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Area Code 815

Browse available prefixes, locations, carriers, and quick path links into deeper phone number pages for this area code. Area-code research is one of the most important parts of reverse phone lookup because it gives visitors a geographic starting point before they inspect a full number.

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200Prefixes Listed
IllinoisLocation
United StatesCountry
815Area Code
Area Code Overview
Area Code815
Primary LocationIllinois
CountryUnited States
Prefix Coverage200 listed prefixes
Prefixes in 815
815-200
Chicago
Paetec Communications Inc. - Il
Landline
815-201
Chicago
Bandwidth.com Clec Llc - Il
Landline
815-202
Hickory Hills
New Cingular Wireless Pcs Llc - Il
Wireless
815-203
Hinsdale
Usa Mobility Wireless Inc.
Wireless
815-204
Hinsdale
Usa Mobility Wireless Inc.
Wireless
815-205
Hinsdale
Usa Mobility Wireless Inc.
Wireless
815-206
Woodstock
Ameritech Illinois
Landline
815-207
Hickory Hills
At&t Local
Landline
815-208
Dixon
Mediacom Telephony Of Illinois Llc - Il
Landline
815-209
Rockford
Level 3 Communications Llc - Il
Landline
815-210
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-212
Elgin
T-mobile Usa Inc.
Wireless
815-213
Sterling
United States Cellular Corp. - Illinois
Wireless
815-214
Kankakee
Rcn Telecom Services Of Illinois Inc. - Il
Landline
815-215
Chicago
Globalcom Inc.-il
Landline
815-216
Hickory Hills
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-217
Chicago
Digital Network Access Communications Inc. - Il
Landline
815-218
Rockford
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-219
Lombard
United States Cellular Corp. - Illinois
Wireless
815-220
La Salle
Ameritech Illinois
Landline
815-221
Chicago
Teleport Communications America Llc - Il
Landline
815-222
Rockford
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-223
La Salle
Ameritech Illinois
Landline
815-224
La Salle
Ameritech Illinois
Landline
815-225
Milledgeville
Citizens Telecom Co Illinois-frontier Citizens -il
Landline
815-226
Rockford
Ameritech Illinois
Landline
815-227
Rockford
Ameritech Illinois
Landline
815-228
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-229
Rockford
Ameritech Illinois
Landline
815-230
Arlington Heights
Broadwing Communications Llc - Il
Landline
815-231
Rockford
Ameritech Illinois
Landline
815-232
Freeport
Frontier North Inc. - Il
Landline
815-233
Freeport
Frontier North Inc. - Il
Landline
815-234
Byron
Frontier North Inc. - Il
Landline
815-235
Freeport
Frontier North Inc. - Il
Landline
815-236
Schaumburg
New Cingular Wireless Pcs Llc - Il
Wireless
815-237
Gardner
Ameritech Illinois
Landline
815-238
Freeport
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-239
Pecatonica
Frontier North Inc. - Il
Landline
815-240
Rockford
Charter Fiberlink - Illinois Llc - Il
Landline
815-241
Chicago
American Messaging (am) Inc.
Landline
815-242
Rockford
Usa Mobility Wireless Inc.
Wireless
815-243
Rockford
United States Cellular Corp. - Illinois
Wireless
815-244
Mount Carroll
Gallatin River Communications Dba Centurylink
Landline
815-245
Schaumburg
New Cingular Wireless Pcs Llc - Il
Wireless
815-246
Earlville
Frontier North Inc. - Il
Landline
815-247
Pecatonica
Frontier North Inc. - Il
Landline
815-248
Durand
Frontier North Inc. - Il
Landline
815-249
Grand Ridge
Frontier North Inc. - Il
Landline
815-250
La Salle
Comcast Phone Of Illinois Llc Dba Comco - Il
Landline
815-251
Unknown City
Gallatin River Communications Dba Centurylink
Landline
815-252
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-253
Kempton
Frontier Communications Of Illinois Inc.
Landline
815-254
Plainfield
Ameritech Illinois
Landline
815-255
Chicago
Us Xchange Of Illinois Llc Dba Choice One Comm Il
Landline
815-256
Cabery
Stelle Telephone Co.
Landline
815-257
Streator
Illinois Valley Cellular Rsa 2-ii Partnership
Landline
815-258
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-259
Thomson
Gallatin River Communications Dba Centurylink
Landline
815-260
Schaumburg
United States Cellular Corp. - Illinois
Wireless
815-261
Arlington Heights
Mci Worldcom Communications Inc. - Il
Landline
815-262
Rockford
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-263
Hickory Hills
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-264
Waterman
Frontier North Inc. - Il
Landline
815-265
Gilman
Ameritech Illinois
Landline
815-266
Freeport
Frontier North Inc. - Il
Landline
815-267
Plainfield
Mci Worldcom Communications Inc. - Il
Landline
815-268
Onarga
Ameritech Illinois
Landline
815-269
Chicago
Frontier Communications Of The Carolinas Inc - Il
Landline
815-270
Rockford
Charter Fiberlink - Illinois Llc - Il
Landline
815-271
Elk Grove Village
Mci Worldcom Communications Inc. - Il
Landline
815-272
Elgin
Mci Worldcom Communications Inc. - Il
Landline
815-273
Savanna
Gallatin River Communications Dba Centurylink
Landline
815-274
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-275
Freeport
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-276
Arlington Heights
Teleport Communications America Llc - Il
Landline
815-277
Chicago
Teleport Communications America Llc - Il
Landline
815-278
Kankakee
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-279
Chicago
American Messaging (am) Inc.
Landline
815-280
Chicago
Teleport Communications America Llc - Il
Landline
815-281
Erie
United States Cellular Corp. - Illinois
Wireless
815-282
Loves Park
Ameritech Illinois
Landline
815-283
DeKalb
Mediacom Telephony Of Illinois Llc - Il
Landline
815-284
Dixon
Gallatin River Communications Dba Centurylink
Landline
815-285
Dixon
Gallatin River Communications Dba Centurylink
Landline
815-286
Hinckley
Frontier North Inc. - Il
Landline
815-287
Chicago
Ameritech Illinois
Landline
815-288
Dixon
Gallatin River Communications Dba Centurylink
Landline
815-289
Rockford
United States Cellular Corp. - Illinois
Wireless
815-290
Chicago
Sbc Internet Services Inc.
Landline
815-291
Rockford
United States Cellular Corp. - Illinois
Wireless
815-292
Clinton
Bergen Telephone Co. - Illinois
Landline
815-293
Lockport
Ameritech Illinois
Landline
815-294
Hinsdale
Usa Mobility Wireless Inc.
Wireless
815-295
Elgin
T-mobile Usa Inc.
Wireless
815-296
Rockford
Usa Mobility Wireless Inc.
Wireless
815-297
Freeport
Frontier North Inc. - Il
Landline
815-298
Rockford
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-299
Rockford
United States Cellular Corp. - Illinois
Wireless
815-300
New Lenox
Ameritech Illinois
Landline
815-301
Chicago
Broadwing Communications Llc - Il
Landline
815-302
Aurora
Sprint Spectrum L.p.
Wireless
815-303
Princeton
Illinois Valley Cellular Rsa 2-i Partnership
Landline
815-304
Arlington Heights
Broadwing Communications Llc - Il
Landline
815-305
Arlington Heights
Broadwing Communications Llc - Il
Landline
815-306
Arlington Heights
Broadwing Communications Llc - Il
Landline
815-307
Schaumburg
Broadwing Communications Llc - Il
Landline
815-308
Arlington Heights
Broadwing Communications Llc - Il
Landline
815-309
Shannon
Aero North Communications Inc. - Il
Landline
815-310
Arlington Heights
Broadwing Communications Llc - Il
Landline
815-312
Rockford
Ymax Communications Corp. - Il
Landline
815-313
Chicago
Broadwing Communications Llc - Il
Landline
815-314
Arlington Heights
Broadwing Communications Llc - Il
Landline
815-315
Rockford
Level 3 Communications Llc - Il
Landline
815-316
Machesney Park
Tds Metrocom Inc.-il
Landline
815-317
Chicago
Broadwing Communications Llc - Il
Landline
815-318
Arlington Heights
Broadwing Communications Llc - Il
Landline
815-319
Rockford
United States Cellular Corp. - Illinois
Wireless
815-320
Chicago
Peerless Network Of Illinois Llc - Il
Landline
815-321
Chicago
Xo Illinois Inc.
Landline
815-322
Chicago
Level 3 Communications Llc - Il
Landline
815-323
Rockford
Level 3 Communications Llc - Il
Landline
815-324
Joliet
Mediacom Telephony Of Illinois Llc - Il
Landline
815-325
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-326
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-327
Chicago
Broadwing Communications Llc - Il
Landline
815-328
Chicago
Broadwing Communications Llc - Il
Landline
815-329
Rockford
Sbc Internet Services Inc.
Landline
815-330
Chicago
Globalcom Inc.-il
Landline
815-331
Chicago
Broadwing Communications Llc - Il
Landline
815-332
Rockford
Frontier North Inc. - Il
Landline
815-333
Chicago
Broadwing Communications Llc - Il
Landline
815-334
Woodstock
Ameritech Illinois
Landline
815-335
Winnebago
Frontier North Inc. - Il
Landline
815-336
Sterling
Citizens Telecom Co Illinois-frontier Citizens -il
Landline
815-337
Woodstock
Ameritech Illinois
Landline
815-338
Woodstock
Ameritech Illinois
Landline
815-339
Granville
Frontier North Inc. - Il
Landline
815-340
Peoria
Comcast Phone Of Illinois Llc Dba Comco - Il
Landline
815-341
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-342
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-343
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-344
McHenry
Ameritech Illinois
Landline
815-345
Chicago
Level 3 Communications Llc - Il
Landline
815-346
Chicago
Broadwing Communications Llc - Il
Landline
815-347
Elgin
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-348
Chicago
Us Xchange Of Illinois Llc Dba Choice One Comm Il
Landline
815-349
Oak Brook
Xo Illinois Inc.
Landline
815-350
Sterling
Essex Telcom Inc.
Landline
815-351
Hickory Hills
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-352
Chicago
Broadwing Communications Llc - Il
Landline
815-353
Elgin
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-354
Elgin
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-355
Elgin
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-356
Crystal Lake
Ameritech Illinois
Landline
815-357
Seneca
Ameritech Illinois
Landline
815-358
Cornell
C-r Telephone Co.
Landline
815-359
Harmon
Gallatin River Communications Dba Centurylink
Landline
815-360
Sterling
Essex Telcom Inc.
Landline
815-361
Chicago
Broadwing Communications Llc - Il
Landline
815-362
German Valley
Frontier North Inc. - Il
Landline
815-363
McHenry
Ameritech Illinois
Landline
815-364
Chicago
Broadwing Communications Llc - Il
Landline
815-365
Reddick
Frontier North Inc. - Il
Landline
815-366
Chicago
Broadwing Communications Llc - Il
Landline
815-367
Winslow
Frontier North Inc. - Il
Landline
815-368
Lostant
Frontier North Inc. - Il
Landline
815-369
Lena
Frontier North Inc. - Il
Landline
815-370
Hickory Hills
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-371
Chicago
Broadwing Communications Llc - Il
Landline
815-372
Lockport
Ameritech Illinois
Landline
815-373
Chicago
Us Xchange Of Illinois Llc Dba Choice One Comm Il
Landline
815-374
Chicago
Us Xchange Of Illinois Llc Dba Choice One Comm Il
Landline
815-375
DeKalb
United States Cellular Corp. - Illinois
Wireless
815-376
Ohio
Frontier North Inc. - Il
Landline
815-377
Chicago
Broadwing Communications Llc - Il
Landline
815-378
Rockford
Sprint Spectrum L.p.
Wireless
815-379
Walnut
Frontier North Inc. - Il
Landline
815-380
Sterling
Essex Telcom Inc.
Landline
815-381
Rockford
Ameritech Illinois
Landline
815-382
Schaumburg
New Cingular Wireless Pcs Llc - Il
Wireless
815-383
Willowbrook
New Cingular Wireless Pcs Llc - Il
Wireless
815-384
Rochelle
Frontier North Inc. - Il
Landline
815-385
McHenry
Ameritech Illinois
Landline
815-386
Kankakee
Cellco Partnership Dba Verizon Wireless - Il
Wireless
815-387
Rockford
Ameritech Illinois
Landline
815-388
Buffalo Grove
Sprint Spectrum L.p.
Wireless
815-389
Beloit
Ameritech Illinois
Landline
815-390
Mount Prospect
Comcast Phone Of Illinois Llc Dba Comco - Il
Landline
815-391
Rockford
Ameritech Illinois
Landline
815-392
Kinsman
Kinsman Mutual Telephone Company
Landline
815-393
Monroe Center
Frontier North Inc. - Il
Landline
815-394
Rockford
Ameritech Illinois
Landline
815-395
Rockford
Ameritech Illinois
Landline
815-396
Steward
Frontier North Inc. - Il
Landline
815-397
Rockford
Ameritech Illinois
Landline
815-398
Rockford
Ameritech Illinois
Landline
815-399
Rockford
Ameritech Illinois
Landline
815-400
Dixon
Mediacom Telephony Of Illinois Llc - Il
Landline
815-401
Chicago
Level 3 Communications Llc - Il
Landline

Top prefixes in this area code

815-200→815-201→815-202→815-203→815-204→815-205→815-206→815-207→
Why area code pages matter in reverse phone lookup

Area code pages help visitors understand the wider calling region connected to a number. While a full reverse phone lookup page focuses on one specific caller, an area code page shows the bigger picture by grouping prefixes, cities, and carrier patterns under the same first three digits. This makes it easier to spot whether a number appears local, regional, or part of a service area the visitor already recognizes.

For phone directory websites, area code pages also improve browsing. A user can start with a missed call, discover the number's first three digits, and then move into the related area code to see supporting location data and a list of active prefixes. That layered navigation creates a better research experience and gives visitors more confidence when they continue into a specific number page.