| 06409 Centerbrook | 860/959 | Middlesex County | Connecticut (CT) |
| 06412 Chester | 860/959 | Middlesex County | Connecticut (CT) |
| 06413 Clinton | 860/959 | Middlesex County | Connecticut (CT) |
| 06414 Cobalt | 860/959 | Middlesex County | Connecticut (CT) |
| 06416 Cromwell | 860/959 | Middlesex County | Connecticut (CT) |
| 06417 Deep River | 860/959 | Middlesex County | Connecticut (CT) |
| 06419 Killingworth | 860/959 | Middlesex County | Connecticut (CT) |
| 06419 Deep River | 860/959 | Middlesex County | Connecticut (CT) |
| 06422 Durham | 860/959 | Middlesex County | Connecticut (CT) |
| 06423 East Haddam | 860/959 | Middlesex County | Connecticut (CT) |
| 06424 Haddam Neck | 860/959 | Middlesex County | Connecticut (CT) |
| 06424 East Hampton | 860/959 | Middlesex County | Connecticut (CT) |
| 06426 Essex | 860/959 | Middlesex County | Connecticut (CT) |
| 06438 Haddam | 860/959 | Middlesex County | Connecticut (CT) |
| 06441 Higganum | 860/959 | Middlesex County | Connecticut (CT) |
| 06442 Ivoryton | 860/959 | Middlesex County | Connecticut (CT) |
| 06455 Middlefield | 860/959 | Middlesex County | Connecticut (CT) |
| 06456 Middle Haddam | 860/959 | Middlesex County | Connecticut (CT) |
| 06457 Middletown | 860/959 | Middlesex County | Connecticut (CT) |
| 06459 Middletown | 860/959 | Middlesex County | Connecticut (CT) |
| 06459 Wesleyan | 860/959 | Middlesex County | Connecticut (CT) |
| 06469 Moodus | 860/959 | Middlesex County | Connecticut (CT) |
| 06475 Fenwick | 860/959 | Middlesex County | Connecticut (CT) |
| 06475 Old Saybrook | 860/959 | Middlesex County | Connecticut (CT) |
| 06480 Portland | 860/959 | Middlesex County | Connecticut (CT) |
| 06481 Rockfall | 860/959 | Middlesex County | Connecticut (CT) |
| 06498 Westbrook | 860/959 | Middlesex County | Connecticut (CT) |