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 |
|---|---|---|---|
| 331-205 | Landline | Greater Metro Area | Sprint |
| 331-660 | Mobile | Greater Metro Area | Sprint |
| 331-987 | Landline | Greater Metro Area | T-Mobile |
| 331-286 | Landline | Greater Metro Area | T-Mobile |
| 331-243 | Landline | Greater Metro Area | Verizon Wireless |
| 331-591 | Mobile | Greater Metro Area | AT&T |
| 331-796 | Mobile | Greater Metro Area | AT&T |
| 331-867 | Landline | Greater Metro Area | Sprint |
| 331-864 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-377 | Landline | Greater Metro Area | Verizon Wireless |
| 331-934 | Landline | Greater Metro Area | AT&T |
| 331-808 | Landline | Greater Metro Area | Sprint |
| 331-914 | Mobile | Greater Metro Area | Sprint |
| 331-515 | Mobile | Greater Metro Area | AT&T |
| 331-382 | Landline | Greater Metro Area | Sprint |
| 331-560 | Landline | Greater Metro Area | Sprint |
| 331-664 | Mobile | Greater Metro Area | AT&T |
| 331-491 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-278 | Mobile | Greater Metro Area | T-Mobile |
| 331-802 | Landline | Greater Metro Area | T-Mobile |
| 331-647 | Landline | Greater Metro Area | T-Mobile |
| 331-852 | Landline | Greater Metro Area | T-Mobile |
| 331-575 | Landline | Greater Metro Area | AT&T |
| 331-278 | Landline | Greater Metro Area | Verizon Wireless |
| 331-639 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-571 | Mobile | Greater Metro Area | AT&T |
| 331-629 | Mobile | Greater Metro Area | Verizon Wireless |
| 331-979 | Landline | Greater Metro Area | Verizon Wireless |
| 331-483 | Landline | Greater Metro Area | T-Mobile |
| 331-665 | Mobile | Greater Metro Area | Sprint |