Connecticut Area Codes
Data last updated: June 25, 2026
Area Codes in Connecticut
| NPA | Major Cities | Status | Exchanges | Overlay |
|---|---|---|---|---|
| 203 | Hartford, Stamford, Bloomfield | Active | 784 | Yes |
| 475 | Hartford, Bloomfield, Middletown | Active | 786 | Yes |
| 860 | Hartford, Bloomfield, Middletown | Active | 783 | Yes |
| 959 | Hartford, Bloomfield, New Haven | Active | 786 | Yes |
Top Carriers in Connecticut
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | 9147 | 668 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | 182 |
| OMNIPOINT COMMUNICATIONS, INC. - CT | 6624 | 127 |
| ONVOY, LLC - CT | 639C | 123 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 117 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CT | 7143 | 98 |
| PAETEC ITEL, LLC | 829J | 94 |
| LEVEL 3 COMMUNICATIONS, LLC - CT | 4800 | 73 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 67 |
| METROPCS, INC. | 5562 | 60 |