CARBONDALE — CO
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9636 | 2 |
| ONVOY, LLC - CO | 026D | 1 |
| BANDWIDTH.COM CLEC, LLC - CO | 078F | 1 |
| COMCAST IP PHONE, LLC | 318J | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CO | 7378 | 1 |