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 |
|---|---|---|---|
| 331-290 | Mobile | Greater Metro Area | T-Mobile |
| 331-618 | Landline | Greater Metro Area | T-Mobile |
| 331-233 | Mobile | Greater Metro Area | Sprint |
| 331-256 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-872 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-272 | Mobile | Greater Metro Area | AT&T |
| 331-898 | Landline | Greater Metro Area | AT&T |
| 331-816 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-547 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-858 | Landline | Greater Metro Area | Sprint |
| 331-977 | Landline | Greater Metro Area | T-Mobile |
| 331-433 | Landline | Greater Metro Area | Verizon Wireless |
| 331-634 | Landline | Greater Metro Area | Verizon Wireless |
| 331-809 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-852 | Mobile | Greater Metro Area | AT&T |
| 331-479 | Landline | Greater Metro Area | T-Mobile |
| 331-754 | Landline | Greater Metro Area | AT&T |
| 331-456 | Landline | Greater Metro Area | T-Mobile |
| 331-748 | Landline | Greater Metro Area | Verizon Wireless |
| 331-912 | Landline | Greater Metro Area | T-Mobile |
| 331-649 | Mobile | Greater Metro Area | Sprint |
| 331-224 | Landline | Greater Metro Area | AT&T |
| 331-648 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-385 | Mobile | Greater Metro Area | T-Mobile |
| 331-829 | Landline | Greater Metro Area | AT&T |
| 331-699 | Landline | Greater Metro Area | T-Mobile |
| 331-825 | Landline | Greater Metro Area | AT&T |
| 331-975 | Landline | Greater Metro Area | Verizon Wireless |
| 331-538 | Landline | Greater Metro Area | AT&T |
| 331-287 | Mobile | Greater Metro Area | AT&T |