STAMFORD — CT
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT | 9147 | 49 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT | 6388 | 17 |
| NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | 10 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT | 7230 | 9 |
| LEVEL 3 COMMUNICATIONS, LLC - CT | 4800 | 7 |