Telephone Area 815. Page 5.
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 |
|---|---|---|---|
| Level 3 Communications | Kankakee | Grant Park, IL | +1-815605-SSSS |
| Globalcom-il | La Salle | Ottawa, IL | +1-815606-SSSS |
| Bitwise Communications | Livingston | Flanagan, IL | +1-815607-SSSS |
| T-mobile Usa | Winnebago | Rockford, IL | +1-815608-SSSS |
| Ameritech Illinois | Will | Plainfield, IL | +1-815609-SSSS |
| Bitwise Communications | Livingston | Cornell, IL | +1-815610-SSSS |
| Bitwise Communications | Livingston | Graymont, IL | +1-815612-SSSS |
| Essex Telcom | Carroll | Mt Carroll, IL | +1-815613-SSSS |
| Broadwing Communications | Kankakee | Kankakee, IL | +1-815614-SSSS |
| Level 3 Communications | La Salle | Mendota, IL | +1-815615-SSSS |
| T-mobile Usa | Stephenson | Freeport, IL | +1-815616-SSSS |
| AT&T Local | La Salle | Ottawa, IL | +1-815617-SSSS |
| New Cingular Wireless PCS | Freeport, IL | +1-815618-SSSS | |
| Aero North Communications | Winnebago | Rockton, IL | +1-815619-SSSS |
| Essex Telcom | Whiteside | Prophetstown, IL | +1-815620-SSSS |
| Sprint Spectrum L.p. | Winnebago | Rockford, IL | +1-815621-SSSS |
| Ameritech Illinois | Whiteside | Sterling, IL | +1-815622-SSSS |
| Frontier North | Winnebago | Roscoe, IL | +1-815623-SSSS |
| Frontier North | Winnebago | Rockton, IL | +1-815624-SSSS |
| Ameritech Illinois | Whiteside | Sterling, IL | +1-815625-SSSS |
| Ameritech Illinois | Whiteside | Sterling, IL | +1-815626-SSSS |
| Frontier North | Lee | Paw Paw, IL | +1-815627-SSSS |
| Frontier North | Lee | West Brooklyn, IL | +1-815628-SSSS |
| Frontier North | Winnebago | Durand, IL | +1-815629-SSSS |
| T-mobile Usa | Joliet, IL | +1-815630-SSSS | |
| Ameritech Illinois | Whiteside | Sterling, IL | +1-815631-SSSS |
| Ameritech Illinois | Whiteside | Sterling, IL | +1-815632-SSSS |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1-815633-SSSS |
| Ameritech Illinois | Grundy | Coal City, IL | +1-815634-SSSS |
| Frontier North | Livingston | Chatsworth, IL | +1-815635-SSSS |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1-815636-SSSS |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1-815637-SSSS |
| Frontier North | Bureau | La Moille, IL | +1-815638-SSSS |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1-815639-SSSS |
| Teleport Communications Group - Chicago | La Salle | Ottawa, IL | +1-815640-SSSS |
| Cellco Partnership DBA Verizon Wireless | Rockford, IL | +1-815641-SSSS | |
| Broadwing Communications | Grundy | Minooka, IL | +1-815642-SSSS |
| Frontier North | Bureau | Malden, IL | +1-815643-SSSS |
| Rcn Telecom Services Of Illinois | Iroquois | Crescent City, IL | +1-815644-SSSS |
| Frontier North | Ogle | Stillman Valley, IL | +1-815645-SSSS |
| Frontier North | Bureau | Tiskilwa, IL | +1-815646-SSSS |
| Sprint Communications Company, L.p. | Livingston | Cullom, IL | +1-815647-SSSS |
| Frontier North | Mchenry | Hebron, IL | +1-815648-SSSS |
| Rcn Telecom Services Of Illinois | Grundy | Gardner, IL | +1-815649-SSSS |
| AT&T Local | Stephenson | Freeport, IL | +1-815650-SSSS |
| Rcn Telecom Services Of Illinois | Will | Joliet, IL | +1-815651-SSSS |
| Gallatin River Communications DBA Centurylink | Lee | Dixon, IL | +1-815652-SSSS |
| Frontier North | Mchenry | Wonder Lake, IL | +1-815653-SSSS |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1-815654-SSSS |
| Essex Telcom | Carroll | Milledgeville, IL | +1-815655-SSSS |
| Level 3 Communications | Stephenson | Freeport, IL | +1-815656-SSSS |
| Ameritech Illinois | Livingston | Forrest, IL | +1-815657-SSSS |
| Essex Telcom | Carroll | Lanark, IL | +1-815658-SSSS |
| Frontier North | Putnam | Hennepin, IL | +1-815659-SSSS |
| Rcn Telecom Services Of Illinois | Will | Lockport, IL | +1-815660-SSSS |
| Rcn Telecom Services Of Illinois | Grundy | Morris, IL | +1-815661-SSSS |
| Level 3 Communications | Kankakee | Momence, IL | +1-815662-SSSS |
| Frontier North | Bureau | Spring Valley, IL | +1-815663-SSSS |
| Frontier North | Bureau | Spring Valley, IL | +1-815664-SSSS |
| Rcn Telecom Services Of Illinois | La Salle | Ottawa, IL | +1-815665-SSSS |
| Cellco Partnership DBA Verizon Wireless | Joliet, IL | +1-815666-SSSS | |
| Ameritech Illinois | La Salle | Utica, IL | +1-815667-SSSS |
| Neutral Tandem-illinois | Will | Rockford, IL | +1-815668-SSSS |
| Level 3 Communications | Mchenry | Mchenry, IL | +1-815669-SSSS |
| Sprint Spectrum L.p. | Winnebago | Rockford, IL | +1-815670-SSSS |
| Level 3 Communications | Will | Joliet, IL | +1-815671-SSSS |
| Frontier North | La Salle | Streator, IL | +1-815672-SSSS |
| Frontier North | La Salle | Streator, IL | +1-815673-SSSS |
| New Cingular Wireless PCS | La Salle | Streator, IL | +1-815674-SSSS |
| Frontier North | Mchenry | Spring Grove, IL | +1-815675-SSSS |
| Level 3 Communications | Will | Plainfield, IL | +1-815676-SSSS |
| Cellco Partnership DBA Verizon Wireless | Jo Daviess | Elizabeth, IL | +1-815677-SSSS |
| Frontier North | Mchenry | Richmond, IL | +1-815678-SSSS |
| Rcn Telecom Services Of Illinois | Mchenry | Mchenry, IL | +1-815679-SSSS |
| Rcn Telecom Services Of Illinois | Will | Manhattan, IL | +1-815680-SSSS |
| Cellco Partnership DBA Verizon Wireless | Winnebago | Rockford, IL | +1-815681-SSSS |
| Frontier Communications Of The Carolinas, Inc | Iroquois | Milford, IL | +1-815682-SSSS |
| Ameritech Illinois | Iroquois | Crescent City, IL | +1-815683-SSSS |
| Citizens Telecom Co Illinois-frontier Citizens -il | Carroll | Chadwick, IL | +1-815684-SSSS |
| New Cingular Wireless PCS | Will | Joliet, IL | +1-815685-SSSS |
