District of Illinois area codes: 815 | |
---|---|
Country | United States |
State/Province | Illinois |
Major City | Chicago |
Time Zone | Central |
Prefix | County | Primary City | Company |
---|---|---|---|
815-301 | Mchenry | Crystal Lake, IL | Broadwing Communications |
815-302 | Will | Joliet, IL | Sprint Spectrum L.p. |
815-303 | Bureau | Princeton, IL | Illinois Valley Cellular Rsa 2-i Partnership |
815-304 | Kankakee | Kankakee, IL | Broadwing Communications |
815-305 | Grundy | Gardner, IL | Broadwing Communications |
815-306 | Will | Lockport, IL | Broadwing Communications |
815-307 | Mchenry | Mchenry, IL | Broadwing Communications |
815-308 | Mchenry | Woodstock, IL | Broadwing Communications |
815-309 | Carroll | Shannon, IL | Aero North Communications |
815-310 | La Salle | Utica, IL | Broadwing Communications |
815-312 | Winnebago | Rockford, IL | Ymax Communications Corp. |
815-313 | La Salle | Ottawa, IL | Broadwing Communications |
815-314 | Will | Manhattan, IL | Broadwing Communications |
815-315 | Winnebago | Rockford, IL | Level 3 Communications |
815-316 | Winnebago | Rockford, IL | Tds Metrocom Inc.-il |
815-317 | Iroquois | Crescent City, IL | Broadwing Communications |
815-318 | Grundy | Morris, IL | Broadwing Communications |
815-319 | Winnebago | Rockford, IL | United States Cellular Corp. - Illinois |
815-320 | Kankakee | Kankakee, IL | Peerless Network Of Illinois |
815-321 | Mchenry | Woodstock, IL | Xo 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.