USA Phone Code Guide
USA Phone
Code Guide

Telephone Area +1 (815) XXX-XXXX / Page 7

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: 1234567910
Company District Major City Prefix
Ameritech IllinoisWillJoliet, IL+1 (815) 768-XXXX
Broadwing CommunicationsLa SalleSeneca, IL+1 (815) 769-XXXX
Charter Fiberlink - IllinoisHarvard, IL+1 (815) 770-XXXX
Rcn Telecom Services Of IllinoisIroquoisAshkum, IL+1 (815) 771-XXXX
Citizens Telecom Co Illinois-frontier Citizens -ilWhitesideMorrison, IL+1 (815) 772-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 773-XXXX
Ameritech IllinoisWillJoliet, IL+1 (815) 774-XXXX
Usa Mobility WirelessMchenryWoodstock, IL+1 (815) 775-XXXX
Ameritech IllinoisJo DaviessGalena, IL+1 (815) 776-XXXX
Ameritech IllinoisJo DaviessGalena, IL+1 (815) 777-XXXX
Citizens Telecom Co Illinois-frontier Citizens -ilWhitesideLyndon, IL+1 (815) 778-XXXX
Broadwing CommunicationsLa SalleLa Salle, IL+1 (815) 780-XXXX
Rcn Telecom Services Of IllinoisIroquoisChebanse, IL+1 (815) 781-XXXX
Broadwing CommunicationsWillPlainfield, IL+1 (815) 782-XXXX
Rcn Telecom Services Of IllinoisIroquoisGilman, IL+1 (815) 783-XXXX
Frontier NorthDekalbGenoa, IL+1 (815) 784-XXXX
Rcn Telecom Services Of IllinoisIroquoisWatseka, IL+1 (815) 785-XXXX
Frontier NorthDekalbSandwich, IL+1 (815) 786-XXXX
Frontier NorthDekalbDekalb, IL+1 (815) 787-XXXX
Ameritech IllinoisMchenryCrystal Lake, IL+1 (815) 788-XXXX
Frontier NorthStephensonOrangeville, IL+1 (815) 789-XXXX
Nextel CommunicationsMchenryWoodstock, IL+1 (815) 790-XXXX
Nextel CommunicationsWillJoliet, IL+1 (815) 791-XXXX
Ameritech IllinoisLa SalleHarding, IL+1 (815) 792-XXXX
T-mobile UsaDekalbDekalb, IL+1 (815) 793-XXXX
Marseilles Telephone Co. Of MarseillesLa SalleMarseilles, IL+1 (815) 794-XXXX
Marseilles Telephone Co. Of MarseillesLa SalleMarseilles, IL+1 (815) 795-XXXX
Frontier Communications Of PrairieLivingstonFlanagan, IL+1 (815) 796-XXXX
Level 3 CommunicationsDekalbSomonauk, IL+1 (815) 797-XXXX
Essex TelcomCarrollMilledgeville, IL+1 (815) 798-XXXX
Sprint Communications Company, L.p.WhitesideSterling, IL+1 (815) 799-XXXX
Mediacom Telephony Of IllinoisPoplar Grove, IL+1 (815) 800-XXXX
Aero North CommunicationsStephensonFreeport, IL+1 (815) 801-XXXX
Ameritech IllinoisKankakeeKankakee, IL+1 (815) 802-XXXX
Aero North CommunicationsOgleByron, IL+1 (815) 803-XXXX
Aero North CommunicationsWinnebagoPecatonica, IL+1 (815) 804-XXXX
Aero North CommunicationsWinnebagoDurand, IL+1 (815) 805-XXXX
Ameritech IllinoisWillFrankfort, IL+1 (815) 806-XXXX
Aero North CommunicationsStephensonGerman Valley, IL+1 (815) 807-XXXX
Aero North CommunicationsStephensonWinslow, IL+1 (815) 808-XXXX
Aero North CommunicationsStephensonLena, IL+1 (815) 809-XXXX
Aero North CommunicationsStephensonPearl City, IL+1 (815) 810-XXXX
Aero North CommunicationsStephensonDakota, IL+1 (815) 812-XXXX
Aero North CommunicationsJo DaviessApple River, IL+1 (815) 813-XXXX
T-mobile UsaMchenryWoodstock, IL+1 (815) 814-XXXX
Aero North CommunicationsStephensonDakota, IL+1 (815) 816-XXXX
Aero North CommunicationsJo DaviessHanover, IL+1 (815) 817-XXXX
Aero North CommunicationsJo DaviessWarren, IL+1 (815) 818-XXXX
Aero North CommunicationsStephensonOrangeville, IL+1 (815) 819-XXXX
Aero North CommunicationsJo DaviessElizabeth, IL+1 (815) 820-XXXX
United States Cellular Corp. - IllinoisStephensonFreeport, IL+1 (815) 821-XXXX
New Cingular Wireless PCSLa SalleStreator, IL+1 (815) 822-XXXX
Xo IllinoisWillJoliet, IL+1 (815) 823-XXXX
Frontier NorthDekalbShabbona, IL+1 (815) 824-XXXX
Frontier NorthDekalbMalta, IL+1 (815) 825-XXXX
Cellco Partnership DBA Verizon WirelessDekalbSomonauk, IL+1 (815) 826-XXXX
Frontier NorthKaneMaple Park, IL+1 (815) 827-XXXX
Xo IllinoisGrundyMinooka, IL+1 (815) 828-XXXX
Essex TelcomCarrollChadwick, IL+1 (815) 829-XXXX
New Cingular Wireless PCSLa SalleOglesby, IL+1 (815) 830-XXXX
Aero North CommunicationsStephensonDavis, IL+1 (815) 831-XXXX
Frontier Communications Of IllinoisLivingstonSaunemin, IL+1 (815) 832-XXXX
Aero North CommunicationsStephensonMc Connell, IL+1 (815) 833-XXXX
Ameritech IllinoisWillLockport, IL+1 (815) 834-XXXX
Essex TelcomLeeDixon, IL+1 (815) 835-XXXX
Ameritech IllinoisWillLockport, IL+1 (815) 836-XXXX
Aero North CommunicationsOgleForreston, IL+1 (815) 837-XXXX
Ameritech IllinoisWillLockport, IL+1 (815) 838-XXXX
Xo IllinoisKankakeeKankakee, IL+1 (815) 839-XXXX
Aero North CommunicationsJo DaviessStockton, IL+1 (815) 840-XXXX
Essex TelcomOgleMt Morris, IL+1 (815) 841-XXXX
Frontier NorthLivingstonPontiac, IL+1 (815) 842-XXXX
Essex TelcomLeeAshton, IL+1 (815) 843-XXXX
Frontier NorthLivingstonPontiac, IL+1 (815) 844-XXXX
Frontier NorthJo DaviessScales Mound, IL+1 (815) 845-XXXX
Broadwing CommunicationsWillJoliet, IL+1 (815) 846-XXXX
Sbc Internet ServicesWinnebagoRockford, IL+1 (815) 847-XXXX
Illinois Valley Cellular Rsa 2-i PartnershipLivingstonPontiac, IL+1 (815) 848-XXXX
Frontier NorthLeeSublette, IL+1 (815) 849-XXXX
Aero North CommunicationsWinnebagoPecatonica, IL+1 (815) 850-XXXX

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