Connecticut Area Codes
4 area codes in Connecticut, United States. Country code: +1. Find area codes by city and region.
All Connecticut Area Codes
| Area Code | Major Cities | Region |
|---|---|---|
| 203 | Bridgeport, New Haven | Southwest |
| 475 | Southwest (overlay) | Southwest |
| 860 | Hartford | North/East |
| 959 | Hartford (overlay) | North/East |
About Connecticut Area Codes
Connecticut uses 4 area codes under the North American Numbering Plan (NANP), serving Bridgeport, Hartford, New Haven. Each code follows the 3-digit format and covers a defined geographic region within the state.
Overlay Codes in Connecticut
Connecticut has adopted 2 overlay code(s): 475, 959. An overlay assigns a new area code to the same geographic region as an existing code, so both codes serve the same area. When overlay codes are active, callers must dial all 10 digits (area code + number) even for local calls within the same region.
Major Cities and Their Area Codes
Find which area code serves each major city in Connecticut.
| City / Community | Area Code(s) |
|---|---|
| Bridgeport | 203 |
| Hartford | 860 |
| New Haven | 203 |
How to Call Connecticut
Within the US: dial 1 + area code + 7-digit number (10-digit dialing applies where overlays are active).
From Canada or the Caribbean: the same NANP format applies — 1 + area code + number.
From abroad: dial your country's exit code (011 from the US, 00 from most countries, or + on mobile), then 1, then the Connecticut area code and number.
Example (from the UK): 00 1 203 XXX XXXX
Data source: North American Numbering Plan Administration (NANPA), ITU-T E.164. Area code assignments change with new overlays — verify with your carrier before dialing. NANPA