Area Code 815

815 is the North American Telephone Area Code For Illinois in United States.
District of Illinois area codes: 815
Country United States
State/Province Illinois
Major City Chicago
Time Zone Central

Phone directory with area code 815

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
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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.

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