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Area Code 815 - Chicago, IL

Below is the information for Area Code 815
General Information for Area Code 815
Country United States
State/Province Illinois
Major City Chicago
Time Zone Central

Phone directory of numbers beginning with Area Code 815 Prefixes

Prefix Primary City County Phone Type
815-221 Lockport, IL Will Landline
815-222 Rockford, IL Winnebago Cell Number
815-223 La Salle, IL La Salle Landline
815-224 La Salle, IL La Salle Landline
815-225 Milledgeville, IL Carroll Landline
815-226 Rockford, IL Winnebago Landline
815-227 Rockford, IL Winnebago Landline
815-228 Oglesby, IL La Salle Cell Number
815-229 Rockford, IL Winnebago Landline
815-230 Plainfield, IL Will Landline
815-231 Rockford, IL Winnebago Landline
815-232 Freeport, IL Stephenson Landline
815-233 Freeport, IL Stephenson Landline
815-234 Byron, IL Ogle Landline
815-235 Freeport, IL Stephenson Landline
815-236 Woodstock, IL Mchenry Cell Number
815-237 Gardner, IL Grundy Landline
815-238 Freeport, IL Stephenson Cell Number
815-239 Pecatonica, IL Winnebago Landline
815-240 Rockford, IL Winnebago Landline
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Location Details

Area code is a type of numbering scheme used in telecommunication. It divides the territories of its member countries, the code is a three-digit code. The digits 0 and 1 applied for central office codes. Other digits were applied into geographic areas of the service territory.

  • 200: easily recognizable code (ERC)
  • 201: New Jersey
  • 202: Washington, D.C.
  • 203: Connecticut
    • and so on.

If you want to get more informatons of the areacode, Input an areacode into the above search area, get what you want.