Phone numbers in Alamosa, Colorado
Alamosa has 13 phone prefixes in area code 719.
Biggest holders: Verizon Wireless, Level 3 (Lumen), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 54%
- Local phone company 15%
- Internet / business phone carrier 23%
- Phone company 8%
Every prefix in Alamosa
Search the first six digits of a number in this list. If it's here, the number started in Alamosa with the carrier shown. If it isn't, check the Colorado page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 719-206 | Blanca Tel | Phone company | – |
| 719-298 | AT&T Mobility | Mobile carrier | 2006 |
| 719-341 | MetroPCS (T-Mobile) | Mobile carrier | 2017 |
| 719-480 | Verizon Wireless | Mobile carrier | – |
| 719-496 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 719-580 | AT&T Mobility | Mobile carrier | – |
| 719-587 | CenturyLink / Lumen | Local phone company | – |
| 719-588 | Verizon Wireless | Mobile carrier | – |
| 719-589 | CenturyLink / Lumen | Local phone company | – |
| 719-670 | Verizon Wireless | Mobile carrier | 2022 |
| 719-936 | N.e. Colorado Cellular | Mobile carrier | 2020 |
| 719-937 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 719-992 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
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.