Telephone Area 815. Page 1.
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.
Phone numbers +1-815-YYY-YYYY
| Company | District | Major City | Prefix |
|---|---|---|---|
| United States Cellular Corp. - Illinois | Jo Daviess | Galena, IL | +1-815281-SSSS |
| Ameritech Illinois | Winnebago | Loves Park, IL | +1-815282-SSSS |
| Mediacom Telephony Of Illinois | Will | Dekalb, IL | +1-815283-SSSS |
| Gallatin River Communications DBA Centurylink | Lee | Dixon, IL | +1-815284-SSSS |
| Gallatin River Communications DBA Centurylink | Lee | Dixon, IL | +1-815285-SSSS |
| Frontier North | Dekalb | Hinckley, IL | +1-815286-SSSS |
| Ameritech Illinois | Grundy | Verona, IL | +1-815287-SSSS |
| Gallatin River Communications DBA Centurylink | Lee | Dixon, IL | +1-815288-SSSS |
| United States Cellular Corp. - Illinois | Winnebago | Rockford, IL | +1-815289-SSSS |
| Sbc Internet Services | Minooka, IL | +1-815290-SSSS | |
| United States Cellular Corp. - Illinois | Stephenson | Freeport, IL | +1-815291-SSSS |
| Bergen Telephone Co. - Illinois | Boone | South Beloit, IL | +1-815292-SSSS |
| Ameritech Illinois | Will | Romeoville, IL | +1-815293-SSSS |
| Usa Mobility Wireless | Cook | La Grange Park, IL | +1-815294-SSSS |
| T-mobile Usa | Kankakee | Kankakee, IL | +1-815295-SSSS |
| Usa Mobility Wireless | Winnebago | Rockford, IL | +1-815296-SSSS |
| Frontier North | Stephenson | Freeport, IL | +1-815297-SSSS |
| Cellco Partnership DBA Verizon Wireless | Winnebago | Rockford, IL | +1-815298-SSSS |
| United States Cellular Corp. - Illinois | Winnebago | Rockford, IL | +1-815299-SSSS |
| Ameritech Illinois | Cook | Chicago, IL | +1-815300-SSSS |
| Broadwing Communications | Mchenry | Crystal Lake, IL | +1-815301-SSSS |
| Sprint Spectrum L.p. | Will | Joliet, IL | +1-815302-SSSS |
| Illinois Valley Cellular Rsa 2-i Partnership | Bureau | Princeton, IL | +1-815303-SSSS |
| Broadwing Communications | Kankakee | Kankakee, IL | +1-815304-SSSS |
| Broadwing Communications | Grundy | Gardner, IL | +1-815305-SSSS |
| Broadwing Communications | Will | Lockport, IL | +1-815306-SSSS |
| Broadwing Communications | Mchenry | Mchenry, IL | +1-815307-SSSS |
| Broadwing Communications | Mchenry | Woodstock, IL | +1-815308-SSSS |
| Aero North Communications | Shannon, IL | +1-815309-SSSS | |
| Broadwing Communications | La Salle | Utica, IL | +1-815310-SSSS |
| Ymax Communications Corp. | Rockford, IL | +1-815312-SSSS | |
| Broadwing Communications | La Salle | Ottawa, IL | +1-815313-SSSS |
| Broadwing Communications | Will | Manhattan, IL | +1-815314-SSSS |
| Level 3 Communications | Winnebago | Rockford, IL | +1-815315-SSSS |
| Tds Metrocom Inc.-il | Winnebago | Rockford, IL | +1-815316-SSSS |
| Broadwing Communications | Iroquois | Crescent City, IL | +1-815317-SSSS |
| Broadwing Communications | Grundy | Morris, IL | +1-815318-SSSS |
| United States Cellular Corp. - Illinois | Winnebago | Rockford, IL | +1-815319-SSSS |
| Peerless Network Of Illinois | Kankakee | Kankakee, IL | +1-815320-SSSS |
| Xo Illinois | Mchenry | Woodstock, IL | +1-815321-SSSS |
| Level 3 Communications | Mchenry | Mchenry, IL | +1-815322-SSSS |
| Level 3 Communications | Boone | Belvidere, IL | +1-815323-SSSS |
| Mediacom Telephony Of Illinois | Will | Ottawa, IL | +1-815324-SSSS |
| New Cingular Wireless PCS | Will | Joliet, IL | +1-815325-SSSS |
| New Cingular Wireless PCS | La Salle | Oglesby, IL | +1-815326-SSSS |
| Broadwing Communications | Will | Plainfield, IL | +1-815327-SSSS |
| Broadwing Communications | Will | Lockport, IL | +1-815328-SSSS |
| Usa Mobility Wireless | La Salle | La Salle, IL | +1-815329-SSSS |
| Globalcom-il | Iroquois | Crescent City, IL | +1-815330-SSSS |
| Broadwing Communications | Mchenry | Mchenry, IL | +1-815331-SSSS |
| Frontier North | Winnebago | Cherry Valley, IL | +1-815332-SSSS |
| Broadwing Communications | Mchenry | Woodstock, IL | +1-815333-SSSS |
| Ameritech Illinois | Mchenry | Woodstock, IL | +1-815334-SSSS |
| Frontier North | Winnebago | Winnebago, IL | +1-815335-SSSS |
| Citizens Telecom Co Illinois-frontier Citizens -il | Carroll | Milledgeville, IL | +1-815336-SSSS |
| Ameritech Illinois | Mchenry | Woodstock, IL | +1-815337-SSSS |
| Ameritech Illinois | Mchenry | Woodstock, IL | +1-815338-SSSS |
| Frontier North | Putnam | Granville, IL | +1-815339-SSSS |
| Comcast Phone Of Illinois DBA Comco | La Moille, IL | +1-815340-SSSS | |
| New Cingular Wireless PCS | Will | Joliet, IL | +1-815341-SSSS |
| New Cingular Wireless PCS | Will | Joliet, IL | +1-815342-SSSS |
| New Cingular Wireless PCS | La Salle | Oglesby, IL | +1-815343-SSSS |
| Ameritech Illinois | Mchenry | Mchenry, IL | +1-815344-SSSS |
| Level 3 Communications | Mchenry | Woodstock, IL | +1-815345-SSSS |
| Broadwing Communications | Grundy | Gardner, IL | +1-815346-SSSS |
| Cellco Partnership DBA Verizon Wireless | Mchenry | Woodstock, IL | +1-815347-SSSS |
| Us Xchange Of Illinois LLC DBA Choice One Comm Il | Will | Kankakee, IL | +1-815348-SSSS |
| Xo Illinois | Mchenry | Mchenry, IL | +1-815349-SSSS |
| Essex Telcom | Lee | Franklin Grove, IL | +1-815350-SSSS |
| Cellco Partnership DBA Verizon Wireless | Kankakee | Kankakee, IL | +1-815351-SSSS |
| Broadwing Communications | Kankakee | Kankakee, IL | +1-815352-SSSS |
| Cellco Partnership DBA Verizon Wireless | Mchenry | Woodstock, IL | +1-815353-SSSS |
| Cellco Partnership DBA Verizon Wireless | Mchenry | Woodstock, IL | +1-815354-SSSS |
| Cellco Partnership DBA Verizon Wireless | Mchenry | Woodstock, IL | +1-815355-SSSS |
| Ameritech Illinois | Mchenry | Crystal Lake, IL | +1-815356-SSSS |
| Ameritech Illinois | La Salle | Seneca, IL | +1-815357-SSSS |
| C-r Telephone Co. | Livingston | Cornell, IL | +1-815358-SSSS |
| Gallatin River Communications DBA Centurylink | Lee | Harmon, IL | +1-815359-SSSS |
| Essex Telcom | Lee | Sublette, IL | +1-815360-SSSS |
| Broadwing Communications | Will | Manhattan, IL | +1-815361-SSSS |
