Phone numbers in Walden, Colorado
Walden has 5 phone prefixes in area code 970.
Biggest holders: Union Telephone, Onvoy, CenturyLink / Lumen. This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 60%
- Internet / business phone carrier 40%
Every prefix in Walden
Search the first six digits of a number in this list. If it's here, the number started in Walden with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 970-594 | Onvoy | Internet / business phone carrier | 2007 |
| 970-723 | CenturyLink / Lumen | Local phone company | – |
| 970-750 | Union Telephone | Local phone company | 2004 |
| 970-838 | MCImetro (Verizon Business) | Internet / business phone carrier | 2019 |
| 970-873 | Union Telephone | 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.