District of Illinois area codes: 815 | |
---|---|
Country | United States |
State/Province | Illinois |
Major City | Chicago |
Time Zone | Central |
Prefix | County | Primary City | Company |
---|---|---|---|
815-221 | Will | Lockport, IL | Teleport Communications America |
815-222 | Winnebago | Rockford, IL | Cellco Partnership DBA Verizon Wireless |
815-223 | La Salle | La Salle, IL | Ameritech Illinois |
815-224 | La Salle | La Salle, IL | Ameritech Illinois |
815-225 | Carroll | Milledgeville, IL | Citizens Telecom Co Illinois-frontier Citizens -il |
815-226 | Winnebago | Rockford, IL | Ameritech Illinois |
815-227 | Winnebago | Rockford, IL | Ameritech Illinois |
815-228 | La Salle | Oglesby, IL | New Cingular Wireless PCS |
815-229 | Winnebago | Rockford, IL | Ameritech Illinois |
815-230 | Will | Plainfield, IL | Broadwing Communications |
815-231 | Winnebago | Rockford, IL | Ameritech Illinois |
815-232 | Stephenson | Freeport, IL | Frontier North |
815-233 | Stephenson | Freeport, IL | Frontier North |
815-234 | Ogle | Byron, IL | Frontier North |
815-235 | Stephenson | Freeport, IL | Frontier North |
815-236 | Mchenry | Woodstock, IL | New Cingular Wireless PCS |
815-237 | Grundy | Gardner, IL | Ameritech Illinois |
815-238 | Stephenson | Freeport, IL | Cellco Partnership DBA Verizon Wireless |
815-239 | Winnebago | Pecatonica, IL | Frontier North |
815-240 | Winnebago | Rockford, IL | Charter Fiberlink - Illinois |
There are 785 prefixes, In the code area, the major cities are Belvidere, IL;Crystal Lake, IL;De Kalb, IL;Freepor. The major city is Chicago.