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
815-301 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
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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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