Illinois 지역 코드: 779
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Note：779 지역 번호는 다음과 같습니다 Illinois, 미국. 국제 전화 번호는 001779 or 001-779、0010779、+1-779、+1+779、+1779、00-1-779、00 1 779.
More About Area Code 779
Area Code 779 was first put in service March 17, 2007. Currently, the largest city it serves is Rockford, IL, and it overlaps coverage areas with area code 815.
Active Phone Number Prefixes
| Prefix | Usage | Primary City | Carrier |
| (779) 200- | Wireless | Rockford | Cellco Partnership DBA Verizon Wireless |
| (779) 201- | Wireless | La Salle | Cellco Partnership DBA Verizon Wireless |
| (779) 202- | Landline | Galena | Teleport Communications America |
| (779) 203- | Wireless | Rockford | Sprint Spectrum L.p. |
| (779) 204- | Landline | Verona | Broadvox-clec |
| (779) 205- | Wireless | Joliet | New Cingular Wireless PCS |
| (779) 206- | Wireless | Joliet | Cellco Partnership DBA Verizon Wireless |
| (779) 207- | Wireless | Rockford | Cellco Partnership DBA Verizon Wireless |
| (779) 208- | Wireless | Rockford | Cellco Partnership DBA Verizon Wireless |
| (779) 209- | Landline | Sandwich | Peerless Network Of Illinois |
| (779) 210- | Landline | Rockford | Sbc Internet Services |
| (779) 212- | Wireless | Dekalb | 365 Wireless |
| (779) 213- | Landline | Oglesby | Peerless Network Of Illinois |
| (779) 214- | Landline | Galena | Mediacom Telephony Of Illinois |
| (779) 215- | Landline | Tonica | Local Access LLC |
| (779) 216- | Landline | Frankfort | Peerless Network Of Illinois |
| (779) 218- | Landline | Watseka | Peerless Network Of Illinois |
| (779) 220- | Landline | Crystal Lake | Bandwidth.com Clec |
| (779) 221- | Landline | Rockford | Broadvox-clec |
| (779) 222- | Landline | Dekalb | Level 3 Communications |
| (779) 225- | Wireless | Joliet | Cellco Partnership DBA Verizon Wireless |
| (779) 226- | Landline | Polo | Comcast Phone Of Illinois DBA Comco |
| (779) 227- | Unknown | Metro PCS | |
| (779) 228- | Landline | Mazon | Peerless Network Of Illinois |
| (779) 229- | Landline | Spring Valley | Comcast Phone Of Illinois DBA Comco |
| (779) 232- | Landline | Wilmington | Teleport Communications America |
| (779) 233- | Wireless | Joliet | Sprint Spectrum L.p. |
| (779) 234- | Landline | Plainfield | Local Access LLC |
| (779) 235- | Wireless | Crescent City | Sbc Internet Services |
| (779) 236- | Wireless | Kankakee | Sprint Spectrum L.p. |
| (779) 240- | Unknown | T-mobile Usa | |
| (779) 245- | Wireless | Sterling | Iowa Wireless Services, Lp |
| (779) 251- | Landline | Dixon | Centurylink Communications LLC |
| (779) 279- | Wireless | Joliet | Cricket Communications |
| (779) 300- | Wireless | Rockford | Sprint Spectrum L.p. |
| (779) 301- | Unknown | T-mobile Usa | |
| (779) 324- | Landline | Frankfort | Bandwidth.com Clec |
| (779) 333- | Landline | Frankfort | Neutral Tandem-illinois |
| (779) 348- | Landline | Rockford | Teleport Communications America |
| (779) 368- | Landline | New Milford | Comcast Phone Of Illinois DBA Comco |
| (779) 379- | Wireless | Joliet | Cricket Communications |
| (779) 382- | Landline | Genoa | Charter Fiberlink - Illinois |
| (779) 400- | Landline | Dekalb | Ymax Communications Corp. |
| (779) 423- | Landline | Rockford | Comcast Phone Of Illinois DBA Comco |
| (779) 429- | Landline | Wilmington | Sbc Internet Services |
| (779) 432- | Landline | Sheffield | Mtco Communications |
| (779) 435- | Landline | Joliet | Ameritech Illinois |
| (779) 444- | Landline | Wonder Lake | Bandwidth.com Clec |
| (779) 456- | Wireless | Joliet | T-mobile Usa |
| (779) 475- | Landline | Beloit | Charter Fiberlink - Illinois |
| (779) 500- | Landline | Rockford | Teleport Communications America |
| (779) 529- | Landline | Manteno | Bandwidth.com Clec |
| (779) 537- | Wireless | Rockford | Cellco Partnership DBA Verizon Wireless |
| (779) 545- | Landline | Mt Morris | Comcast Phone Of Illinois DBA Comco |
| (779) 548- | Landline | Marengo | Bandwidth.com Clec |
| (779) 552- | Landline | Belvidere | Digital Network Access Communications |
| (779) 696- | Landline | Rockford | Mcleodusa Telecommunications Services- Il |
| (779) 702- | Unknown | T-mobile Usa | |
| (779) 703- | Wireless | Joliet | T-mobile Usa |
| (779) 704- | Landline | Mchenry | Mci Worldcom Communications |
| (779) 770- | Wireless | Rockford | Cricket Communications |
| (779) 771- | Wireless | Rockford | Cricket Communications |
| (779) 772- | Wireless | Rockford | Cricket Communications |
| (779) 774- | Landline | Rockford | Tds Metrocom Inc.-il |
| (779) 777- | Wireless | Dekalb | Cricket Communications |
| (779) 800- | Landline | Crystal Lake | Neutral Tandem-illinois |
| (779) 803- | Landline | New Lenox | Bandwidth.com Clec |
| (779) 861- | Wireless | Dixon | Cellco Partnership DBA Verizon Wireless |
| (779) 875- | Wireless | Joliet | Sprint Spectrum L.p. |
| (779) 903- | Landline | Braidwood | Broadvox-clec |
| (779) 994- | Landline | Crystal Lake | Peerless Network Of Illinois |
| (779) 999- | Landline | Newark | Peerless Network Of Illinois |