USA Phone Code Guide
USA Phone
Code Guide

Telephone Area +1 (815) XXX-XXXX / Page 6

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: 1234568910
Company District Major City Prefix
Frontier NorthFordPiper City, IL+1 (815) 686-XXXX
Rcn Telecom Services Of IllinoisMchenryWoodstock, IL+1 (815) 687-XXXX
Frontier NorthLivingstonStrawn, IL+1 (815) 688-XXXX
Frontier Communications Of IllinoisLivingstonCullom, IL+1 (815) 689-XXXX
United States Cellular Corp. - IllinoisWillJoliet, IL+1 (815) 690-XXXX
Rcn Telecom Services Of IllinoisLa SalleUtica, IL+1 (815) 691-XXXX
Frontier NorthLivingstonFairbury, IL+1 (815) 692-XXXX
Nextel CommunicationsWillJoliet, IL+1 (815) 693-XXXX
Frontier NorthIroquoisClifton, IL+1 (815) 694-XXXX
Ameritech IllinoisKendallNewark, IL+1 (815) 695-XXXX
Aero North CommunicationsWinnebagoRoscoe, IL+1 (815) 696-XXXX
Frontier NorthIroquoisChebanse, IL+1 (815) 697-XXXX
Frontier NorthIroquoisAshkum, IL+1 (815) 698-XXXX
Frontier NorthBureauWyanet, IL+1 (815) 699-XXXX
Level 3 CommunicationsMchenryWoodstock, IL+1 (815) 701-XXXX
Sprint Communications Company, L.p.LivingstonSaunemin, IL+1 (815) 702-XXXX
Nextel CommunicationsWinnebagoRockford, IL+1 (815) 703-XXXX
Mcleodusa Telecommunications Services- IlWinnebagoBeloit, IL+1 (815) 704-XXXX
Teleport Communications Group - ChicagoGrundyMorris, IL+1 (815) 705-XXXX
Essex TelcomWhitesideLyndon, IL+1 (815) 706-XXXX
Level 3 CommunicationsIroquoisGilman, IL+1 (815) 707-XXXX
Comcast Phone Of Illinois DBA ComcoRockford, IL+1 (815) 708-XXXX
Level 3 CommunicationsGrundyCoal City, IL+1 (815) 709-XXXX
AT&T LocalGrundyMorris, IL+1 (815) 710-XXXX
Nextel CommunicationsMchenryHarvard, IL+1 (815) 712-XXXX
New Cingular Wireless PCSWinnebagoRockford, IL+1 (815) 713-XXXX
Sprint Communications Company, L.p.WillJoliet, IL+1 (815) 714-XXXX
New Cingular Wireless PCSWillJoliet, IL+1 (815) 715-XXXX
Nextel CommunicationsWhitesideSterling, IL+1 (815) 716-XXXX
Broadwing CommunicationsWillNew Lenox, IL+1 (815) 717-XXXX
United States Cellular Corp. - IllinoisWhitesideSterling, IL+1 (815) 718-XXXX
Nextel CommunicationsBureauPrinceton, IL+1 (815) 719-XXXX
Ameritech IllinoisWinnebagoRockford, IL+1 (815) 720-XXXX
AT&T LocalWinnebagoRockford, IL+1 (815) 721-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 722-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 723-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 724-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 725-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 726-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 727-XXXX
Frontier NorthMchenryWonder Lake, IL+1 (815) 728-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 729-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 730-XXXX
Ameritech IllinoisPlainfield, IL+1 (815) 731-XXXX
Frontier NorthOgleOregon, IL+1 (815) 732-XXXX
Rcn Telecom Services Of IllinoisWillPlainfield, IL+1 (815) 733-XXXX
Frontier NorthOgleMt Morris, IL+1 (815) 734-XXXX
New Cingular Wireless PCSWillJoliet, IL+1 (815) 735-XXXX
Ameritech IllinoisKendallLisbon, IL+1 (815) 736-XXXX
Sharon Telephone Co. - IllinoisBooneCapron, IL+1 (815) 737-XXXX
Leaf River Telephone Co.OgleLeaf River, IL+1 (815) 738-XXXX
Nextel CommunicationsDekalbSycamore, IL+1 (815) 739-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 740-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 741-XXXX
United States Cellular Corp. - IllinoisWinnebagoRockford, IL+1 (815) 742-XXXX
Frontier Communications Of PrairieLivingstonGraymont, IL+1 (815) 743-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 744-XXXX
Frontier NorthJo DaviessWarren, IL+1 (815) 745-XXXX
Marseilles Telephone Co. Of MarseillesDekalbMarseilles, IL+1 (815) 746-XXXX
Citizens Telecom Co Illinois-frontier Citizens -ilJo DaviessEast Dubuque, IL+1 (815) 747-XXXX
Frontier NorthDekalbDekalb, IL+1 (815) 748-XXXX
Answer America DBA Answer UsaWinnebagoRockford, IL+1 (815) 749-XXXX
Marseilles Telephone Co. Of MarseillesLa SalleMarseilles, IL+1 (815) 750-XXXX
Cellco Partnership DBA Verizon WirelessDekalbDekalb, IL+1 (815) 751-XXXX
Frontier NorthDekalbDekalb, IL+1 (815) 752-XXXX
Frontier NorthDekalbDekalb, IL+1 (815) 753-XXXX
Frontier NorthDekalbDekalb, IL+1 (815) 754-XXXX
American Messaging (am)DekalbDekalb, IL+1 (815) 755-XXXX
Frontier NorthDekalbDekalb, IL+1 (815) 756-XXXX
United States Cellular Corp. - IllinoisDekalbDekalb, IL+1 (815) 757-XXXX
Frontier NorthDekalbDekalb, IL+1 (815) 758-XXXX
Ameritech IllinoisMchenryMchenry, IL+1 (815) 759-XXXX
Cellco Partnership DBA Verizon WirelessPutnamHennepin, IL+1 (815) 760-XXXX
Cellco Partnership DBA Verizon WirelessDekalbDekalb, IL+1 (815) 761-XXXX
Cellco Partnership DBA Verizon WirelessDekalbDekalb, IL+1 (815) 762-XXXX
Answer America DBA Answer UsaWinnebagoRockford, IL+1 (815) 763-XXXX
United States Cellular Corp. - IllinoisDekalbDekalb, IL+1 (815) 764-XXXX
Frontier NorthBoonePoplar Grove, IL+1 (815) 765-XXXX
United States Cellular Corp. - IllinoisDekalbDekalb, IL+1 (815) 766-XXXX
American Messaging (am)CookLa Grange Park, IL+1 (815) 767-XXXX

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