Area code 203 — Connecticut
Area code 203 is in Connecticut and serves Bridgeport, Danbury, New Haven, Waterbury. Time zone, overlays, counties and ZIP codes.
| Location | South-west Connecticut (Bridgeport, Danbury, New Haven, Waterbury) |
|---|---|
| Main places | Bridgeport, Danbury, New Haven, Waterbury |
| State | Connecticut |
| Status | In service · since 1947 |
| Time zone | Eastern · |
| Overlay codes | 475 Overlays share the same area. Local calls usually need 10-digit dialing. |
| Local dialing | 10 digits |
History
- Created for all of Connecticut
- 1995: split to create 860
- 2009: overlaid by 475
Counties (approximate)
Connecticut MetropolitanFairfieldFairfield CountyHartford CountyLitchfield CountyMiddlesex CountyNaugatuck ValleyNew Haven CountySouth Central RegionalWestern Connecticut
ZIP codes in area code 203
Approximate: area code boundaries follow telephone rate centers, not ZIP codes.
06401 Ansonia06403 Beacon Falls06404 Botsford06405 Branford06408 Cheshire06410 Cheshire06411 Cheshire06413 Clinton06417 Deep River06418 Derby06419 Killingworth06422 Durham06437 Guilford06440 Hawleyville06441 Higganum06443 Madison06444 Marion06451 Meriden06460 Milford06461 Milford06467 Milldale06468 Monroe06470 Newtown06471 North Branford06472 Northford06473 North Haven06477 Orange06478 Oxford06479 Plantsville06482 Sandy Hook06483 Seymour06484 Shelton06487 South Britain06488 Southbury06491 Stevenson06492 Wallingford06493 Wallingford06494 Wallingford06495 Wallingford06498 Westbrook
Format a 203 number
US numbers are written as (203) 555-0123 or 203-555-0123. From outside the US, dial +1 203 555 0123.
Is a call from 203 a scam?
An area code only tells you where a number was assigned. Caller ID can be faked (“spoofed”), so do not trust a call just because the area code looks local. Never share codes or payment details with unexpected callers.
Sources: NANPA via NumberResearch.org (CC BY 4.0); place names and history from Wikipedia (CC BY-SA 4.0). See data sources.