Telephone Area 815. Page 9.
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 | Kankakee | Kankakee, IL | +1-815932-SSSS |
| Ameritech Illinois | Kankakee | Kankakee, IL | +1-815933-SSSS |
| Frontier North | Livingston | Emington, IL | +1-815934-SSSS |
| Ameritech Illinois | Kankakee | Kankakee, IL | +1-815935-SSSS |
| Ameritech Illinois | Kankakee | Kankakee, IL | +1-815936-SSSS |
| Ameritech Illinois | Kankakee | Kankakee, IL | +1-815937-SSSS |
| Frontier North | Ogle | Forreston, IL | +1-815938-SSSS |
| Ameritech Illinois | Kankakee | Kankakee, IL | +1-815939-SSSS |
| Level 3 Communications | Grundy | Gardner, IL | +1-815940-SSSS |
| Ameritech Illinois | Grundy | Morris, IL | +1-815941-SSSS |
| Ameritech Illinois | Grundy | Morris, IL | +1-815942-SSSS |
| Ameritech Illinois | Mchenry | Harvard, IL | +1-815943-SSSS |
| Ameritech Illinois | Kankakee | Saint Anne, IL | +1-815944-SSSS |
| Frontier North | Mclean | Chenoa, IL | +1-815945-SSSS |
| Citizens Telecom Co Illinois-frontier Citizens -il | Ogle | Polo, IL | +1-815946-SSSS |
| Frontier North | Jo Daviess | Stockton, IL | +1-815947-SSSS |
| Citizens Telecom Co Illinois-frontier Citizens -il | Whiteside | Prophetstown, IL | +1-815948-SSSS |
| Frontier North | Ford | Cabery, IL | +1-815949-SSSS |
| Essex Telcom | Lee | Amboy, IL | +1-815951-SSSS |
| Aero North Communications | Lanark, IL | +1-815952-SSSS | |
| Cellco Partnership DBA Verizon Wireless | Kankakee | Kankakee, IL | +1-815953-SSSS |
| Cellco Partnership DBA Verizon Wireless | Kankakee | Kankakee, IL | +1-815954-SSSS |
| Nextel Communications | Will | Joliet, IL | +1-815955-SSSS |
| Sprint Communications Company, L.p. | Whiteside | Morrison, IL | +1-815956-SSSS |
| Level 3 Communications | Winnebago | Rockton, IL | +1-815957-SSSS |
| North County Communications Corp. - CA | Ogle | Leaf River, IL | +1-815960-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815961-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815962-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815963-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815964-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815965-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815966-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815967-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815968-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815969-SSSS |
| Nextel Communications | Dekalb | Sycamore, IL | +1-815970-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815971-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815972-SSSS |
| United States Cellular Corp. - Illinois | Lee | Dixon, IL | +1-815973-SSSS |
| Essex Telcom | Whiteside | Tampico, IL | +1-815974-SSSS |
| New Cingular Wireless PCS | Boone | Belvidere, IL | +1-815975-SSSS |
| Mci Worldcom Communications | Winnebago | Rockford, IL | +1-815977-SSSS |
| Cellco Partnership DBA Verizon Wireless | Winnebago | Rockford, IL | +1-815978-SSSS |
| Cellco Partnership DBA Verizon Wireless | Winnebago | Rockford, IL | +1-815979-SSSS |
| Cellco Partnership DBA Verizon Wireless | Rockford, IL | +1-815980-SSSS | |
| Level 3 Communications | La Salle | Ottawa, IL | +1-815981-SSSS |
| Essex Telcom | Whiteside | Tampico, IL | +1-815982-SSSS |
| American Messaging (am) | Winnebago | Rockford, IL | +1-815983-SSSS |
| Frontier Communications Of The Carolinas, Inc | Iroquois | Wellington, IL | +1-815984-SSSS |
| Cellco Partnership DBA Verizon Wireless | Winnebago | Rockford, IL | +1-815985-SSSS |
| Us Xchange Of Illinois LLC DBA Choice One Comm Il | Winnebago | Rockford, IL | +1-815986-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815987-SSSS |
| United States Cellular Corp. - Illinois | Winnebago | Rockford, IL | +1-815988-SSSS |
| Sprint Communications Company, L.p. | Whiteside | Prophetstown, IL | +1-815989-SSSS |
| Cellco Partnership DBA Verizon Wireless | Stephenson | Freeport, IL | +1-815990-SSSS |
| Essex Telcom | Dekalb | Sycamore, IL | +1-815991-SSSS |
| Nextel Communications | La Salle | Streator, IL | +1-815992-SSSS |
| New Cingular Wireless PCS | Oglesby, IL | +1-815993-SSSS | |
| Nextel Communications | Lee | Dixon, IL | +1-815994-SSSS |
| Teleport Communications Group - Chicago | Dekalb, IL | +1-815995-SSSS | |
| Nextel Communications | Savanna, IL | +1-815996-SSSS | |
| Mcleodusa Telecommunications Services- Il | Winnebago | Rockford, IL | +1-815997-SSSS |
| Frontier North | Livingston | Odell, IL | +1-815998-SSSS |
| United States Cellular Corp. - Illinois | Will | Joliet, IL | +1-815999-SSSS |
