Connecticut phone numbers and area codes
Connecticut has 4 area codes and 2,020 assigned prefixes.
Look at a prefix's carrier mix below, or look up a full number on the home page.
- Mobile carrier 24%
- Local phone company 35%
- Internet / business phone carrier 38%
- Paging service 2%
- Phone company 1%
Area codes in Connecticut
| Code | Area | Prefixes here |
|---|---|---|
| 203 | South-west Connecticut (Bridgeport, Danbury, New Haven, Waterbury) | 784 |
| 475 | Connecticut (Bridgeport, Danbury, New Haven, Waterbury, and southwestern Connecticut) | 291 |
| 860 | Northern and eastern Connecticut (Hartford, Bristol, Norwich, and northern and eastern Connecticut) | 782 |
| 959 | Northern and eastern Connecticut (Hartford, Bristol, Norwich, and northern and eastern Connecticut) | 163 |
Biggest local calling areas
Numbers are assigned to rate centers. These have the most prefixes in Connecticut (the number is how many).
Hartford297New Haven188Stamford124Bridgeport119Norwalk82Danbury72Waterbury70New London47Norwich41Ansonidrby36Greenwich35New Britain34Meriden31Middletown31Willimantic25Huntington23Farmington23Southingtn23Fairfield University21Torrington21Glastonbury Center21Manchester21Darien20Westport20Trumbull20Wallingford Center20Milford20Windsor20Enfield20Bristol19Old Saybrook Center17Simsbury16Branford15Cheshire15Windsor Locks15Old Greenwich13New Canaan13Woodbury12Byram12New Milford12Putnam12Deep River Center12Rockville12Guilford11Wilton11Newtown11Naugatuck11Storrs11Harwinton10Seymour9Mystic9Watertown9Plainville9Ridgefield8Madison8Wolcott7Plainfield7Winsted7Cornwall7East Hampton7Danielson7Clinton7Redding6Georgetown6Canton6Niantic6Essex6Columbia5Thomaston5Litchfield5Canaan5Ledyard5Lyme5Stafford Springs5Pawcatuck5Coventry5Colchester5Haddam4Sharon4Jewettcity4
Carriers in Connecticut
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| AT&T (local phone) | Local phone company | 690 | 34% |
| Verizon Wireless | Mobile carrier | 182 | 9% |
| Onvoy | Internet / business phone carrier | 146 | 7% |
| T-Mobile (including Sprint) | Mobile carrier | 129 | 6% |
| AT&T Mobility | Mobile carrier | 117 | 6% |
| MCImetro (Verizon Business) | Internet / business phone carrier | 105 | 5% |
| Teleport Communications America | Internet / business phone carrier | 98 | 5% |
| Windstream (PAETEC) | Internet / business phone carrier | 94 | 5% |
| Level 3 (Lumen) | Internet / business phone carrier | 73 | 4% |
| MetroPCS (T-Mobile) | Mobile carrier | 60 | 3% |
| TON80 Communications | Internet / business phone carrier | 44 | 2% |
| Bandwidth | Internet / business phone carrier | 39 | 2% |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.