District of Illinois area codes: 815 | |
---|---|
Country | United States |
State/Province | Illinois |
Major City | Chicago |
Time Zone | Central |
Prefix | County | Primary City | Company |
---|---|---|---|
815-382 | Mchenry | Woodstock, IL | New Cingular Wireless PCS |
815-383 | Iroquois | Crescent City, IL | New Cingular Wireless PCS |
815-384 | Dekalb | Malta, IL | Frontier North |
815-385 | Mchenry | Mchenry, IL | Ameritech Illinois |
815-386 | Kankakee | Kankakee, IL | Cellco Partnership DBA Verizon Wireless |
815-387 | Winnebago | Rockford, IL | Ameritech Illinois |
815-388 | Mchenry | Mchenry, IL | Sprint Spectrum L.p. |
815-389 | Winnebago | Beloit, IL | Ameritech Illinois |
815-390 | Will | Braidwood, IL | Comcast Phone Of Illinois DBA Comco |
815-391 | Winnebago | Rockford, IL | Ameritech Illinois |
815-392 | Grundy | Kinsman, IL | Kinsman Mutual Telephone Company |
815-393 | Ogle | Monroe Center, IL | Frontier North |
815-394 | Winnebago | Rockford, IL | Ameritech Illinois |
815-395 | Winnebago | Rockford, IL | Ameritech Illinois |
815-396 | Lee | Steward, IL | Frontier North |
815-397 | Winnebago | Rockford, IL | Ameritech Illinois |
815-398 | Winnebago | Rockford, IL | Ameritech Illinois |
815-399 | Winnebago | Rockford, IL | Ameritech Illinois |
815-400 | Whiteside | Morrison, IL | Mediacom Telephony Of Illinois |
815-401 | Kankakee | Kankakee, IL | Level 3 Communications |
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.