Telephone Area 815. Page 6.
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 |
|---|---|---|---|
| Frontier North | Ford | Piper City, IL | +1-815686-SSSS |
| Rcn Telecom Services Of Illinois | Mchenry | Woodstock, IL | +1-815687-SSSS |
| Frontier North | Livingston | Strawn, IL | +1-815688-SSSS |
| Frontier Communications Of Illinois | Livingston | Cullom, IL | +1-815689-SSSS |
| United States Cellular Corp. - Illinois | Will | Joliet, IL | +1-815690-SSSS |
| Rcn Telecom Services Of Illinois | La Salle | Utica, IL | +1-815691-SSSS |
| Frontier North | Livingston | Fairbury, IL | +1-815692-SSSS |
| Nextel Communications | Will | Joliet, IL | +1-815693-SSSS |
| Frontier North | Iroquois | Clifton, IL | +1-815694-SSSS |
| Ameritech Illinois | Kendall | Newark, IL | +1-815695-SSSS |
| Aero North Communications | Winnebago | Roscoe, IL | +1-815696-SSSS |
| Frontier North | Iroquois | Chebanse, IL | +1-815697-SSSS |
| Frontier North | Iroquois | Ashkum, IL | +1-815698-SSSS |
| Frontier North | Bureau | Wyanet, IL | +1-815699-SSSS |
| Level 3 Communications | Mchenry | Woodstock, IL | +1-815701-SSSS |
| Sprint Communications Company, L.p. | Livingston | Saunemin, IL | +1-815702-SSSS |
| Nextel Communications | Winnebago | Rockford, IL | +1-815703-SSSS |
| Mcleodusa Telecommunications Services- Il | Winnebago | Beloit, IL | +1-815704-SSSS |
| Teleport Communications Group - Chicago | Grundy | Morris, IL | +1-815705-SSSS |
| Essex Telcom | Whiteside | Lyndon, IL | +1-815706-SSSS |
| Level 3 Communications | Iroquois | Gilman, IL | +1-815707-SSSS |
| Comcast Phone Of Illinois DBA Comco | Rockford, IL | +1-815708-SSSS | |
| Level 3 Communications | Grundy | Coal City, IL | +1-815709-SSSS |
| AT&T Local | Grundy | Morris, IL | +1-815710-SSSS |
| Nextel Communications | Mchenry | Harvard, IL | +1-815712-SSSS |
| New Cingular Wireless PCS | Winnebago | Rockford, IL | +1-815713-SSSS |
| Sprint Communications Company, L.p. | Will | Joliet, IL | +1-815714-SSSS |
| New Cingular Wireless PCS | Will | Joliet, IL | +1-815715-SSSS |
| Nextel Communications | Whiteside | Sterling, IL | +1-815716-SSSS |
| Broadwing Communications | Will | New Lenox, IL | +1-815717-SSSS |
| United States Cellular Corp. - Illinois | Whiteside | Sterling, IL | +1-815718-SSSS |
| Nextel Communications | Bureau | Princeton, IL | +1-815719-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815720-SSSS |
| AT&T Local | Winnebago | Rockford, IL | +1-815721-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815722-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815723-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815724-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815725-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815726-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815727-SSSS |
| Frontier North | Mchenry | Wonder Lake, IL | +1-815728-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815729-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815730-SSSS |
| Ameritech Illinois | Plainfield, IL | +1-815731-SSSS | |
| Frontier North | Ogle | Oregon, IL | +1-815732-SSSS |
| Rcn Telecom Services Of Illinois | Will | Plainfield, IL | +1-815733-SSSS |
| Frontier North | Ogle | Mt Morris, IL | +1-815734-SSSS |
| New Cingular Wireless PCS | Will | Joliet, IL | +1-815735-SSSS |
| Ameritech Illinois | Kendall | Lisbon, IL | +1-815736-SSSS |
| Sharon Telephone Co. - Illinois | Boone | Capron, IL | +1-815737-SSSS |
| Leaf River Telephone Co. | Ogle | Leaf River, IL | +1-815738-SSSS |
| Nextel Communications | Dekalb | Sycamore, IL | +1-815739-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815740-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815741-SSSS |
| United States Cellular Corp. - Illinois | Winnebago | Rockford, IL | +1-815742-SSSS |
| Frontier Communications Of Prairie | Livingston | Graymont, IL | +1-815743-SSSS |
| Ameritech Illinois | Will | Joliet, IL | +1-815744-SSSS |
| Frontier North | Jo Daviess | Warren, IL | +1-815745-SSSS |
| Marseilles Telephone Co. Of Marseilles | Dekalb | Marseilles, IL | +1-815746-SSSS |
| Citizens Telecom Co Illinois-frontier Citizens -il | Jo Daviess | East Dubuque, IL | +1-815747-SSSS |
| Frontier North | Dekalb | Dekalb, IL | +1-815748-SSSS |
| Answer America DBA Answer Usa | Winnebago | Rockford, IL | +1-815749-SSSS |
| Marseilles Telephone Co. Of Marseilles | La Salle | Marseilles, IL | +1-815750-SSSS |
| Cellco Partnership DBA Verizon Wireless | Dekalb | Dekalb, IL | +1-815751-SSSS |
| Frontier North | Dekalb | Dekalb, IL | +1-815752-SSSS |
| Frontier North | Dekalb | Dekalb, IL | +1-815753-SSSS |
| Frontier North | Dekalb | Dekalb, IL | +1-815754-SSSS |
| American Messaging (am) | Dekalb | Dekalb, IL | +1-815755-SSSS |
| Frontier North | Dekalb | Dekalb, IL | +1-815756-SSSS |
| United States Cellular Corp. - Illinois | Dekalb | Dekalb, IL | +1-815757-SSSS |
| Frontier North | Dekalb | Dekalb, IL | +1-815758-SSSS |
| Ameritech Illinois | Mchenry | Mchenry, IL | +1-815759-SSSS |
| Cellco Partnership DBA Verizon Wireless | Putnam | Hennepin, IL | +1-815760-SSSS |
| Cellco Partnership DBA Verizon Wireless | Dekalb | Dekalb, IL | +1-815761-SSSS |
| Cellco Partnership DBA Verizon Wireless | Dekalb | Dekalb, IL | +1-815762-SSSS |
| Answer America DBA Answer Usa | Winnebago | Rockford, IL | +1-815763-SSSS |
| United States Cellular Corp. - Illinois | Dekalb | Dekalb, IL | +1-815764-SSSS |
| Frontier North | Boone | Poplar Grove, IL | +1-815765-SSSS |
| United States Cellular Corp. - Illinois | Dekalb | Dekalb, IL | +1-815766-SSSS |
| American Messaging (am) | Cook | La Grange Park, IL | +1-815767-SSSS |
