Coverage Map
Interactive
Showing coverage area for Area Code 331 in Illinois.
Top Cities
| City Name | Type |
|---|---|
| Chicago | Principal |
| Stonepark | Principal |
| Ridgeport | Principal |
| Valleyville | Principal |
| Old Fallsville | Principal |
| Havenside | Principal |
| Hillcity | Principal |
| Hillburg | Principal |
| Stoneton | Principal |
| West Valleymouth | Principal |
| Fieldside | Principal |
| North Ridgewood | Principal |
| Havenmouth | Principal |
| Mount Riverview | Principal |
| North Ridgeside | Principal |
| Lake Hillburg | Principal |
| Mount Creekview | Principal |
| North Ridgefield | Principal |
| North Viewfield | Principal |
| Waterfield | Principal |
| Hillfield | Principal |
| Brookside | Principal |
| Brookville | Principal |
| East Ridgewood | Principal |
| Havenport | Principal |
| Fieldside | Principal |
| Riverburg | Principal |
| New Fieldcity | Principal |
| Brookville | Principal |
| West Woodton | Principal |
Counties Served
| County | State |
|---|---|
| DuPage County | Illinois |
| Kane County | Illinois |
| Will County | Illinois |
| Kendall County | Illinois |
Active Phone Prefixes
Recently Assigned
| Prefix | Usage | Location | Carrier |
|---|---|---|---|
| 331-371 | Mobile | Greater Metro Area | T-Mobile |
| 331-922 | Mobile | Greater Metro Area | AT&T |
| 331-662 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-361 | Mobile | Greater Metro Area | Sprint |
| 331-441 | Mobile | Greater Metro Area | AT&T |
| 331-576 | Mobile | Greater Metro Area | Sprint |
| 331-205 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-374 | Mobile | Greater Metro Area | AT&T |
| 331-400 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-626 | Landline | Greater Metro Area | AT&T |
| 331-709 | Landline | Greater Metro Area | Verizon Wireless |
| 331-749 | Mobile | Greater Metro Area | Sprint |
| 331-908 | Mobile | Greater Metro Area | Sprint |
| 331-993 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-406 | Mobile | Greater Metro Area | T-Mobile |
| 331-696 | Landline | Greater Metro Area | Sprint |
| 331-261 | Landline | Greater Metro Area | Verizon Wireless |
| 331-357 | Mobile | Greater Metro Area | T-Mobile |
| 331-328 | Landline | Greater Metro Area | AT&T |
| 331-939 | Landline | Greater Metro Area | Sprint |
| 331-599 | Landline | Greater Metro Area | T-Mobile |
| 331-240 | Landline | Greater Metro Area | T-Mobile |
| 331-311 | Mobile | Greater Metro Area | Sprint |
| 331-754 | Landline | Greater Metro Area | Verizon Wireless |
| 331-963 | Mobile | Greater Metro Area | T-Mobile |
| 331-509 | Landline | Greater Metro Area | Verizon Wireless |
| 331-680 | Landline | Greater Metro Area | Verizon Wireless |
| 331-600 | Landline | Greater Metro Area | AT&T |
| 331-475 | Landline | Greater Metro Area | Verizon Wireless |
| 331-603 | Landline | Greater Metro Area | T-Mobile |