SIMSBURY — 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 | 6 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 3 |
| COMCAST IP PHONE, LLC | 318J | 2 |
| PAETEC ITEL, LLC | 829J | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - CT | 4800 | 1 |