HARTFORD — CT
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | 9147 | 110 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | 37 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 23 |
| METROPCS, INC. | 5562 | 17 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 16 |