OAK RIDGE — TN
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | 6 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - TN | 114F | 5 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7278 | 3 |
| PAETEC ITEL, LLC | 829J | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - TN | 4806 | 2 |