Telephone Area +1 (312) XXX-XXXX / Page 8
Prefix: +1312
This prefix is distributed within the state Illinois
The largest city in the region is Chicago
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 +1-312-...-.... Illinois Chicago.
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 (312) XXX-XXXX
| Company | District | Major City | Prefix |
|---|---|---|---|
| Sprint Spectrum L.p. | Cook | Chicago, IL | +1 (312) 933-XXXX |
| Cook | +1 (312) 934-XXXX | ||
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 935-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 936-XXXX |
| Cook | +1 (312) 937-XXXX | ||
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 938-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 939-XXXX |
| Cook | +1 (312) 940-XXXX | ||
| Usa Mobility Wireless | Cook | Chicago, IL | +1 (312) 941-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 942-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 943-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 944-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 945-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 946-XXXX |
| Ameritech Illinois | Chicago, IL | +1 (312) 947-XXXX | |
| Ovation Communications Of Illinois | Cook | Chicago, IL | +1 (312) 948-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 949-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 951-XXXX |
| New Cingular Wireless PCS | Cook | Chicago, IL | +1 (312) 952-XXXX |
| New Cingular Wireless PCS | Cook | Chicago, IL | +1 (312) 953-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 954-XXXX |
| Rcn Telecom Services Of Illinois | Cook | Chicago, IL | +1 (312) 955-XXXX |
| Cook | +1 (312) 956-XXXX | ||
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 957-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 960-XXXX |
| New Cingular Wireless PCS | Cook | Chicago, IL | +1 (312) 961-XXXX |
| Global Crossing Local Services-il | Cook | Chicago, IL | +1 (312) 962-XXXX |
| Usa Mobility Wireless | Cook | Chicago, IL | +1 (312) 963-XXXX |
| Cook | +1 (312) 964-XXXX | ||
| Cellco Partnership DBA Verizon Wireless | Cook | Chicago, IL | +1 (312) 965-XXXX |
| Cellco Partnership DBA Verizon Wireless | Cook | La Grange Park, IL | +1 (312) 968-XXXX |
| Cellco Partnership DBA Verizon Wireless | Cook | La Grange Park, IL | +1 (312) 969-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 970-XXXX |
| Cook | +1 (312) 971-XXXX | ||
| New Cingular Wireless PCS | Cook | Chicago, IL | +1 (312) 972-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 974-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 977-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 979-XXXX |
| Teleport Communications Group - Chicago | Cook | Chicago, IL | +1 (312) 980-XXXX |
| Ovation Communications Of Illinois | Cook | Chicago, IL | +1 (312) 981-XXXX |
| Usa Mobility Wireless | Cook | Chicago, IL | +1 (312) 982-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 983-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 984-XXXX |
| Ovation Communications Of Illinois | Cook | Chicago, IL | +1 (312) 985-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 986-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 987-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 988-XXXX |
| New Cingular Wireless PCS | Du Page | Hinsdale, IL | +1 (312) 990-XXXX |
| New Cingular Wireless PCS | Cook | Wheeling, IL | +1 (312) 991-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 992-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 993-XXXX |
| Ovation Communications Of Illinois | Cook | Chicago, IL | +1 (312) 994-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 996-XXXX |
| Ameritech Illinois | Cook | Chicago, IL | +1 (312) 997-XXXX |
| Cook | +1 (312) 998-XXXX | ||
| Cygnus Telecommunications Corporation | Chicago, IL | +1 (312) 999-XXXX |
