Telephone Area 815. Page 7.
Prefix: +1815
This prefix is distributed within the state Illinois
The largest city in the region is Rockford
Time Zone: Central
Winter time: UTC-6
Summer time: UTC-5
Below on the map, there is indicated the largest city in the telephone area +1-815-...-.... Illinois Rockford.
Phone numbers +1-815-YYY-YYYY
| Company | District | Major City | Prefix |
|---|---|---|---|
| Ameritech Illinois | Will | Joliet, IL | +1-815768-SSSS |
| Broadwing Communications | La Salle | Seneca, IL | +1-815769-SSSS |
| Charter Fiberlink - Illinois | Harvard, IL | +1-815770-SSSS | |
| Rcn Telecom Services Of Illinois | Iroquois | Ashkum, IL | +1-815771-SSSS |
| Citizens Telecom Co Illinois-frontier Citizens -il | Whiteside | Morrison, IL | +1-815772-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815773-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815774-SSSS |
| Usa Mobility Wireless | Mchenry | Woodstock, IL | +1-815775-SSSS |
| Ameritech Illinois | Jo Daviess | Galena, IL | +1-815776-SSSS |
| Ameritech Illinois | Jo Daviess | Galena, IL | +1-815777-SSSS |
| Citizens Telecom Co Illinois-frontier Citizens -il | Whiteside | Lyndon, IL | +1-815778-SSSS |
| Broadwing Communications | La Salle | La Salle, IL | +1-815780-SSSS |
| Rcn Telecom Services Of Illinois | Iroquois | Chebanse, IL | +1-815781-SSSS |
| Broadwing Communications | Will | Plainfield, IL | +1-815782-SSSS |
| Rcn Telecom Services Of Illinois | Iroquois | Gilman, IL | +1-815783-SSSS |
| Frontier North | Dekalb | Genoa, IL | +1-815784-SSSS |
| Rcn Telecom Services Of Illinois | Iroquois | Watseka, IL | +1-815785-SSSS |
| Frontier North | Dekalb | Sandwich, IL | +1-815786-SSSS |
| Frontier North | Dekalb | Dekalb, IL | +1-815787-SSSS |
| Ameritech Illinois | Mchenry | Crystal Lake, IL | +1-815788-SSSS |
| Frontier North | Stephenson | Orangeville, IL | +1-815789-SSSS |
| Nextel Communications | Mchenry | Woodstock, IL | +1-815790-SSSS |
| Nextel Communications | Will | Joliet, IL | +1-815791-SSSS |
| Ameritech Illinois | La Salle | Harding, IL | +1-815792-SSSS |
| T-mobile Usa | Dekalb | Dekalb, IL | +1-815793-SSSS |
| Marseilles Telephone Co. Of Marseilles | La Salle | Marseilles, IL | +1-815794-SSSS |
| Marseilles Telephone Co. Of Marseilles | La Salle | Marseilles, IL | +1-815795-SSSS |
| Frontier Communications Of Prairie | Livingston | Flanagan, IL | +1-815796-SSSS |
| Level 3 Communications | Dekalb | Somonauk, IL | +1-815797-SSSS |
| Essex Telcom | Carroll | Milledgeville, IL | +1-815798-SSSS |
| Sprint Communications Company, L.p. | Whiteside | Sterling, IL | +1-815799-SSSS |
| Mediacom Telephony Of Illinois | Poplar Grove, IL | +1-815800-SSSS | |
| Aero North Communications | Stephenson | Freeport, IL | +1-815801-SSSS |
| Ameritech Illinois | Kankakee | Kankakee, IL | +1-815802-SSSS |
| Aero North Communications | Ogle | Byron, IL | +1-815803-SSSS |
| Aero North Communications | Winnebago | Pecatonica, IL | +1-815804-SSSS |
| Aero North Communications | Winnebago | Durand, IL | +1-815805-SSSS |
| Ameritech Illinois | Will | Frankfort, IL | +1-815806-SSSS |
| Aero North Communications | Stephenson | German Valley, IL | +1-815807-SSSS |
| Aero North Communications | Stephenson | Winslow, IL | +1-815808-SSSS |
| Aero North Communications | Stephenson | Lena, IL | +1-815809-SSSS |
| Aero North Communications | Stephenson | Pearl City, IL | +1-815810-SSSS |
| Aero North Communications | Stephenson | Dakota, IL | +1-815812-SSSS |
| Aero North Communications | Jo Daviess | Apple River, IL | +1-815813-SSSS |
| T-mobile Usa | Mchenry | Woodstock, IL | +1-815814-SSSS |
| Aero North Communications | Stephenson | Dakota, IL | +1-815816-SSSS |
| Aero North Communications | Jo Daviess | Hanover, IL | +1-815817-SSSS |
| Aero North Communications | Jo Daviess | Warren, IL | +1-815818-SSSS |
| Aero North Communications | Stephenson | Orangeville, IL | +1-815819-SSSS |
| Aero North Communications | Jo Daviess | Elizabeth, IL | +1-815820-SSSS |
| United States Cellular Corp. - Illinois | Stephenson | Freeport, IL | +1-815821-SSSS |
| New Cingular Wireless PCS | La Salle | Streator, IL | +1-815822-SSSS |
| Xo Illinois | Will | Joliet, IL | +1-815823-SSSS |
| Frontier North | Dekalb | Shabbona, IL | +1-815824-SSSS |
| Frontier North | Dekalb | Malta, IL | +1-815825-SSSS |
| Cellco Partnership DBA Verizon Wireless | Dekalb | Somonauk, IL | +1-815826-SSSS |
| Frontier North | Kane | Maple Park, IL | +1-815827-SSSS |
| Xo Illinois | Grundy | Minooka, IL | +1-815828-SSSS |
| Essex Telcom | Carroll | Chadwick, IL | +1-815829-SSSS |
| New Cingular Wireless PCS | La Salle | Oglesby, IL | +1-815830-SSSS |
| Aero North Communications | Stephenson | Davis, IL | +1-815831-SSSS |
| Frontier Communications Of Illinois | Livingston | Saunemin, IL | +1-815832-SSSS |
| Aero North Communications | Stephenson | Mc Connell, IL | +1-815833-SSSS |
| Ameritech Illinois | Will | Lockport, IL | +1-815834-SSSS |
| Essex Telcom | Lee | Dixon, IL | +1-815835-SSSS |
| Ameritech Illinois | Will | Lockport, IL | +1-815836-SSSS |
| Aero North Communications | Ogle | Forreston, IL | +1-815837-SSSS |
| Ameritech Illinois | Will | Lockport, IL | +1-815838-SSSS |
| Xo Illinois | Kankakee | Kankakee, IL | +1-815839-SSSS |
| Aero North Communications | Jo Daviess | Stockton, IL | +1-815840-SSSS |
| Essex Telcom | Ogle | Mt Morris, IL | +1-815841-SSSS |
| Frontier North | Livingston | Pontiac, IL | +1-815842-SSSS |
| Essex Telcom | Lee | Ashton, IL | +1-815843-SSSS |
| Frontier North | Livingston | Pontiac, IL | +1-815844-SSSS |
| Frontier North | Jo Daviess | Scales Mound, IL | +1-815845-SSSS |
| Broadwing Communications | Will | Joliet, IL | +1-815846-SSSS |
| Sbc Internet Services | Winnebago | Rockford, IL | +1-815847-SSSS |
| Illinois Valley Cellular Rsa 2-i Partnership | Livingston | Pontiac, IL | +1-815848-SSSS |
| Frontier North | Lee | Sublette, IL | +1-815849-SSSS |
| Aero North Communications | Winnebago | Pecatonica, IL | +1-815850-SSSS |
