Phone numbers in Concord, California
Concord has 89 phone prefixes in area code 925.
Biggest holders: AT&T (local phone), MetroPCS (T-Mobile), Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Local phone company 33%
- Internet / business phone carrier 42%
- Paging service 1%
Every prefix in Concord
Search the first six digits of a number in this list. If it's here, the number started in Concord with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 925-207 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 925-222 | Onvoy | Internet / business phone carrier | – |
| 925-246 | AT&T (local phone) | Local phone company | – |
| 925-250 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 925-265 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 925-270 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 925-288 | AT&T (local phone) | Local phone company | – |
| 925-305 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 925-326 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 925-332 | Peerless Network Of California | Internet / business phone carrier | 2012 |
| 925-334 | Verizon Wireless | Mobile carrier | 2011 |
| 925-338 | Bandwidth | Internet / business phone carrier | 2011 |
| 925-346 | American Messaging Services | Paging service | – |
| 925-348 | AT&T Mobility | Mobile carrier | 2002 |
| 925-349 | Teleport Communications America | Internet / business phone carrier | – |
| 925-356 | AT&T (local phone) | Local phone company | – |
| 925-363 | AT&T (local phone) | Local phone company | – |
| 925-375 | Verizon Wireless | Mobile carrier | 2016 |
| 925-381 | AT&T Mobility | Mobile carrier | – |
| 925-383 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 925-391 | Level 3 (Lumen) | Internet / business phone carrier | 2013 |
| 925-405 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 925-408 | AT&T Mobility | Mobile carrier | – |
| 925-412 | Verizon Wireless | Mobile carrier | 2018 |
| 925-414 | Verizon Wireless | Mobile carrier | 2019 |
| 925-419 | Onvoy | Internet / business phone carrier | 2023 |
| 925-421 | Bandwidth | Internet / business phone carrier | 2012 |
| 925-429 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 925-435 | T-Mobile (including Sprint) | Mobile carrier | – |
| 925-446 | MetroPCS (T-Mobile) | Mobile carrier | 2012 |
| 925-459 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 925-466 | Fractel | Internet / business phone carrier | 2020 |
| 925-471 | Onvoy | Internet / business phone carrier | – |
| 925-483 | Comcast | Internet / business phone carrier | 2015 |
| 925-490 | Bandwidth | Internet / business phone carrier | 2014 |
| 925-494 | Bandwidth | Internet / business phone carrier | 2015 |
| 925-496 | Bandwidth | Internet / business phone carrier | 2021 |
| 925-497 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 925-499 | MCImetro (Verizon Business) | Internet / business phone carrier | 2017 |
| 925-507 | Verizon Wireless | Mobile carrier | 2023 |
| 925-510 | MetroPCS (T-Mobile) | Mobile carrier | 2018 |
| 925-515 | Onvoy | Internet / business phone carrier | 2020 |
| 925-521 | AT&T (local phone) | Local phone company | – |
| 925-536 | Telnyx | Internet / business phone carrier | 2017 |
| 925-566 | Teleport Communications America | Internet / business phone carrier | – |
| 925-586 | Verizon Wireless | Mobile carrier | – |
| 925-595 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 925-602 | AT&T (local phone) | Local phone company | – |
| 925-603 | AT&T (local phone) | Local phone company | – |
| 925-609 | AT&T (local phone) | Local phone company | – |
| 925-633 | Fractel | Internet / business phone carrier | 2021 |
| 925-644 | Fractel | Internet / business phone carrier | 2021 |
| 925-646 | AT&T (local phone) | Local phone company | – |
| 925-653 | Onvoy | Internet / business phone carrier | 2026 |
| 925-655 | Fractel | Internet / business phone carrier | 2019 |
| 925-671 | AT&T (local phone) | Local phone company | – |
| 925-674 | AT&T (local phone) | Local phone company | – |
| 925-675 | AT&T (local phone) | Local phone company | – |
| 925-676 | AT&T (local phone) | Local phone company | – |
| 925-677 | AT&T (local phone) | Local phone company | – |
| 925-680 | AT&T (local phone) | Local phone company | – |
| 925-681 | AT&T (local phone) | Local phone company | – |
| 925-682 | AT&T (local phone) | Local phone company | – |
| 925-685 | AT&T (local phone) | Local phone company | – |
| 925-686 | AT&T (local phone) | Local phone company | – |
| 925-687 | AT&T (local phone) | Local phone company | – |
| 925-688 | AT&T (local phone) | Local phone company | – |
| 925-689 | AT&T (local phone) | Local phone company | – |
| 925-691 | AT&T (local phone) | Local phone company | – |
| 925-692 | AT&T (local phone) | Local phone company | – |
| 925-695 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 925-726 | Tpx Communications | Internet / business phone carrier | – |
| 925-768 | Verizon Wireless | Mobile carrier | 2001 |
| 925-771 | Tpx Communications | Internet / business phone carrier | 2001 |
| 925-787 | Verizon Wireless | Mobile carrier | – |
| 925-798 | AT&T (local phone) | Local phone company | – |
| 925-808 | AT&T (local phone) | Local phone company | – |
| 925-822 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 925-825 | AT&T (local phone) | Local phone company | – |
| 925-826 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 925-827 | AT&T (local phone) | Local phone company | – |
| 925-849 | Tpx Communications | Internet / business phone carrier | – |
| 925-852 | MCImetro (Verizon Business) | Internet / business phone carrier | 2001 |
| 925-864 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 925-887 | Matrix Telecom, Llc. S/i/i Tnci | Internet / business phone carrier | – |
| 925-890 | AT&T Mobility | Mobile carrier | – |
| 925-925 | Onvoy | Internet / business phone carrier | 2022 |
| 925-969 | AT&T (local phone) | Local phone company | – |
| 925-995 | Onvoy | 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.