DELTA — CO
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ONVOY, LLC - CO | 026D | 2 |
| UNION TELEPHONE COMPANY | 013B | 1 |
| BANDWIDTH.COM CLEC, LLC - CO | 078F | 1 |
| FASTTRACK COMMUNICATIONS, INC. - CO | 330B | 1 |
| QWEST CORPORATION | 9636 | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| ONVOY, LLC - CO | 026D | 2 |
| UNION TELEPHONE COMPANY | 013B | 1 |
| BANDWIDTH.COM CLEC, LLC - CO | 078F | 1 |
| FASTTRACK COMMUNICATIONS, INC. - CO | 330B | 1 |
| QWEST CORPORATION | 9636 | 1 |