Telephone Area +1 (815) XXX-XXXX / Page 5
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.
Phone numbers +1 (815) XXX-XXXX
| Company | District | Major City | Prefix |
|---|---|---|---|
| Level 3 Communications | Kankakee | Grant Park, IL | +1 (815) 605-XXXX |
| Globalcom-il | La Salle | Ottawa, IL | +1 (815) 606-XXXX |
| Bitwise Communications | Livingston | Flanagan, IL | +1 (815) 607-XXXX |
| T-mobile Usa | Winnebago | Rockford, IL | +1 (815) 608-XXXX |
| Ameritech Illinois | Will | Plainfield, IL | +1 (815) 609-XXXX |
| Bitwise Communications | Livingston | Cornell, IL | +1 (815) 610-XXXX |
| Bitwise Communications | Livingston | Graymont, IL | +1 (815) 612-XXXX |
| Essex Telcom | Carroll | Mt Carroll, IL | +1 (815) 613-XXXX |
| Broadwing Communications | Kankakee | Kankakee, IL | +1 (815) 614-XXXX |
| Level 3 Communications | La Salle | Mendota, IL | +1 (815) 615-XXXX |
| T-mobile Usa | Stephenson | Freeport, IL | +1 (815) 616-XXXX |
| AT&T Local | La Salle | Ottawa, IL | +1 (815) 617-XXXX |
| New Cingular Wireless PCS | Freeport, IL | +1 (815) 618-XXXX | |
| Aero North Communications | Winnebago | Rockton, IL | +1 (815) 619-XXXX |
| Essex Telcom | Whiteside | Prophetstown, IL | +1 (815) 620-XXXX |
| Sprint Spectrum L.p. | Winnebago | Rockford, IL | +1 (815) 621-XXXX |
| Ameritech Illinois | Whiteside | Sterling, IL | +1 (815) 622-XXXX |
| Frontier North | Winnebago | Roscoe, IL | +1 (815) 623-XXXX |
| Frontier North | Winnebago | Rockton, IL | +1 (815) 624-XXXX |
| Ameritech Illinois | Whiteside | Sterling, IL | +1 (815) 625-XXXX |
| Ameritech Illinois | Whiteside | Sterling, IL | +1 (815) 626-XXXX |
| Frontier North | Lee | Paw Paw, IL | +1 (815) 627-XXXX |
| Frontier North | Lee | West Brooklyn, IL | +1 (815) 628-XXXX |
| Frontier North | Winnebago | Durand, IL | +1 (815) 629-XXXX |
| T-mobile Usa | Joliet, IL | +1 (815) 630-XXXX | |
| Ameritech Illinois | Whiteside | Sterling, IL | +1 (815) 631-XXXX |
| Ameritech Illinois | Whiteside | Sterling, IL | +1 (815) 632-XXXX |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1 (815) 633-XXXX |
| Ameritech Illinois | Grundy | Coal City, IL | +1 (815) 634-XXXX |
| Frontier North | Livingston | Chatsworth, IL | +1 (815) 635-XXXX |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1 (815) 636-XXXX |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1 (815) 637-XXXX |
| Frontier North | Bureau | La Moille, IL | +1 (815) 638-XXXX |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1 (815) 639-XXXX |
| Teleport Communications Group - Chicago | La Salle | Ottawa, IL | +1 (815) 640-XXXX |
| Cellco Partnership DBA Verizon Wireless | Rockford, IL | +1 (815) 641-XXXX | |
| Broadwing Communications | Grundy | Minooka, IL | +1 (815) 642-XXXX |
| Frontier North | Bureau | Malden, IL | +1 (815) 643-XXXX |
| Rcn Telecom Services Of Illinois | Iroquois | Crescent City, IL | +1 (815) 644-XXXX |
| Frontier North | Ogle | Stillman Valley, IL | +1 (815) 645-XXXX |
| Frontier North | Bureau | Tiskilwa, IL | +1 (815) 646-XXXX |
| Sprint Communications Company, L.p. | Livingston | Cullom, IL | +1 (815) 647-XXXX |
| Frontier North | Mchenry | Hebron, IL | +1 (815) 648-XXXX |
| Rcn Telecom Services Of Illinois | Grundy | Gardner, IL | +1 (815) 649-XXXX |
| AT&T Local | Stephenson | Freeport, IL | +1 (815) 650-XXXX |
| Rcn Telecom Services Of Illinois | Will | Joliet, IL | +1 (815) 651-XXXX |
| Gallatin River Communications DBA Centurylink | Lee | Dixon, IL | +1 (815) 652-XXXX |
| Frontier North | Mchenry | Wonder Lake, IL | +1 (815) 653-XXXX |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1 (815) 654-XXXX |
| Essex Telcom | Carroll | Milledgeville, IL | +1 (815) 655-XXXX |
| Level 3 Communications | Stephenson | Freeport, IL | +1 (815) 656-XXXX |
| Ameritech Illinois | Livingston | Forrest, IL | +1 (815) 657-XXXX |
| Essex Telcom | Carroll | Lanark, IL | +1 (815) 658-XXXX |
| Frontier North | Putnam | Hennepin, IL | +1 (815) 659-XXXX |
| Rcn Telecom Services Of Illinois | Will | Lockport, IL | +1 (815) 660-XXXX |
| Rcn Telecom Services Of Illinois | Grundy | Morris, IL | +1 (815) 661-XXXX |
| Level 3 Communications | Kankakee | Momence, IL | +1 (815) 662-XXXX |
| Frontier North | Bureau | Spring Valley, IL | +1 (815) 663-XXXX |
| Frontier North | Bureau | Spring Valley, IL | +1 (815) 664-XXXX |
| Rcn Telecom Services Of Illinois | La Salle | Ottawa, IL | +1 (815) 665-XXXX |
| Cellco Partnership DBA Verizon Wireless | Joliet, IL | +1 (815) 666-XXXX | |
| Ameritech Illinois | La Salle | Utica, IL | +1 (815) 667-XXXX |
| Neutral Tandem-illinois | Will | Rockford, IL | +1 (815) 668-XXXX |
| Level 3 Communications | Mchenry | Mchenry, IL | +1 (815) 669-XXXX |
| Sprint Spectrum L.p. | Winnebago | Rockford, IL | +1 (815) 670-XXXX |
| Level 3 Communications | Will | Joliet, IL | +1 (815) 671-XXXX |
| Frontier North | La Salle | Streator, IL | +1 (815) 672-XXXX |
| Frontier North | La Salle | Streator, IL | +1 (815) 673-XXXX |
| New Cingular Wireless PCS | La Salle | Streator, IL | +1 (815) 674-XXXX |
| Frontier North | Mchenry | Spring Grove, IL | +1 (815) 675-XXXX |
| Level 3 Communications | Will | Plainfield, IL | +1 (815) 676-XXXX |
| Cellco Partnership DBA Verizon Wireless | Jo Daviess | Elizabeth, IL | +1 (815) 677-XXXX |
| Frontier North | Mchenry | Richmond, IL | +1 (815) 678-XXXX |
| Rcn Telecom Services Of Illinois | Mchenry | Mchenry, IL | +1 (815) 679-XXXX |
| Rcn Telecom Services Of Illinois | Will | Manhattan, IL | +1 (815) 680-XXXX |
| Cellco Partnership DBA Verizon Wireless | Winnebago | Rockford, IL | +1 (815) 681-XXXX |
| Frontier Communications Of The Carolinas, Inc | Iroquois | Milford, IL | +1 (815) 682-XXXX |
| Ameritech Illinois | Iroquois | Crescent City, IL | +1 (815) 683-XXXX |
| Citizens Telecom Co Illinois-frontier Citizens -il | Carroll | Chadwick, IL | +1 (815) 684-XXXX |
| New Cingular Wireless PCS | Will | Joliet, IL | +1 (815) 685-XXXX |
