Phone numbers in Okld Berkeley, California
Okld Berkeley has 82 phone prefixes in area codes 341, 510.
Biggest holders: AT&T (local phone), T-Mobile (including Sprint), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 18%
- Local phone company 43%
- Internet / business phone carrier 32%
- Phone company 7%
Every prefix in Okld Berkeley
Search the first six digits of a number in this list. If it's here, the number started in Okld Berkeley with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 341-212 | Telnyx | Internet / business phone carrier | 2021 |
| 341-219 | Tpx Communications | Internet / business phone carrier | 2022 |
| 341-237 | Onvoy | Internet / business phone carrier | 2023 |
| 341-253 | Onvoy | Internet / business phone carrier | 2024 |
| 341-254 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 341-255 | Shelcomm | Phone company | 2024 |
| 341-266 | Onvoy | Internet / business phone carrier | 2026 |
| 341-333 | Fractel | Internet / business phone carrier | 2019 |
| 341-512 | Sonic Telecom | Phone company | 2022 |
| 341-688 | TON80 Communications | Internet / business phone carrier | 2022 |
| 341-766 | Fractel | Internet / business phone carrier | 2020 |
| 341-946 | Fractel | Internet / business phone carrier | 2021 |
| 510-204 | AT&T (local phone) | Local phone company | – |
| 510-225 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 510-229 | AT&T (local phone) | Local phone company | – |
| 510-277 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-280 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 510-292 | AT&T (local phone) | Local phone company | – |
| 510-295 | Verizon Wireless | Mobile carrier | – |
| 510-345 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 510-356 | AT&T (local phone) | Local phone company | 2007 |
| 510-365 | T-Mobile (including Sprint) | Mobile carrier | 2013 |
| 510-416 | North County Communication | Phone company | – |
| 510-423 | Windstream (PAETEC) | Internet / business phone carrier | 2008 |
| 510-486 | AT&T (local phone) | Local phone company | – |
| 510-495 | AT&T (local phone) | Local phone company | – |
| 510-524 | AT&T (local phone) | Local phone company | – |
| 510-525 | AT&T (local phone) | Local phone company | – |
| 510-526 | AT&T (local phone) | Local phone company | – |
| 510-527 | AT&T (local phone) | Local phone company | – |
| 510-528 | AT&T (local phone) | Local phone company | – |
| 510-529 | AT&T (local phone) | Local phone company | – |
| 510-540 | AT&T (local phone) | Local phone company | – |
| 510-542 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 510-548 | AT&T (local phone) | Local phone company | – |
| 510-549 | AT&T (local phone) | Local phone company | – |
| 510-558 | AT&T (local phone) | Local phone company | – |
| 510-559 | AT&T (local phone) | Local phone company | – |
| 510-570 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 510-616 | Sonic Telecom | Phone company | 2017 |
| 510-631 | AT&T Mobility | Mobile carrier | 2015 |
| 510-642 | AT&T (local phone) | Local phone company | – |
| 510-643 | AT&T (local phone) | Local phone company | – |
| 510-644 | AT&T (local phone) | Local phone company | – |
| 510-646 | Bandwidth | Internet / business phone carrier | 2013 |
| 510-647 | AT&T (local phone) | Local phone company | – |
| 510-649 | AT&T (local phone) | Local phone company | – |
| 510-664 | AT&T (local phone) | Local phone company | – |
| 510-665 | AT&T (local phone) | Local phone company | – |
| 510-666 | AT&T (local phone) | Local phone company | – |
| 510-679 | Verizon Wireless | Mobile carrier | 2015 |
| 510-684 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 510-704 | AT&T (local phone) | Local phone company | – |
| 510-705 | AT&T (local phone) | Local phone company | – |
| 510-717 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 510-725 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-809 | Tpx Communications | Internet / business phone carrier | – |
| 510-812 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 510-833 | Comcast | Internet / business phone carrier | 2014 |
| 510-841 | AT&T (local phone) | Local phone company | – |
| 510-843 | AT&T (local phone) | Local phone company | – |
| 510-845 | AT&T (local phone) | Local phone company | – |
| 510-847 | Verizon Wireless | Mobile carrier | 2001 |
| 510-848 | AT&T (local phone) | Local phone company | – |
| 510-849 | AT&T (local phone) | Local phone company | – |
| 510-859 | Tpx Communications | Internet / business phone carrier | – |
| 510-868 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-883 | AT&T (local phone) | Local phone company | – |
| 510-898 | Teleport Communications America | Internet / business phone carrier | – |
| 510-900 | Onvoy | Internet / business phone carrier | – |
| 510-926 | Verizon Wireless | Mobile carrier | – |
| 510-944 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 510-960 | AT&T (local phone) | Local phone company | – |
| 510-973 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 510-976 | North County Communication | Phone company | 2011 |
| 510-977 | Fractel | Internet / business phone carrier | 2019 |
| 510-981 | AT&T (local phone) | Local phone company | – |
| 510-982 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 510-984 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 510-989 | Integrated Path Communications | Phone company | – |
| 510-990 | Onvoy | Internet / business phone carrier | – |
| 510-993 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
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.