64
- 06401 Ansonia
- 06403 Beacon Falls
- 06405 Branford
- 06409 Centerbrook
- 06410 Cheshire
- 06412 Chester
- 06413 Clinton
- 06414 Cobalt
- 06415 Colchester
- 06416 Cromwell
- 06417 Deep River
- 06418 Derby
- 06419 Killingworth
- 06420 Salem
- 06422 Durham
- 06423 East Haddam
- 06424 East Hampton
- 06426 Essex
- 06437 Guilford
- 06438 Haddam
- 06441 Higganum
- 06442 Ivoryton
- 06443 Madison
- 06444 Marion
- 06447 Marlborough
- 06450 Meriden
- 06451 Meriden
- 06455 Middlefield
- 06456 Middle Haddam
- 06457 Middletown
- 06460 Milford
- 06461 Milford
- 06467 Milldale
- 06468 Monroe
- 06469 Moodus
- 06470 Newtown
- 06471 North Branford
- 06472 Northford
- 06473 North Haven
- 06475 Old Saybrook
- 06477 Orange
- 06478 Oxford
- 06479 Plantsville
- 06480 Portland
- 06481 Rockfall
- 06482 Sandy Hook
- 06483 Seymour
- 06484 Shelton
- 06488 Southbury
- 06489 Southington
- 06492 Wallingford
- 06498 Westbrook