Phone numbers in Basalt, Colorado
Basalt has 6 phone prefixes in area code 970.
Biggest holders: San Isabel Telecom, Level 3 (Lumen), Commio. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 17%
- Internet / business phone carrier 50%
- Phone company 33%
Every prefix in Basalt
Search the first six digits of a number in this list. If it's here, the number started in Basalt with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 970-273 | San Isabel Telecom | Phone company | 2006 |
| 970-279 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 970-603 | Commio | Internet / business phone carrier | 2023 |
| 970-678 | Forethought.net | Phone company | 2017 |
| 970-718 | Peerless Network Of Colorado | Internet / business phone carrier | 2013 |
| 970-927 | CenturyLink / Lumen | Local phone company | – |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.