| CITY and (COUNTY) | ZIP CODE | STATE | AREA CODE |
| Ansonia - (New Haven) | 6401 | Connecticut | 203 |
| Beacon Falls - (New Haven) | 6403 | Connecticut | 203 |
| Bethany - (New Haven) | 6524 | Connecticut | 203 |
| Bethel - (Fairfield) | 6801 | Connecticut | 203 |
| Bethlehem - (Litchfield) | 6751 | Connecticut | 203 |
| Botsford - (Fairfield) | 6404 | Connecticut | 203 |
| Branford - (New Haven) | 6405 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6601 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6602 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6604 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6605 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6606 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6607 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6608 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6610 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6650 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6673 | Connecticut | 203 |
| Bridgeport - (Fairfield) | 6699 | Connecticut | 203 |
| Brookfield - (Fairfield) | 6804 | Connecticut | 203 |
| Cheshire - (New Haven) | 6408 | Connecticut | 203 |
| Cheshire - (New Haven) | 6410 | Connecticut | 203 |
| Cheshire - (New Haven) | 6411 | Connecticut | 203 |
| Cos Cob - (Fairfield) | 6807 | Connecticut | 203 |
| Danbury - (Fairfield) | 6810 | Connecticut | 203 |
| Danbury - (Fairfield) | 6811 | Connecticut | 203 |
| Danbury - (Fairfield) | 6813 | Connecticut | 203 |
| Danbury - (Fairfield) | 6814 | Connecticut | 203 |
| Danbury - (Fairfield) | 6816 | Connecticut | 203 |
| Danbury - (Fairfield) | 6817 | Connecticut | 203 |
| Darien - (Fairfield) | 6820 | Connecticut | 203 |
| Derby - (New Haven) | 6418 | Connecticut | 203 |
| East Haven - (New Haven) | 6512 | Connecticut | 203 |
| Easton - (Fairfield) | 6612 | Connecticut | 203 |
| Fairfield - (Fairfield) | 6430 | Connecticut | 203 |
| Fairfield - (Fairfield) | 6431 | Connecticut | 203 |
| Fairfield - (Fairfield) | 6432 | Connecticut | 203 |
| Fairfield - (Fairfield) | 6824 | Connecticut | 203 |
| Fairfield - (Fairfield) | 6825 | Connecticut | 203 |
| Fairfield - (Fairfield) | 6828 | Connecticut | 203 |
| Georgetown - (Fairfield) | 6829 | Connecticut | 203 |
| Greens Farms - (Fairfield) | 6436 | Connecticut | 203 |
| Greens Farms - (Fairfield) | 6838 | Connecticut | 203 |
| Greenwich - (Fairfield) | 6830 | Connecticut | 203 |
| Greenwich - (Fairfield) | 6831 | Connecticut | 203 |
| Greenwich - (Fairfield) | 6832 | Connecticut | 203 |
| Greenwich - (Fairfield) | 6836 | Connecticut | 203 |
| Guilford - (New Haven) | 6437 | Connecticut | 203 |
| Hamden - (New Haven) | 6514 | Connecticut | 203 |
| Hamden - (New Haven) | 6517 | Connecticut | 203 |
| Hamden - (New Haven) | 6518 | Connecticut | 203 |
| Hawleyville - (Fairfield) | 6440 | Connecticut | 203 |
| Madison - (New Haven) | 6443 | Connecticut | 203 |
| Meriden - (New Haven) | 6450 | Connecticut | 203 |
| Meriden - (New Haven) | 6451 | Connecticut | 203 |
| Meriden - (New Haven) | 6454 | Connecticut | 203 |
| Middlebury - (New Haven) | 6762 | Connecticut | 203 |
| Milford - (New Haven) | 6460 | Connecticut | 203 |
| Monroe - (Fairfield) | 6468 | Connecticut | 203 |
| Naugatuck - (New Haven) | 6770 | Connecticut | 203 |
| New Canaan - (Fairfield) | 6840 | Connecticut | 203 |
| New Canaan - (Fairfield) | 6842 | Connecticut | 203 |
| New Fairfield - (Fairfield) | 6812 | Connecticut | 203 |
| New Haven - (New Haven) | 6501 | Connecticut | 203 |
| New Haven - (New Haven) | 6502 | Connecticut | 203 |
| New Haven - (New Haven) | 6503 | Connecticut | 203 |
| New Haven - (New Haven) | 6504 | Connecticut | 203 |
| New Haven - (New Haven) | 6505 | Connecticut | 203 |
| New Haven - (New Haven) | 6506 | Connecticut | 203 |
| New Haven - (New Haven) | 6507 | Connecticut | 203 |
| New Haven - (New Haven) | 6508 | Connecticut | 203 |
| New Haven - (New Haven) | 6509 | Connecticut | 203 |
| New Haven - (New Haven) | 6510 | Connecticut | 203 |
| New Haven - (New Haven) | 6511 | Connecticut | 203 |
| New Haven - (New Haven) | 6513 | Connecticut | 203 |
| New Haven - (New Haven) | 6515 | Connecticut | 203 |
| New Haven - (New Haven) | 6519 | Connecticut | 203 |
| New Haven - (New Haven) | 6520 | Connecticut | 203 |
| New Haven - (New Haven) | 6521 | Connecticut | 203 |
| New Haven - (New Haven) | 6530 | Connecticut | 203 |
| New Haven - (New Haven) | 6531 | Connecticut | 203 |
| New Haven - (New Haven) | 6532 | Connecticut | 203 |
| New Haven - (New Haven) | 6533 | Connecticut | 203 |
| New Haven - (New Haven) | 6534 | Connecticut | 203 |
| New Haven - (New Haven) | 6535 | Connecticut | 203 |
| New Haven - (New Haven) | 6536 | Connecticut | 203 |
| New Haven - (New Haven) | 6537 | Connecticut | 203 |
| New Haven - (New Haven) | 6538 | Connecticut | 203 |
| New Haven - (New Haven) | 6540 | Connecticut | 203 |
| Newtown - (Fairfield) | 6470 | Connecticut | 203 |
| North Branford - (New Haven) | 6471 | Connecticut | 203 |
| North Haven - (New Haven) | 6473 | Connecticut | 203 |
| Northford - (New Haven) | 6472 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6850 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6851 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6852 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6853 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6854 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6855 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6856 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6857 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6858 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6859 | Connecticut | 203 |
| Norwalk - (Fairfield) | 6860 | Connecticut | 203 |
| Old Greenwich - (Fairfield) | 6870 | Connecticut | 203 |
| Orange - (New Haven) | 6477 | Connecticut | 203 |
| Oxford - (New Haven) | 6478 | Connecticut | 203 |
| Prospect - (New Haven) | 6712 | Connecticut | 203 |
| Redding - (Fairfield) | 6896 | Connecticut | 203 |
| Redding Center - (Fairfield) | 6875 | Connecticut | 203 |
| Redding Ridge - (Fairfield) | 6876 | Connecticut | 203 |
| Ridgefield - (Fairfield) | 6877 | Connecticut | 203 |
| Ridgefield - (Fairfield) | 6879 | Connecticut | 203 |
| Riverside - (Fairfield) | 6878 | Connecticut | 203 |
| Roxbury - (Litchfield) | 6783 | Connecticut | 203 |
| Sandy Hook - (Fairfield) | 6482 | Connecticut | 203 |
| Seymour - (New Haven) | 6483 | Connecticut | 203 |
| Shelton - (Fairfield) | 6484 | Connecticut | 203 |
| Sherman - (Fairfield) | 6784 | Connecticut | 203 |
| South Britain - (New Haven) | 6487 | Connecticut | 203 |
| Southbury - (New Haven) | 6488 | Connecticut | 203 |
| Southport - (Fairfield) | 6490 | Connecticut | 203 |
| Southport - (Fairfield) | 6890 | Connecticut | 203 |
| Stamford - (Fairfield) | 6901 | Connecticut | 203 |
| Stamford - (Fairfield) | 6902 | Connecticut | 203 |
| Stamford - (Fairfield) | 6903 | Connecticut | 203 |
| Stamford - (Fairfield) | 6904 | Connecticut | 203 |
| Stamford - (Fairfield) | 6905 | Connecticut | 203 |
| Stamford - (Fairfield) | 6906 | Connecticut | 203 |
| Stamford - (Fairfield) | 6907 | Connecticut | 203 |
| Stamford - (Fairfield) | 6910 | Connecticut | 203 |
| Stamford - (Fairfield) | 6911 | Connecticut | 203 |
| Stamford - (Fairfield) | 6912 | Connecticut | 203 |
| Stamford - (Fairfield) | 6913 | Connecticut | 203 |
| Stamford - (Fairfield) | 6914 | Connecticut | 203 |
| Stamford - (Fairfield) | 6920 | Connecticut | 203 |
| Stamford - (Fairfield) | 6921 | Connecticut | 203 |
| Stamford - (Fairfield) | 6922 | Connecticut | 203 |
| Stamford - (Fairfield) | 6925 | Connecticut | 203 |
| Stamford - (Fairfield) | 6926 | Connecticut | 203 |
| Stamford - (Fairfield) | 6927 | Connecticut | 203 |
| Stamford - (Fairfield) | 6928 | Connecticut | 203 |
| Stevenson - (Fairfield) | 6491 | Connecticut | 203 |
| Stratford - (Fairfield) | 6497 | Connecticut | 203 |
| Stratford - (Fairfield) | 6614 | Connecticut | 203 |
| Stratford - (Fairfield) | 6615 | Connecticut | 203 |
| Trumbull - (Fairfield) | 6611 | Connecticut | 203 |
| Wallingford - (New Haven) | 6492 | Connecticut | 203 |
| Wallingford - (New Haven) | 6493 | Connecticut | 203 |
| Wallingford - (New Haven) | 6494 | Connecticut | 203 |
| Wallingford - (New Haven) | 6495 | Connecticut | 203 |
| Waterbury - (New Haven) | 6701 | Connecticut | 203 |
| Waterbury - (New Haven) | 6702 | Connecticut | 203 |
| Waterbury - (New Haven) | 6703 | Connecticut | 203 |
| Waterbury - (New Haven) | 6704 | Connecticut | 203 |
| Waterbury - (New Haven) | 6705 | Connecticut | 203 |
| Waterbury - (New Haven) | 6706 | Connecticut | 203 |
| Waterbury - (New Haven) | 6708 | Connecticut | 203 |
| Waterbury - (New Haven) | 6710 | Connecticut | 203 |
| Waterbury - (New Haven) | 6720 | Connecticut | 203 |
| Waterbury - (New Haven) | 6721 | Connecticut | 203 |
| Waterbury - (New Haven) | 6722 | Connecticut | 203 |
| Waterbury - (New Haven) | 6723 | Connecticut | 203 |
| Waterbury - (New Haven) | 6724 | Connecticut | 203 |
| Waterbury - (New Haven) | 6725 | Connecticut | 203 |
| Waterbury - (New Haven) | 6726 | Connecticut | 203 |
| Waterbury - (New Haven) | 6749 | Connecticut | 203 |
| West Haven - (New Haven) | 6516 | Connecticut | 203 |
| Weston - (Fairfield) | 6883 | Connecticut | 203 |
| Westport - (Fairfield) | 6880 | Connecticut | 203 |
| Westport - (Fairfield) | 6881 | Connecticut | 203 |
| Westport - (Fairfield) | 6888 | Connecticut | 203 |
| Westport - (Fairfield) | 6889 | Connecticut | 203 |
| Wilton - (Fairfield) | 6897 | Connecticut | 203 |
| Wolcott - (New Haven) | 6716 | Connecticut | 203 |
| Woodbridge - (New Haven) | 6525 | Connecticut | 203 |
| Woodbury - (Litchfield) | 6798 | Connecticut | 203 |
