Phone numbers in Los Alamos, New Mexico
Los Alamos has 16 phone prefixes in area code 505.
Biggest holders: CenturyLink / Lumen, Verizon Wireless, Bandwidth. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 31%
- Local phone company 44%
- Internet / business phone carrier 25%
Every prefix in Los Alamos
Search the first six digits of a number in this list. If it's here, the number started in Los Alamos with the carrier shown. If it isn't, check the New Mexico page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 505-257 | Bandwidth | Internet / business phone carrier | 2012 |
| 505-309 | Bandwidth | Internet / business phone carrier | 2015 |
| 505-396 | Verizon Wireless | Mobile carrier | 2020 |
| 505-412 | Verizon Wireless | Mobile carrier | – |
| 505-487 | Verizon Wireless | Mobile carrier | 2021 |
| 505-500 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 505-551 | Peerless Network Of New Mexico | Internet / business phone carrier | – |
| 505-606 | CenturyLink / Lumen | Local phone company | 2003 |
| 505-623 | Onvoy | Internet / business phone carrier | 2024 |
| 505-661 | CenturyLink / Lumen | Local phone company | – |
| 505-662 | CenturyLink / Lumen | Local phone company | – |
| 505-663 | CenturyLink / Lumen | Local phone company | – |
| 505-664 | CenturyLink / Lumen | Local phone company | – |
| 505-665 | CenturyLink / Lumen | Local phone company | – |
| 505-667 | CenturyLink / Lumen | Local phone company | – |
| 505-695 | T-Mobile (including Sprint) | Mobile carrier | – |
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.