Northeast region · Eastern Time
Connecticut Area Codes
All 4 area codes serving Connecticut, the cities each one covers, and which are overlays. Connecticut is served by 4 area codes in the Eastern Time zone.
Last updated June 5, 2026
Full list
Every Connecticut area code
Connecticut is served by 4 area codes in the Eastern Time zone. 3 of these are overlay codes layered over busy metros; the rest are geographic codes.
| Code | Main city | Type | Status |
|---|---|---|---|
| 203 | Bridgeport | Geographic | In service |
| 475 | Bridgeport | Overlay | In service |
| 860 | Hartford | Overlay | In service |
| 959 | Hartford | Overlay | In service |
Area codes and dialing in Connecticut
Connecticut's 4 area codes mix older geographic codes with newer overlays. The busiest metros — around Bridgeport, Hartford — carry the most numbers and rely on overlays, which is why 10-digit dialing is required there. Quieter parts of the state may still use a single code. The original code in the Connecticut list is 203 (Bridgeport).
Whenever a Connecticut region runs low on numbers, a new overlay is added on top rather than splitting the map, so existing customers keep their numbers. See 10-digit dialing for what that means in practice, or the newest area codes for upcoming changes.
Cities with multiple area codes
These Connecticut metros are served by an overlay of two or more codes, so 10-digit dialing applies: Bridgeport · Hartford.
Browse Connecticut another way
Explore by Northeast region, by time zone, or jump to the city index. You can also see the complete numeric list of every US area code.
Quick answers
Connecticut area code FAQ
How many area codes does Connecticut have?
Connecticut currently has 4 area codes: 203, 475, 860, 959.
What is the main area code for Connecticut?
The busiest metro in Connecticut is served by the 203 code. Major cities include Bridgeport, Hartford.
Does Connecticut require 10-digit dialing?
Yes, in its overlay metros you must dial all 10 digits. Ten-digit dialing is the national standard.