Phone numbers in Okld Almd, California
Okld Almd has 49 phone prefixes in area codes 341, 510.
Biggest holders: AT&T (local phone), Onvoy, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 22%
- Local phone company 24%
- Internet / business phone carrier 53%
Every prefix in Okld Almd
Search the first six digits of a number in this list. If it's here, the number started in Okld Almd with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 341-210 | Bandwidth | Internet / business phone carrier | 2021 |
| 341-217 | Bandwidth | Internet / business phone carrier | 2022 |
| 341-223 | Commio | Internet / business phone carrier | 2022 |
| 341-234 | Fractel | Internet / business phone carrier | 2021 |
| 341-239 | Onvoy | Internet / business phone carrier | 2023 |
| 341-270 | AT&T Mobility | Mobile carrier | 2026 |
| 341-895 | Onvoy | Internet / business phone carrier | – |
| 510-205 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 510-214 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 510-217 | Teleport Communications America | Internet / business phone carrier | – |
| 510-227 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-239 | Tpx Communications | Internet / business phone carrier | – |
| 510-254 | Level 3 (Lumen) | Internet / business phone carrier | 2011 |
| 510-263 | AT&T (local phone) | Local phone company | – |
| 510-306 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 510-337 | AT&T (local phone) | Local phone company | – |
| 510-355 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-373 | Onvoy | Internet / business phone carrier | – |
| 510-473 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 510-519 | Verizon Wireless | Mobile carrier | 2017 |
| 510-521 | AT&T (local phone) | Local phone company | – |
| 510-522 | AT&T (local phone) | Local phone company | – |
| 510-523 | AT&T (local phone) | Local phone company | – |
| 510-545 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 510-629 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-671 | Bandwidth | Internet / business phone carrier | 2013 |
| 510-682 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 510-694 | Onvoy | Internet / business phone carrier | 2014 |
| 510-747 | AT&T (local phone) | Local phone company | – |
| 510-748 | AT&T (local phone) | Local phone company | – |
| 510-749 | AT&T (local phone) | Local phone company | – |
| 510-764 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-769 | AT&T (local phone) | Local phone company | – |
| 510-775 | Bandwidth | Internet / business phone carrier | 2012 |
| 510-800 | Onvoy | Internet / business phone carrier | – |
| 510-810 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 510-814 | AT&T (local phone) | Local phone company | – |
| 510-846 | Verizon Wireless | Mobile carrier | – |
| 510-863 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 510-864 | AT&T (local phone) | Local phone company | – |
| 510-865 | AT&T (local phone) | Local phone company | – |
| 510-871 | Verizon Wireless | Mobile carrier | 2014 |
| 510-872 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 510-905 | MetroPCS (T-Mobile) | Mobile carrier | 2018 |
| 510-906 | Onvoy | Internet / business phone carrier | 2016 |
| 510-956 | Bandwidth | Internet / business phone carrier | 2019 |
| 510-975 | Verizon Wireless | Mobile carrier | 2019 |
| 510-978 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-995 | Tpx Communications | Internet / business phone 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.