USA Phone Code Guide
USA Phone
Code Guide

Telephone Area +1 (815) XXX-XXXX / Page 3

Phone numbers of the state Illinois
Prefix: +1815
This prefix is distributed within the state Illinois
The largest city in the region is Rockford
Time Zone: Central
Winter time: UTC-6
Summer time: UTC-5
Below on the map, there is indicated the largest city in the telephone area +1-815-...-.... Illinois Rockford.

In the United States, telephone numbers are divided into a country code (+1), an area code (or prefix), which is three digits long, and a subscriber number (seven digits). These are just a few examples, and there are over 300 area codes in the United States. Each code can cover both large cities and less populated areas depending on population density and telephone network distribution.

The table below shows the main major cities and telecom operators.

If you notice any errors of any community’s location on the map, please report it via the feedback form.

Phone numbers +1 (815) XXX-XXXX

Other pages: 1235678910
Company District Major City Prefix
Frontier NorthStephensonPearl City, IL+1 (815) 443-XXXX
Ameritech IllinoisMchenryCrystal Lake, IL+1 (815) 444-XXXX
Frontier NorthBureauSheffield, IL+1 (815) 445-XXXX
Frontier NorthLa SalleOglesby, IL+1 (815) 446-XXXX
Frontier Communications Of DepueBureauSpring Valley, IL+1 (815) 447-XXXX
Ameritech IllinoisGrundyMazon, IL+1 (815) 448-XXXX
Frontier NorthStephensonDakota, IL+1 (815) 449-XXXX
New Cingular Wireless PCSKankakeeMomence, IL+1 (815) 450-XXXX
New Cingular Wireless PCSMchenryWoodstock, IL+1 (815) 451-XXXX
Frontier NorthMarshallToluca, IL+1 (815) 452-XXXX
Frontier NorthLeeAshton, IL+1 (815) 453-XXXX
Frontier NorthBureauSheffield, IL+1 (815) 454-XXXX
Ameritech IllinoisMchenryCrystal Lake, IL+1 (815) 455-XXXX
Frontier NorthLeeFranklin Grove, IL+1 (815) 456-XXXX
Frontier Communications Of The Carolinas, IncIroquoisCissna Park, IL+1 (815) 457-XXXX
Ameritech IllinoisWillBraidwood, IL+1 (815) 458-XXXX
Ameritech IllinoisMchenryCrystal Lake, IL+1 (815) 459-XXXX
Globalcom-ilWillJoliet, IL+1 (815) 460-XXXX
Broadwing CommunicationsWillLockport, IL+1 (815) 461-XXXX
Ameritech IllinoisWillNew Lenox, IL+1 (815) 462-XXXX
Ameritech IllinoisWillNew Lenox, IL+1 (815) 463-XXXX
Ameritech IllinoisWillFrankfort, IL+1 (815) 464-XXXX
Ameritech IllinoisKankakeeGrant Park, IL+1 (815) 465-XXXX
Ameritech IllinoisKankakeeGrant Park, IL+1 (815) 466-XXXX
Ameritech IllinoisGrundyMinooka, IL+1 (815) 467-XXXX
Ameritech IllinoisKankakeeManteno, IL+1 (815) 468-XXXX
Ameritech IllinoisWillFrankfort, IL+1 (815) 469-XXXX
Ameritech IllinoisWinnebagoRockford, IL+1 (815) 470-XXXX
Illinois Valley Cellular Rsa 2-i PartnershipIroquoisWatseka, IL+1 (815) 471-XXXX
Ameritech IllinoisKankakeeMomence, IL+1 (815) 472-XXXX
Frontier Communications Of The Carolinas, IncIroquoisWatseka, IL+1 (815) 473-XXXX
New Cingular Wireless PCSWillJoliet, IL+1 (815) 474-XXXX
Ameritech IllinoisKendallYorkville, IL+1 (815) 475-XXXX
Ameritech IllinoisWillWilmington, IL+1 (815) 476-XXXX
Ameritech IllinoisMchenryCrystal Lake, IL+1 (815) 477-XXXX
Ameritech IllinoisWillManhattan, IL+1 (815) 478-XXXX
Ameritech IllinoisMchenryCrystal Lake, IL+1 (815) 479-XXXX
Usa Mobility WirelessWinnebagoRockford, IL+1 (815) 480-XXXX
Illinois Valley Cellular Rsa 2-i PartnershipCookLa Grange Park, IL+1 (815) 481-XXXX
Nextel CommunicationsMchenryWoodstock, IL+1 (815) 482-XXXX
Sprint Spectrum L.p.WillJoliet, IL+1 (815) 483-XXXX
Ameritech IllinoisWinnebagoRockford, IL+1 (815) 484-XXXX
Ameritech IllinoisWillNew Lenox, IL+1 (815) 485-XXXX
Frontier NorthIroquoisDonovan, IL+1 (815) 486-XXXX
Globalcom-ilWillPlainfield, IL+1 (815) 487-XXXX
Illinois Valley Cellular Rsa 2-i PartnershipCookLa Grange Park, IL+1 (815) 488-XXXX
Ameritech IllinoisWinnebagoRockford, IL+1 (815) 489-XXXX
Ameritech IllinoisWinnebagoRockford, IL+1 (815) 490-XXXX
Usa Mobility WirelessWillJoliet, IL+1 (815) 491-XXXX
Frontier NorthJo DaviessApple River, IL+1 (815) 492-XXXX
Citizens Telecom Co Illinois-frontier Citizens -ilCarrollLanark, IL+1 (815) 493-XXXX
United States Cellular Corp. - IllinoisWinnebagoRockford, IL+1 (815) 494-XXXX
Frontier NorthLa SalleLeland, IL+1 (815) 495-XXXX
Frontier NorthLa SalleSheridan, IL+1 (815) 496-XXXX
Frontier NorthLeeCompton, IL+1 (815) 497-XXXX
Frontier NorthDekalbSomonauk, IL+1 (815) 498-XXXX
United States Cellular Corp. - IllinoisWhitesideSterling, IL+1 (815) 499-XXXX
Sprint Communications Company, L.p.Marseilles, IL+1 (815) 500-XXXX
Sprint Spectrum L.p.DekalbDekalb, IL+1 (815) 501-XXXX
Globalcom-ilMchenryWoodstock, IL+1 (815) 502-XXXX
Sprint Spectrum L.p.La SalleMendota, IL+1 (815) 503-XXXX
Globalcom-ilGrundyGardner, IL+1 (815) 504-XXXX
T-mobile UsaWinnebagoRockford, IL+1 (815) 505-XXXX
Level 3 CommunicationsMchenryUnion, IL+1 (815) 506-XXXX
Level 3 CommunicationsKankakeeMomence, IL+1 (815) 507-XXXX
New Cingular Wireless PCSDekalbDekalb, IL+1 (815) 508-XXXX
Nextel CommunicationsWinnebagoRockford, IL+1 (815) 509-XXXX
Mediacom Telephony Of IllinoisWillStreator, IL+1 (815) 510-XXXX
Globalcom-ilWillLockport, IL+1 (815) 512-XXXX
Level 3 CommunicationsGrundyMorris, IL+1 (815) 513-XXXX
Nextel CommunicationsWillJoliet, IL+1 (815) 514-XXXX
Level 3 CommunicationsIroquoisWatseka, IL+1 (815) 515-XXXX
Nextel CommunicationsWinnebagoRockford, IL+1 (815) 516-XXXX
Mci Worldcom CommunicationsDekalbDekalb, IL+1 (815) 517-XXXX
Globalcom-ilGrundyCoal City, IL+1 (815) 518-XXXX
Sprint Spectrum L.p.WinnebagoRockford, IL+1 (815) 519-XXXX
Cellco Partnership DBA Verizon WirelessWinnebagoRockford, IL+1 (815) 520-XXXX
Ameritech IllinoisGrundyMinooka, IL+1 (815) 521-XXXX
Frontier NorthDekalbKirkland, IL+1 (815) 522-XXXX
Teleport Communications Group - ChicagoKankakeeKankakee, IL+1 (815) 523-XXXX

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