Connecticut area codes
Connecticut has 4 area codes covering 2 areas. In 2 of them several codes overlay the same ground, so a number there can have any of them: 203 and 475 around New Haven; 860 and 959 around Hartford. The newest, 959, came into service in 2014.
- Area codes
- 4
- Areas
- 2
- Overlay areas
- 2
- Time zone
- Eastern
- Newest
- 959 (2014)
- ZIP codes
- 429 in Connecticut
Somewhere in Connecticut now? What area code am I in? answers from your location.
Every Connecticut area code
| Code | Where | Overlays | Since |
|---|---|---|---|
| 203 | Bridgeport, Stamford, New Haven | 475 | 1947 |
| 475 | Bridgeport, Stamford, New Haven | 203 | 2009 |
| 860 | Hartford, New Britain, Bristol | 959 | 1995 |
| 959 | Hartford, New Britain, Bristol | 860 | 2014 |
Connecticut area codes by area
Codes that overlay one another share one area. The places listed have a telephone rate centre of their own in NANPA's records, largest first; each links to its ZIP codes.
203, 475 — New Haven
203 (1947) was here first; 475 (2009) overlays it, so a number from anywhere in the area can have any of them.
30 places:
- Bridgeport
- Stamford
- New Haven
- Waterbury
- Norwalk
- Danbury
- Meriden
- Fairfield
- Milford
- Wallingford
- Trumbull
- Naugatuck
- Cheshire
- Branford
- Westport
- Guilford
- Darien
- Wilton
- Madison
- Seymour
- Wolcott
- Greenwich
- Woodbury
- Redding
- Ridgefield
- Old Greenwich
- New Canaan
- Byram
- Georgetown
- Newtown
3 counties:
860, 959 — Hartford
860 (1995) was here first; 959 (2014) overlays it, so a number from anywhere in the area can have any of them.
55 places, the largest 36 here (all of them on 860):
- Hartford
- New Britain
- Bristol
- Middletown
- Enfield
- Norwich
- Manchester
- Torrington
- Southington
- Glastonbury
- Windsor
- New London
- Farmington
- Willimantic
- Plainville
- Simsbury
- Storrs
- Windsor Locks
- Coventry
- Old Saybrook
- Canton
- Ledyard
- New Milford
- Plainfield
- Putnam
- Lebanon
- Rockville
- Winsted
- Killingworth
- Harwinton
- Pawcatuck
- Columbia
- Canterbury
- Colchester
- Stafford Springs
- Mystic
6 counties:
Area codes of the largest cities in Connecticut
† NANPA lists no rate centre for the town itself; these are the codes of the nearest one. A town on an area-code boundary can differ from its neighbour.
Questions about Connecticut area codes
How many area codes does Connecticut have?
4: 203, 475, 860 and 959. All of them are in overlay areas, where several codes share the same ground.
What is the newest area code in Connecticut?
959, in service since 2014. It overlays 860.
What are the area codes of the largest cities in Connecticut?
Bridgeport: 203 and 475. Stamford: 203 and 475. New Haven: 203 and 475. Hartford: 860 and 959. Waterbury: 203 and 475.
What time zone are Connecticut area codes in?
Eastern time.
Every US area code · Connecticut ZIP codes
Source: NANPA NPA database and central office code assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Connecticut area codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-codes/ct
Underlying data is public domain or openly licensed — sources, vintages and licences.