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
815-200 La Salle, IL La Salle Landline
815-201 Rockford, IL Winnebago Cell Number
815-202 Oglesby, IL La Salle Cell Number
815-203 Joliet, IL Will Cell Number
815-204 Crystal Lake, IL Mchenry Cell Number
815-205 La Grange Park, IL Cook Cell Number
815-206 Woodstock, IL Mchenry Landline
815-207 Joliet, IL Will Landline
815-208 Fulton, IL Whiteside Landline
815-209 Rockford, IL Winnebago Landline
815-210 Joliet, IL Will Cell Number
815-212 Joliet, IL Will Landline
815-213 Sterling, IL Whiteside Cell Number
815-214 Kankakee, IL Kankakee Landline
815-215 New Lenox, IL Will Landline
815-216 Kankakee, IL Kankakee Cell Number
815-217 Dekalb, IL Dekalb Landline
815-218 Rockford, IL Winnebago Cell Number
815-219 Crystal Lake, IL Mchenry Cell Number
815-220 La Salle, IL La Salle 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.

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