Phone numbers in Gypsum, Colorado
Gypsum has 5 phone prefixes in area code 970.
Biggest holders: Onvoy, CenturyLink / Lumen, MCImetro (Verizon Business). This is the local calling area (rate center) where those prefixes were first assigned.
- Local phone company 20%
- Internet / business phone carrier 60%
- Phone company 20%
Every prefix in Gypsum
Search the first six digits of a number in this list. If it's here, the number started in Gypsum with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 970-431 | Onvoy | Internet / business phone carrier | 2007 |
| 970-524 | CenturyLink / Lumen | Local phone company | – |
| 970-687 | MCImetro (Verizon Business) | Internet / business phone carrier | 2019 |
| 970-777 | San Isabel Telecom | Phone company | 2003 |
| 970-853 | Level 3 (Lumen) | Internet / business phone carrier | 2023 |
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.