Phone numbers in Cortez, Colorado
Cortez has 10 phone prefixes in area code 970.
Biggest holders: CenturyLink / Lumen, Verizon Wireless, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 40%
- Local phone company 30%
- Internet / business phone carrier 20%
- Phone company 10%
Every prefix in Cortez
Search the first six digits of a number in this list. If it's here, the number started in Cortez with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 970-299 | Onvoy | Internet / business phone carrier | 2001 |
| 970-516 | Farmers Telecommunications | Phone company | 2010 |
| 970-529 | CenturyLink / Lumen | Local phone company | – |
| 970-560 | Verizon Wireless | Mobile carrier | – |
| 970-564 | CenturyLink / Lumen | Local phone company | – |
| 970-565 | CenturyLink / Lumen | Local phone company | – |
| 970-570 | Verizon Wireless | Mobile carrier | – |
| 970-739 | AT&T Mobility | Mobile carrier | – |
| 970-816 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 970-912 | TDS Broadband Service | Internet / business phone carrier | 2024 |
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.