | IL | 4,287 | 4,287 | 0.3% | 100.0% |
| Dwight | IL | 4,032 | 4,032 | 0.3% | 100.0% |
| Morrison | IL | 3,988 | 3,988 | 0.3% | 100.0% |
| Byron | IL | 3,764 | 3,764 | 0.2% | 100.0% |
| Oglesby | IL | 3,626 | 3,626 | 0.2% | 100.0% |
| Fulton | IL | 3,581 | 3,581 | 0.2% | 100.0% |
| Fairbury | IL | 3,571 | 3,571 | 0.2% | 100.0% |
| Oregon | IL | 3,570 | 3,570 | 0.2% | 100.0% |
| Pistakee Highlands | IL | 3,454 | 0 | 0.2% | 0.0% |
| Ingalls Park | IL | 3,314 | 3,314 | 0.2% | 100.0% |
| Galena | IL | 3,207 | 3,207 | 0.2% | 100.0% |
| Momence | IL | 3,169 | 3,169 | 0.2% | 100.0% |
| Winnebago | IL | 2,907 | 2,907 | 0.2% | 100.0% |
| Cherry Valley | IL | 2,888 | 2,888 | 0.2% | 100.0% |
| Mount Morris | IL | 2,792 | 2,792 | 0.2% | 100.0% |
| Savanna | IL | 2,713 | 2,713 | 0.2% | 100.0% |
| Diamond | IL | 2,702 | 2,702 | 0.2% | 100.0% |
| Lena | IL | 2,666 | 2,666 | 0.2% | 100.0% |
| Preston Heights | IL | 2,575 | 2,575 | 0.2% | 100.0% |
| Davis Junction | IL | 2,534 | 2,534 | 0.2% | 100.0% |
| Fairmont | IL | 2,459 | 2,459 | 0.2% | 100.0% |
| Sheridan | IL | 2,413 | 2,413 | 0.2% | 100.0% |
| Seneca | IL | 2,310 | 2,310 | 0.2% | 100.0% |
| Elwood | IL | 2,248 | 2,248 | 0.2% | 100.0% |
| Polo | IL | 2,238 | 2,238 | 0.2% | 100.0% |
| Amboy | IL | 2,224 | 2,224 | 0.1% | 100.0% |
| Richmond | IL | 2,123 | 2,123 | 0.1% | 100.0% |
| Pecatonica | IL | 2,058 | 2,058 | 0.1% | 100.0% |
| Lake Summerset | IL | 2,048 | 2,048 | 0.1% | 100.0% |
| Rockdale | IL | 1,980 | 1,980 | 0.1% | 100.0% |
| Hinckley | IL | 1,976 | 1,976 | 0.1% | 100.0% |
| Prairie Grove | IL | 1,951 | 1,951 | 0.1% | 100.0% |
| Prophetstown | IL | 1,906 | 1,906 | 0.1% | 100.0% |
| Crystal Lawns | IL | 1,872 | 1,872 | 0.1% | 100.0% |
| Somonauk | IL | 1,761 | 1,761 | 0.1% | 100.0% |
| Chenoa | IL | 1,699 | 1,699 | 0.1% | 100.0% |
| Gilman | IL | 1,674 | 1,674 | 0.1% | 100.0% |
| Stockton | IL | 1,668 | 1,668 | 0.1% | 100.0% |
| Kirkland | IL | 1,621 | 1,621 | 0.1% | 100.0% |
| Earlville | IL | 1,598 | 1,598 | 0.1% | 100.0% |
| Thomson | IL | 1,595 | 1,595 | 0.1% | 100.0% |
| De Pue | IL | 1,573 | 1,573 | 0.1% | 100.0% |
| Waterman | IL | 1,543 | 1,543 | 0.1% | 100.0% |
| Limestone | IL | 1,524 | 1,524 | 0.1% | 100.0% |
| Herscher | IL | 1,493 | 1,493 | 0.1% | 100.0% |
| Maple Park | IL | 1,482 | 1,482 | 0.1% | 100.0% |
| Lanark | IL | 1,463 | 1,463 | 0.1% | 100.0% |
| East Dubuque | IL | 1,457 | 1,457 | 0.1% | 100.0% |
| Mount Carroll | IL | 1,433 | 1,433 | 0.1% | 100.0% |
| Forreston | IL | 1,403 | 1,403 | 0.1% | 100.0% |
| Capron | IL | 1,402 | 1,402 | 0.1% | 100.0% |
| Hebron | IL | 1,396 | 1,396 | 0.1% | 100.0% |
| Ladd | IL | 1,387 | 1,387 | 0.1% | 100.0% |
| Durand | IL | 1,383 | 1,383 | 0.1% | 100.0% |
| Gardner | IL | 1,366 | 1,366 | 0.1% | 100.0% |
| Lakewood Shores | IL | 1,347 | 1,347 | 0.1% | 100.0% |
| North Utica | IL | 1,343 | 1,343 | 0.1% | 100.0% |
| Granville | IL | 1,331 | 1,331 | 0.1% | 100.0% |
| Toluca | IL | 1,321 | 1,321 | 0.1% | 100.0% |
| Clifton | IL | 1,295 | 1,295 | 0.1% | 100.0% |
| Onarga | IL | 1,294 | 1,294 | 0.1% | 100.0% |
| Grant Park | IL | 1,282 | 1,282 | 0.1% | 100.0% |
| Warren | IL | 1,276 | 1,276 | 0.1% | 100.0% |
| Walnut | IL | 1,265 | 1,265 | 0.1% | 100.0% |
| Hillcrest | IL | 1,206 | 1,206 | 0.1% | 100.0% |
| Chatsworth | IL | 1,162 | 1,162 | 0.1% | 100.0% |
| Malta | IL | 1,137 | 1,137 | 0.1% | 100.0% |
| Bull Valley | IL | 1,136 | 1,136 | 0.1% | 100.0% |
| St. Anne | IL | 1,130 | 1,130 | 0.1% | 100.0% |
| Milford | IL | 1,111 | 1,111 | 0.1% | 100.0% |
| Kingston | IL | 1,095 | 1,095 | 0.1% | 100.0% |
| The Galena Territory | IL | 1,058 | 1,058 | 0.1% | 100.0% |
| Stillman Valley | IL | 1,052 | 1,052 | 0.1% | 100.0% |
| Flanagan | IL | 1,023 | 1,023 | 0.1% | 100.0% |
| Forrest | IL | 1,019 | 1,019 | 0.1% | 100.0% |
| Chebanse | IL | 1,011 | 1,011 | 0.1% | 100.0% |
| Milledgeville | IL | 992 | 992 | 0.1% | 100.0% |
| Odell | IL | 983 | 983 | 0.1% | 100.0% |
| Mazon | IL | 982 | 982 | 0.1% | 100.0% |
| Newark | IL | 980 | 980 | 0.1% | 100.0% |
| McCullom Lake | IL | 968 | 968 | 0.1% | 100.0% |
| Wenona | IL | 955 | 955 | 0.1% | 100.0% |
| Ashton | IL | 939 | 939 | 0.1% | 100.0% |
| Sheldon | IL | 930 | 930 | 0.1% | 100.0% |
| Leland | IL | 928 | 928 | 0.1% | 100.0% |
| Timberlane | IL | 902 | 902 | 0.1% | 100.0% |
| Franklin Grove | IL | 876 | 876 | 0.1% | 100.0% |
| Wyanet | IL | 858 | 858 | 0.1% | 100.0% |
| Essex | IL | 853 | 853 | 0.1% | 100.0% |
| Shabbona | IL | 852 | 852 | 0.1% | 100.0% |
| Shannon | IL | 841 | 841 | 0.1% | 100.0% |
| Ringwood | IL | 837 | 837 | 0.1% | 100.0% |
| Hanover | IL | 828 | 828 | 0.1% | 100.0% |
| New Milford | IL | 807 | 807 | 0.1% | 100.0% |
| Paw Paw | IL | 806 | 806 | 0.1% | 100.0% |
| Sheffield | IL | 798 | 798 | 0.1% | 100.0% |
| Cissna Park | IL | 778 | 778 | 0.1% | 100.0% |
| Pearl City | IL | 756 | 756 | 0.1% | 100.0% |
| Hennepin | IL | 747 | 747 | 0.1% | 100.0% |
| Orangeville | IL | 739 | 739 | 0.1% | 100.0% |
| Piper City | IL | 737 | 737 | 0.1% | 100.0% |
| Tonica | IL | 736 | 736 | 0.1% | 100.0% |
| Braceville | IL | 722 | 722 | 0.1% | 100.0% |
| Ashkum | IL | 716 | 716 | 0.1% | 100.0% |
| South Wilmington | IL | 715 | 715 | 0.1% | 100.0% |
| Tiskilwa | IL | 714 | 714 | 0.1% | 100.0% |
| Lost Nation | IL | 708 | 708 | 0.1% | 100.0% |
| Union | IL | 690 | 690 | 0.1% | 100.0% |
| Elizabeth | IL | 688 | 688 | 0.1% | 100.0% |
| Tampico | IL | 675 | 675 | 0.0% | 100.0% |
| La Moille | IL | 670 | 670 | 0.0% | 100.0% |
| Aroma Park | IL | 653 | 653 | 0.0% | 100.0% |
| Cedarville | IL | 645 | 645 | 0.0% | 100.0% |
| Dalzell | IL | 643 | 643 | 0.0% | 100.0% |
| Godley | IL | 634 | 634 | 0.0% | 100.0% |
| Hopkins Park | IL | 625 | 625 | 0.0% | 100.0% |
| Millington | IL | 624 | 624 | 0.0% | 100.0% |
| Creston | IL | 618 | 618 | 0.0% | 100.0% |
| Holiday Hills | IL | 606 | 606 | 0.0% | 100.0% |
| Danforth | IL | 570 | 570 | 0.0% | 100.0% |
| Davis | IL | 568 | 568 | 0.0% | 100.0% |
| Como | IL | 567 | 567 | 0.0% | 100.0% |
| Apple Canyon Lake | IL | 558 | 558 | 0.0% | 100.0% |
| Dayton | IL | 537 | 537 | 0.0% | 100.0% |
| Lyndon | IL | 529 | 529 | 0.0% | 100.0% |
| Crescent City | IL | 528 | 528 | 0.0% | 100.0% |
| Grand Ridge | IL | 508 | 508 | 0.0% | 100.0% |
| Mark | IL | 507 | 507 | 0.0% | 100.0% |
| Cullom | IL | 506 | 506 | 0.0% | 100.0% |
| Dakota | IL | 479 | 479 | 0.0% | 100.0% |
| Chadwick | IL | 476 | 476 | 0.0% | 100.0% |
| Ohio | IL | 458 | 458 | 0.0% | 100.0% |
| Sun River Terrace | IL | 450 | 450 | 0.0% | 100.0% |
| Cornell | IL | 441 | 441 | 0.0% | 100.0% |
| Lostant | IL | 430 | 430 | 0.0% | 100.0% |
| Grand Detour | IL | 429 | 429 | 0.0% | 100.0% |
| Cherry | IL | 420 | 420 | 0.0% | 100.0% |
| Leaf River | IL | 419 | 419 | 0.0% | 100.0% |
| Scales Mound | IL | 419 | 419 | 0.0% | 100.0% |
| German Valley | IL | 417 | 417 | 0.0% | 100.0% |
| Naplate | IL | 414 | 414 | 0.0% | 100.0% |
| Saunemin | IL | 406 | 406 | 0.0% | 100.0% |
| Monroe Center | IL | 406 | 406 | 0.0% | 100.0% |
| Carbon Hill | IL | 383 | 383 | 0.0% | 100.0% |
| Sublette | IL | 372 | 372 | 0.0% | 100.0% |
| Garden Prairie | IL | 352 | 352 | 0.0% | 100.0% |
| Bonfield | IL | 342 | 342 | 0.0% | 100.0% |
| Apple River | IL | 333 | 333 | 0.0% | 100.0% |
| Martinton | IL | 321 | 321 | 0.0% | 100.0% |
| Greenwood | IL | 316 | 316 | 0.0% | 100.0% |
| Seatonville | IL | 312 | 312 | 0.0% | 100.0% |
| Malden | IL | 310 | 310 | 0.0% | 100.0% |
| Ransom | IL | 309 | 309 | 0.0% | 100.0% |
| Lee | IL | 308 | 308 | 0.0% | 100.0% |
| Chemung | IL | 308 | 308 | 0.0% | 100.0% |
| Beaverville | IL | 292 | 292 | 0.0% | 100.0% |
| Manlius | IL | 290 | 290 | 0.0% | 100.0% |
| Rock City | IL | 287 | 287 | 0.0% | 100.0% |
| Millbrook | IL | 282 | 282 | 0.0% | 100.0% |
| Bureau Junction | IL | 278 | 278 | 0.0% | 100.0% |
| Lisbon | IL | 274 | 274 | 0.0% | 100.0% |
| McNabb | IL | 274 | 274 | 0.0% | 100.0% |
| Winslow | IL | 270 | 270 | 0.0% | 100.0% |
| Compton | IL | 266 | 266 | 0.0% | 100.0% |
| Cedar Point | IL | 261 | 261 | 0.0% | 100.0% |
| Rutland | IL | 255 | 255 | 0.0% | 100.0% |
| Magnolia | IL | 254 | 254 | 0.0% | 100.0% |
| Donovan | IL | 238 | 238 | 0.0% | 100.0% |
| Buckingham | IL | 238 | 238 | 0.0% | 100.0% |
| Woodland | IL | 237 | 237 | 0.0% | 100.0% |
| Cabery | IL | 233 | 233 | 0.0% | 100.0% |
| Kangley | IL | 229 | 229 | 0.0% | 100.0% |
| Steward | IL | 223 | 223 | 0.0% | 100.0% |
| Standard | IL | 222 | 222 | 0.0% | 100.0% |
| Troy Grove | IL | 222 | 222 | 0.0% | 100.0% |
| Plattville | IL | 221 | 221 | 0.0% | 100.0% |
| Sammons Point | IL | 215 | 215 | 0.0% | 100.0% |
| Verona | IL | 207 | 207 | 0.0% | 100.0% |
| Menominee | IL | 206 | 206 | 0.0% | 100.0% |
| Thawville | IL | 205 | 0 | 0.0% | 0.0% |
| Long Point | IL | 199 | 199 | 0.0% | 100.0% |
| Reddick | IL | 195 | 195 | 0.0% | 100.0% |
| Wellington | IL | 195 | 195 | 0.0% | 100.0% |
| Caledonia | IL | 182 | 182 | 0.0% | 100.0% |
| Kempton | IL | 177 | 177 | 0.0% | 100.0% |
| Hooppole | IL | 173 | 173 | 0.0% | 100.0% |
| Arlington | IL | 165 | 165 | 0.0% | 100.0% |
| Coleta | IL | 161 | 161 | 0.0% | 100.0% |
| Dana | IL | 157 | 157 | 0.0% | 100.0% |
| Campus | IL | 140 | 140 | 0.0% | 100.0% |
| Dover | IL | 133 | 133 | 0.0% | 100.0% |
| Iroquois | IL | 131 | 131 | 0.0% | 100.0% |
| Papineau | IL | 130 | 130 | 0.0% | 100.0% |
| West Brooklyn | IL | 128 | 128 | 0.0% | 100.0% |
| Nelson | IL | 125 | 125 | 0.0% | 100.0% |
| Symerton | IL | 124 | 124 | 0.0% | 100.0% |
| Ridott | IL | 123 | 123 | 0.0% | 100.0% |
| Leonore | IL | 121 | 121 | 0.0% | 100.0% |
| Harmon | IL | 117 | 117 | 0.0% | 100.0% |
| Nora | IL | 110 | 110 | 0.0% | 100.0% |
| Strawn | IL | 102 | 102 | 0.0% | 100.0% |
| Emington | IL | 99 | 99 | 0.0% | 100.0% |
| Kinsman | IL | 87 | 87 | 0.0% | 100.0% |
| East Brooklyn | IL | 79 | 79 | 0.0% | 100.0% |
| Adeline | IL | 75 | 75 | 0.0% | 100.0% |
| New Bedford | IL | 75 | 75 | 0.0% | 100.0% |
| Irwin | IL | 67 | 67 | 0.0% | 100.0% |
| Union Hill | IL | 52 | 52 | 0.0% | 100.0% |
| Hollowayville | IL | 44 | 44 | 0.0% | 100.0% |
| Deer Grove | IL | 39 | 39 | 0.0% | 100.0% |
City population is shown in full. The share of each city inside 779 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 779 cover?
1,697,555 residents across 23 counties, counted inside the 779 boundary — a county split between codes contributes only its part.
| County | State | Population in 779 | % of area-code footprint | % of County |
|---|---|---|---|---|
| Will County | IL | 451,500 | 27% | 65% |
| Winnebago County | IL | 285,350 | 17% | 100% |
| McHenry County | IL | 185,107 | 11% | 60% |
| LaSalle County | IL | 109,658 | 6% | 100% |
| Kankakee County | IL | 107,502 | 6% | 100% |
| DeKalb County | IL | 100,420 | 6% | 100% |
| Boone County | IL | 53,448 | 3% | 100% |
| Grundy County | IL | 52,533 | 3% | 100% |
| Ogle County | IL | 51,788 | 3% | 100% |
| Whiteside County | IL | 48,648 | 3% | 87% |
| Stephenson County | IL | 44,630 | 3% | 100% |
| Livingston County | IL | 35,815 | 2% | 100% |
| Lee County | IL | 34,145 | 2% | 100% |
| Bureau County | IL | 30,529 | 2% | 92% |
| Iroquois County | IL | 24,325 | 1% | 90% |
| Jo Daviess County | IL | 22,035 | 1% | 100% |
| Kendall County | IL | 19,939 | 1% | 15% |
| Carroll County | IL | 15,702 | 1% | 100% |
| Cook County | IL | 10,072 | 1% | 0% |
| Putnam County | IL | 5,637 | 0% | 100% |
| McLean County | IL | 4,981 | 0% | 3% |
| Marshall County | IL | 2,046 | 0% | 17% |
| Ford County | IL | 1,745 | 0% | 13% |
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 779 been reported for unwanted calls?
Yes – 287 unwanted-call complaints were reported to the FTC for numbers showing a 779 area code (May 29 – Aug 14, 2026).
- 67% robocalls
- ↑ 47% vs prior period
Most-reported subjects
- Other39%113
- Calls pretending to be government, businesses, or family and friends29%82
- Reducing your debt (credit cards, mortgage, student loans)9%25
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 779?
27% assigned to a telco
- 79% Landline
- 21% Wireless
- 0% Unknown
of 273 | ||
| Prefix | Usage | Carrier |
|---|---|---|
| (779)200- | Wireless | Verizon Wireless |
| (779)201- | Wireless | Verizon Wireless |
| (779)202- | Landline | Teleport Communications America |
| (779)203- | Wireless | Sprint Spectrum |
| (779)204- | Landline | Onvoy |
| (779)205- | Wireless | New Cingular Wireless Pcs |
| (779)206- | Wireless | Verizon Wireless |
| (779)207- | Wireless | Verizon Wireless |
| (779)208- | Wireless | Verizon Wireless |
| (779)209- | Landline | Peerless Network Of Illinois |
| (779)210- | Landline | At&T |
| (779)212- | Landline | Nuso |
| (779)213- | Landline | Peerless Network Of Illinois |
| (779)214- | Landline | Mediacom Telephony Of Illinois |
| (779)215- | Landline | Ip Horizon |
| (779)216- | Landline | Peerless Network Of Illinois |
| (779)218- | Landline | Peerless Network Of Illinois |
| (779)220- | Landline | Bandwidth.Com Clec |
| (779)221- | Landline | Onvoy |
| (779)222- | Landline | Telnyx |
| (779)223- | Landline | Onvoy |
| (779)225- | Wireless | Verizon Wireless |
| (779)226- | Landline | Comcast Ip Phone |
| (779)227- | Landline | Metropcs |
| (779)228- | Landline | Peerless Network Of Illinois |
| (779)229- | Landline | Comcast Ip Phone |
| (779)230- | Wireless | New Cingular Wireless Pcs |
| (779)231- | Landline | Mcimetro Access Transmission Services |
| (779)232- | Landline | Teleport Communications America |
| (779)233- | Wireless | Sprint Spectrum |
| (779)234- | Landline | Bandwidth.Com Clec |
| (779)235- | Landline | At&T |
| (779)236- | Wireless | Sprint Spectrum |
| (779)237- | Wireless | Verizon Wireless |
| (779)238- | Wireless | T-Mobile Usa |
| (779)239- | Wireless | New Cingular Wireless Pcs |
| (779)240- | Wireless | T-Mobile Usa |
| (779)241- | Wireless | T-Mobile Usa |
| (779)242- | Wireless | New Cingular Wireless Pcs |
| (779)243- | Wireless | New Cingular Wireless Pcs |
| (779)244- | Wireless | New Cingular Wireless Pcs |
| (779)245- | Wireless | T-Mobile Usa |
| (779)246- | Landline | Teleport Communications America |
| (779)247- | Wireless | Verizon Wireless |
| (779)248- | Landline | Centurylink Communications |
| (779)249- | Wireless | Verizon Wireless |
| (779)250- | Wireless | T-Mobile Usa |
| (779)251- | Landline | Centurylink Communications |
| (779)252- | Landline | Onvoy |
| (779)253- | Landline | Telnyx |
| (779)254- | Landline | Comcast Ip Phone |
| (779)255- | Landline | Onvoy |
| (779)256- | Landline | Vonage America |
| (779)257- | Landline | Bandwidth.Com Clec |
| (779)258- | Landline | Onvoy |
| (779)259- | Landline | Onvoy |
| (779)260- | Wireless | New Cingular Wireless Pcs |
| (779)261- | Landline | Onvoy Spectrum |
| (779)262- | Landline | Onvoy |
| (779)263- | Landline | Teleport Communications America |
| (779)264- | Wireless | New Cingular Wireless Pcs |
| (779)265- | Landline | Level 3 Communications |
| (779)266- | Landline | Telnyx |
| (779)267- | Wireless | New Cingular Wireless Pcs |
| (779)268- | Landline | Teleport Communications America |
| (779)269- | Landline | Mcimetro Access Transmission Services |
| (779)270- | Landline | Mcimetro Access Transmission Services |
| (779)271- | Wireless | Csc Wireless |
| (779)272- | Landline | Peerless Network Of Illinois |
| (779)273- | Landline | Onvoy |
| (779)274- | Wireless | Csc Wireless |
| (779)275- | Landline | Stratus Networks |
| (779)276- | Landline | Stratus Networks |
| (779)277- | Landline | Telnyx |
| (779)278- | Landline | Stratus Networks |
| (779)279- | Wireless | New Cingular Wireless Pcs |
| (779)280- | Landline | Stratus Networks |
| (779)281- | Landline | Radiantiq |
| (779)282- | Landline | Stratus Networks |
| (779)283- | Landline | Stratus Networks |
| (779)284- | Landline | Stratus Networks |
| (779)285- | Landline | Stratus Networks |
| (779)286- | Landline | Stratus Networks |
| (779)287- | Landline | Onvoy |
| (779)288- | Landline | Onvoy |
| (779)289- | Landline | Nuso |
| (779)290- | Landline | Stratus Networks |
| (779)291- | Landline | Stratus Networks |
| (779)292- | Landline | Stratus Networks |
| (779)293- | Landline | Stratus Networks |
| (779)294- | Landline | Stratus Networks |
| (779)295- | Landline | Stratus Networks |
| (779)296- | Landline | Stratus Networks |
| (779)297- | Landline | Ip Horizon |
| (779)298- | Landline | Ip Horizon |
| (779)299- | Landline | Stratus Networks |
| (779)300- | Wireless | Sprint Spectrum |
| (779)301- | Wireless | T-Mobile Usa |
| (779)302- | Wireless | Verizon Wireless |
| (779)303- | Landline | Telnyx |
| (779)304- | Landline | Stratus Networks |
| (779)305- | Landline | Stratus Networks |
| (779)306- | Landline | Stratus Networks |
| (779)307- | Landline | Stratus Networks |
| (779)308- | Landline | Stratus Networks |
| (779)310- | Landline | Stratus Networks |
| (779)313- | Landline | Stratus Networks |
| (779)314- | Landline | Stratus Networks |
| (779)315- | Landline | Stratus Networks |
| (779)316- | Landline | Stratus Networks |
| (779)317- | Landline | Stratus Networks |
| (779)318- | Landline | Stratus Networks |
| (779)319- | Landline | Stratus Networks |
| (779)320- | Landline | Stratus Networks |
| (779)321- | Landline | Stratus Networks |
| (779)322- | Landline | Stratus Networks |
| (779)323- | Landline | Ip Horizon |
| (779)324- | Landline | Bandwidth.Com Clec |
| (779)325- | Landline | Stratus Networks |
| (779)326- | Landline | Stratus Networks |
| (779)327- | Landline | Onvoy |
| (779)328- | Landline | Onvoy |
| (779)329- | Wireless | T-Mobile Usa |
| (779)330- | Landline | Nuso |
| (779)332- | Landline | Onvoy |
| (779)333- | Landline | Onvoy |
| (779)334- | Landline | Level 3 Communications |
| (779)335- | Landline | Telnyx |
| (779)336- | Landline | Fractel |
| (779)337- | Landline | Onvoy |
| (779)338- | Landline | Onvoy |
| (779)339- | Wireless | New Cingular Wireless Pcs |
| (779)340- | Landline | Bandwidth.Com Clec |
| (779)341- | Wireless | New Cingular Wireless Pcs |
| (779)342- | Landline | Onvoy |
| (779)343- | Landline | Onvoy |
| (779)344- | Landline | Onvoy |
| (779)345- | Landline | Fractel |
| (779)346- | Landline | Fractel |
| (779)347- | Landline | Onvoy |
| (779)348- | Landline | Teleport Communications America |
| (779)349- | Wireless | T-Mobile Usa |
| (779)350- | Wireless | New Cingular Wireless Pcs |
| (779)351- | Landline | Mcleodusa Telecommunication Services |
| (779)352- | Landline | Twilio International |
| (779)353- | Landline | Level 3 Communications |
| (779)354- | Landline | Level 3 Communications |
| (779)355- | Landline | Level 3 Communications |
| (779)356- | Landline | Fractel |
| (779)357- | Wireless | New Cingular Wireless Pcs |
| (779)358- | Landline | Bandwidth.Com Clec |
| (779)359- | Landline | Nuso |
| (779)360- | Wireless | New Cingular Wireless Pcs |
| (779)361- | Wireless | Verizon Wireless |
| (779)362- | Landline | Onvoy |
| (779)363- | Landline | Nuso |
| (779)364- | Landline | Nuso |
| (779)365- | Landline | Nuso |
| (779)366- | Landline | Hd Carrier |
| (779)367- | Landline | Nuso |
| (779)368- | Landline | Comcast Ip Phone |
| (779)369- | Wireless | New Cingular Wireless Pcs |
| (779)377- | Landline | Skyetel |
| (779)379- | Wireless | New Cingular Wireless Pcs |
| (779)382- | Landline | Charter Fiberlink - Illinois |
| (779)389- | Landline | Radiantiq |
| (779)399- | Landline | Fractel |
| (779)400- | Landline | Ymax Communications |
| (779)410- | Landline | Radiantiq |
| (779)423- | Landline | Comcast Ip Phone |
| (779)426- | Landline | Ton80 Communications |
| (779)429- | Landline | At&T |
| (779)432- | Landline | Mtco Communications |
| (779)435- | Landline | Illinois Bell Tel Co |
| (779)444- | Landline | Bandwidth.Com Clec |
| (779)445- | Landline | Metropcs |
| (779)456- | Wireless | T-Mobile Usa |
| (779)463- | Landline | Ton80 Communications |
| (779)465- | Landline | Fractel |
| (779)466- | Landline | Ton80 Communications |
| (779)475- | Landline | Charter Fiberlink - Illinois |
| (779)479- | Landline | Radiantiq |
| (779)499- | Landline | Skyetel |
| (779)500- | Landline | Teleport Communications America |
| (779)513- | Landline | Centurylink Communications |
| (779)529- | Landline | Bandwidth.Com Clec |
| (779)537- | Wireless | Verizon Wireless |
| (779)545- | Landline | Comcast Ip Phone |
| (779)548- | Landline | Bandwidth.Com Clec |
| (779)552- | Landline | Digital Network Access Communications |
| (779)577- | Landline | Skyetel |
| (779)579- | Landline | Radiantiq |
| (779)599- | Landline | Fractel |
| (779)600- | Landline | Fractel |
| (779)601- | Landline | Bandwidth.Com Clec |
| (779)624- | Landline | Ton80 Communications |
| (779)625- | Landline | Ton80 Communications |
| (779)639- | Landline | Ton80 Communications |
| (779)666- | Landline | Onvoy |
| (779)675- | Landline | Ton80 Communications |
| (779)677- | Landline | Fractel |
| (779)678- | Landline | Fractel |
| (779)679- | Landline | Radiantiq |
| (779)696- | Landline | Mcleodusa Telecommunication Services |
| (779)699- | Landline | Fractel |
| (779)701- | Landline | Bandwidth.Com Clec |
| (779)702- | Wireless | T-Mobile Usa |
| (779)703- | Wireless | T-Mobile Usa |
| (779)704- | Landline | Mcimetro Access Transmission Services |
| (779)706- | Wireless | Verizon Wireless |
| (779)707- | Landline | Bandwidth.Com Clec |
| (779)710- | Landline | Radiantiq |
| (779)713- | Wireless | T-Mobile Usa |
| (779)717- | Landline | Peerless Network Of Illinois |
| (779)722- | Landline | Fractel |
| (779)729- | Landline | Radiantiq |
| (779)732- | Landline | Fractel |
| (779)739- | Landline | Twilio International |
| (779)746- | Landline | Ton80 Communications |
| (779)749- | Landline | Radiantiq |
| (779)758- | Landline | Fractel |
| (779)759- | Landline | Radiantiq |
| (779)766- | Landline | Fractel |
| (779)770- | Wireless | New Cingular Wireless Pcs |
| (779)771- | Wireless | New Cingular Wireless Pcs |
| (779)772- | Wireless | New Cingular Wireless Pcs |
| (779)774- | Landline | Onvoy |
| (779)775- | Landline | Skyetel |
| (779)777- | Wireless | New Cingular Wireless Pcs |
| (779)778- | Landline | Onvoy |
| (779)783- | Landline | Ton80 Communications |
| (779)788- | Landline | Fractel |
| (779)789- | Landline | Radiantiq |
| (779)797- | Landline | Terra Nova Telecom |
| (779)799- | Landline | Fractel |
| (779)800- | Landline | Onvoy |
| (779)801- | Landline | Teleport Communications America |
| (779)803- | Landline | Bandwidth.Com Clec |
| (779)804- | Landline | Mcimetro Access Transmission Services |
| (779)809- | Landline | Metropcs |
| (779)832- | Landline | Ton80 Communications |
| (779)837- | Landline | Ton80 Communications |
| (779)855- | Landline | Terra Nova Telecom |
| (779)861- | Wireless | Verizon Wireless |
| (779)867- | Landline | Commio |
| (779)875- | Wireless | Sprint Spectrum |
| (779)877- | Landline | Fractel |
| (779)879- | Landline | Radiantiq |
| (779)888- | Landline | Onvoy |
| (779)895- | Landline | Twilio International |
| (779)899- | Landline | Fractel |
| (779)900- | Landline | Fractel |
| (779)901- | Landline | Bandwidth.Com Clec |
| (779)902- | Landline | Onvoy Spectrum |
| (779)903- | Landline | Onvoy |
| (779)904- | Landline | Onvoy Spectrum |
| (779)910- | Landline | Radiantiq |
| (779)915- | Wireless | T-Mobile Usa |
| (779)922- | Landline | Fractel |
| (779)927- | Landline | Ton80 Communications |
| (779)931- | Landline | Frontier North |
| (779)933- | Landline | Fractel |
| (779)939- | Wireless | New Cingular Wireless Pcs |
| (779)946- | Landline | Fractel |
| (779)970- | Landline | Wavenation |
| (779)977- | Landline | Fractel |
| (779)978- | Wireless | United States Cellular |
| (779)979- | Landline | Radiantiq |
| (779)990- | Landline | Commio |
| (779)991- | Landline | Onvoy |
| (779)994- | Landline | Peerless Network Of Illinois |
| (779)997- | Landline | Ton80 Communications |
| (779)999- | Landline | Peerless Network Of Illinois |
| No prefixes match “”. | ||
Frequently Asked Questions about the 779 Area Code
Who called me from a 779 number?
A 779 number is assigned to Rockford, Illinois, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 779 code to look nearby, so a 779 number doesn't prove the caller is local. Recently, 287 unwanted-call complaints were reported to the FTC for numbers showing the 779 code (67% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 779 a scam area code?
No area code is a scam on its own. 779 is a normal, officially assigned code for Rockford, Illinois. Spam callers spoof local codes to raise the odds you answer, so 779 on your caller ID says nothing about who is really calling. Recently, 287 unwanted-call complaints were reported to the FTC for numbers showing the 779 code (67% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 779 area code?
Repeated calls from different 779 numbers are usually spoofing: a robocaller rotates through 779 numbers so each call looks local and slips past simple blocks. Recently, 287 unwanted-call complaints were reported to the FTC for numbers showing the 779 code (67% 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 779 number?
If you aren't expecting a 779 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 779 area code?
Block a single 779 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 779 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 779?
Area code 779 covers Rockford and the surrounding area in Illinois, spanning 275 cities with about 1,697,555 residents. It shares its area with overlay code 815.
When did area code 779 go into service?
Area code 779 went into service on March 17, 2007. It was added as an overlay of 815, so 779 numbers serve the same area that 815 already covered.
Is 779 a real area code?
Yes. 779 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Rockford, Illinois. A real code can still show up on spoofed spam calls, so treat unknown 779 calls with normal caution.
What timezone is the 779 area code in?
The 779 area code is in the Central Time (CT). Because a number can be kept when someone moves or switches to VoIP, a specific 779 caller may not be in that zone.
How do I call a 779 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 779 and the seven-digit number. From a mobile phone you can usually just enter +1 779 followed by the number and let the phone add the exit code for you.