| City | Area Code | Dialing Code |
|---|---|---|
| Bridgeport | 203 | +1 203 |
| Bristol | 860 | +1 860 |
| Bristol | 959 | +1 959 |
| Danbury | 203 | +1 203 |
| East Hartford | 860 | +1 860 |
| East Hartford | 959 | +1 959 |
| East Haven | 203 | +1 203 |
| Manchester | 860 | +1 860 |
| Manchester | 959 | +1 959 |
| Meriden | 203 | +1 203 |
| Middletown | 860 | +1 860 |
| Middletown | 959 | +1 959 |
| Milford | 203 | +1 203 |
| Naugatuck | 203 | +1 203 |
| New Britain | 860 | +1 860 |
| New Britain | 959 | +1 959 |
| New Haven | 203 | +1 203 |
| New London | 860 | +1 860 |
| New London | 959 | +1 959 |
| Newington | 860 | +1 860 |
| Newington | 959 | +1 959 |
| North Haven | 203 | +1 203 |
| Norwalk | 203 | +1 203 |
| Norwich | 860 | +1 860 |
| Norwich | 959 | +1 959 |
| Shelton | 203 | +1 203 |
| Stamford | 203 | +1 203 |
| Stratford | 203 | +1 203 |
| Trumbull | 203 | +1 203 |
| Waterbury | 203 | +1 203 |
| West Hartford | 860 | +1 860 |
| West Hartford | 860 | +1 860 |
| West Hartford | 959 | +1 959 |
| West Hartford | 959 | +1 959 |
| West Haven | 203 | +1 203 |
| West Torrington | 860 | +1 860 |
| West Torrington | 959 | +1 959 |
| Westport | 203 | +1 203 |
| Wethersfield | 860 | +1 860 |
| Wethersfield | 959 | +1 959 |