Telephone Area 815. Page 2.
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 |
|---|---|---|---|
| Frontier North | Stephenson | German Valley, IL | +1-815362-SSSS |
| Ameritech Illinois | Mchenry | Mchenry, IL | +1-815363-SSSS |
| Broadwing Communications | Grundy | Morris, IL | +1-815364-SSSS |
| Frontier North | Kankakee | Reddick, IL | +1-815365-SSSS |
| Broadwing Communications | La Salle | Ottawa, IL | +1-815366-SSSS |
| Frontier North | Stephenson | Winslow, IL | +1-815367-SSSS |
| Frontier North | La Salle | Lostant, IL | +1-815368-SSSS |
| Frontier North | Stephenson | Lena, IL | +1-815369-SSSS |
| Cellco Partnership DBA Verizon Wireless | Kankakee | Kankakee, IL | +1-815370-SSSS |
| Broadwing Communications | La Salle | Utica, IL | +1-815371-SSSS |
| Ameritech Illinois | Will | Romeoville, IL | +1-815372-SSSS |
| Us Xchange Of Illinois LLC DBA Choice One Comm Il | Will | Elwood, IL | +1-815373-SSSS |
| Us Xchange Of Illinois LLC DBA Choice One Comm Il | Will | Dwight, IL | +1-815374-SSSS |
| United States Cellular Corp. - Illinois | Dekalb | Dekalb, IL | +1-815375-SSSS |
| Frontier North | Bureau | Ohio, IL | +1-815376-SSSS |
| Broadwing Communications | Iroquois | Crescent City, IL | +1-815377-SSSS |
| Nextel Communications | Winnebago | Rockford, IL | +1-815378-SSSS |
| Frontier North | Bureau | Walnut, IL | +1-815379-SSSS |
| Essex Telcom | Whiteside | Sterling, IL | +1-815380-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815381-SSSS |
| New Cingular Wireless PCS | Mchenry | Woodstock, IL | +1-815382-SSSS |
| New Cingular Wireless PCS | Iroquois | Crescent City, IL | +1-815383-SSSS |
| Frontier North | Dekalb | Malta, IL | +1-815384-SSSS |
| Ameritech Illinois | Mchenry | Mchenry, IL | +1-815385-SSSS |
| Cellco Partnership DBA Verizon Wireless | Kankakee | Kankakee, IL | +1-815386-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815387-SSSS |
| Nextel Communications | Mchenry | Mchenry, IL | +1-815388-SSSS |
| Ameritech Illinois | Winnebago | Beloit, IL | +1-815389-SSSS |
| Comcast Phone Of Illinois DBA Comco | Will | Braidwood, IL | +1-815390-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815391-SSSS |
| Kinsman Mutual Telephone Company | Grundy | Kinsman, IL | +1-815392-SSSS |
| Frontier North | Ogle | Monroe Center, IL | +1-815393-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815394-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815395-SSSS |
| Frontier North | Lee | Steward, IL | +1-815396-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815397-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815398-SSSS |
| Ameritech Illinois | Winnebago | Rockford, IL | +1-815399-SSSS |
| Mediacom Telephony Of Illinois | Winnebago | Morrison, IL | +1-815400-SSSS |
| Level 3 Communications | Kankakee | Kankakee, IL | +1-815401-SSSS |
| Sprint Communications Company, L.p. | Jo Daviess | Galena, IL | +1-815402-SSSS |
| Sprint Spectrum L.p. | Mchenry | Mchenry, IL | +1-815403-SSSS |
| Sprint Spectrum L.p. | Mchenry | Crystal Lake, IL | +1-815404-SSSS |
| Nextel Communications | Will | Joliet, IL | +1-815405-SSSS |
| Frontier North | Ogle | Byron, IL | +1-815406-SSSS |
| Ameritech Illinois | Will | Romeoville, IL | +1-815407-SSSS |
| Globalcom-il | La Salle | Utica, IL | +1-815408-SSSS |
| Cellco Partnership DBA Verizon Wireless | Will | Joliet, IL | +1-815409-SSSS |
| Level 3 Communications | La Salle | La Salle, IL | +1-815410-SSSS |
| Broadwing Communications | Will | Frankfort, IL | +1-815412-SSSS |
| Globalcom-il | Grundy | Morris, IL | +1-815413-SSSS |
| New Cingular Wireless PCS | La Salle | Earlville, IL | +1-815414-SSSS |
| Ameritech Illinois | La Salle | Seneca, IL | +1-815415-SSSS |
| Ameritech Illinois | Grundy | Morris, IL | +1-815416-SSSS |
| Ameritech Illinois | Will | Braidwood, IL | +1-815417-SSSS |
| Globalcom-il | Will | Manhattan, IL | +1-815418-SSSS |
| AT&T Local | Livingston | Pontiac, IL | +1-815419-SSSS |
| Essex Telcom | Dekalb | Malta, IL | +1-815420-SSSS |
| Ameritech Illinois | Kankakee | Herscher, IL | +1-815421-SSSS |
| Ameritech Illinois | Kankakee | St Anne, IL | +1-815422-SSSS |
| Ameritech Illinois | Will | Elwood, IL | +1-815423-SSSS |
| Ameritech Illinois | Will | Elwood, IL | +1-815424-SSSS |
| Broadwing Communications | Mchenry | Crystal Lake, IL | +1-815425-SSSS |
| Ameritech Illinois | Kankakee | Herscher, IL | +1-815426-SSSS |
| Ameritech Illinois | Kankakee | St Anne, IL | +1-815427-SSSS |
| Frontier North | Iroquois | Martinton, IL | +1-815428-SSSS |
| Frontier North | Iroquois | Sheldon, IL | +1-815429-SSSS |
| Globalcom-il | Mchenry | Mchenry, IL | +1-815430-SSSS |
| Ameritech Illinois | La Salle | Ottawa, IL | +1-815431-SSSS |
| Ameritech Illinois | Iroquois | Watseka, IL | +1-815432-SSSS |
| Ameritech Illinois | La Salle | Ottawa, IL | +1-815433-SSSS |
| Ameritech Illinois | La Salle | Ottawa, IL | +1-815434-SSSS |
| Frontier North | Iroquois | Beaverville, IL | +1-815435-SSSS |
| Ameritech Illinois | Will | Plainfield, IL | +1-815436-SSSS |
| Frontier North | Putnam | Putnam, IL | +1-815437-SSSS |
| Citizens Telecom Co Illinois-frontier Citizens -il | Whiteside | Tampico, IL | +1-815438-SSSS |
| Ameritech Illinois | Will | Plainfield, IL | +1-815439-SSSS |
| Cellco Partnership DBA Verizon Wireless | Lee | Dixon, IL | +1-815440-SSSS |
| Cellco Partnership DBA Verizon Wireless | Whiteside | Sterling, IL | +1-815441-SSSS |
| Tonica Telephone Co. | La Salle | Tonica, IL | +1-815442-SSSS |
