District of Illinois area codes: 815 | |
---|---|
Country | United States |
State/Province | Illinois |
Major City | Chicago |
Time Zone | Central |
Prefix | County | Primary City | Company |
---|---|---|---|
815-362 | Stephenson | German Valley, IL | Frontier North |
815-363 | Mchenry | Mchenry, IL | Ameritech Illinois |
815-364 | Grundy | Morris, IL | Broadwing Communications |
815-365 | Kankakee | Reddick, IL | Frontier North |
815-366 | La Salle | Ottawa, IL | Broadwing Communications |
815-367 | Stephenson | Winslow, IL | Frontier North |
815-368 | La Salle | Lostant, IL | Frontier North |
815-369 | Stephenson | Lena, IL | Frontier North |
815-370 | Kankakee | Kankakee, IL | Cellco Partnership DBA Verizon Wireless |
815-371 | La Salle | Utica, IL | Broadwing Communications |
815-372 | Will | Romeoville, IL | Ameritech Illinois |
815-373 | Will | Elwood, IL | Us Xchange Of Illinois LLC DBA Choice One Comm Il |
815-374 | Livingston | Dwight, IL | Us Xchange Of Illinois LLC DBA Choice One Comm Il |
815-375 | Dekalb | Dekalb, IL | United States Cellular Corp. - Illinois |
815-376 | Bureau | Ohio, IL | Frontier North |
815-377 | Iroquois | Crescent City, IL | Broadwing Communications |
815-378 | Winnebago | Rockford, IL | Sprint Spectrum L.p. |
815-379 | Bureau | Walnut, IL | Frontier North |
815-380 | Whiteside | Sterling, IL | Essex Telcom |
815-381 | Winnebago | Rockford, IL | Ameritech 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.