Phone numbers in Livermore, California
Livermore has 50 phone prefixes in area code 925.
Biggest holders: AT&T (local phone), Tpx Communications, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 34%
- Internet / business phone carrier 40%
- Paging service 2%
- Phone company 4%
Every prefix in Livermore
Search the first six digits of a number in this list. If it's here, the number started in Livermore with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 925-215 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 925-243 | AT&T (local phone) | Local phone company | – |
| 925-245 | AT&T (local phone) | Local phone company | – |
| 925-273 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 925-290 | XO California | Phone company | – |
| 925-292 | Comcast | Internet / business phone carrier | – |
| 925-294 | AT&T (local phone) | Local phone company | – |
| 925-315 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 925-321 | AT&T Mobility | Mobile carrier | 2001 |
| 925-337 | Verizon Wireless | Mobile carrier | 2002 |
| 925-339 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 925-341 | AT&T Mobility | Mobile carrier | 2020 |
| 925-344 | Tpx Communications | Internet / business phone carrier | – |
| 925-347 | American Messaging Services | Paging service | – |
| 925-371 | AT&T (local phone) | Local phone company | – |
| 925-373 | AT&T (local phone) | Local phone company | – |
| 925-409 | Verizon Wireless | Mobile carrier | 2017 |
| 925-422 | AT&T (local phone) | Local phone company | – |
| 925-423 | AT&T (local phone) | Local phone company | – |
| 925-424 | AT&T (local phone) | Local phone company | – |
| 925-443 | AT&T (local phone) | Local phone company | – |
| 925-447 | AT&T (local phone) | Local phone company | – |
| 925-449 | AT&T (local phone) | Local phone company | – |
| 925-453 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 925-454 | AT&T (local phone) | Local phone company | – |
| 925-455 | AT&T (local phone) | Local phone company | – |
| 925-456 | AT&T (local phone) | Local phone company | – |
| 925-493 | Teleport Communications America | Internet / business phone carrier | – |
| 925-495 | Bandwidth | Internet / business phone carrier | 2016 |
| 925-505 | Boost / Virgin Mobile | Mobile carrier | 2022 |
| 925-518 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 925-525 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 925-533 | Fractel | Internet / business phone carrier | 2020 |
| 925-534 | Level 3 (Lumen) | Internet / business phone carrier | 2019 |
| 925-537 | TON80 Communications | Internet / business phone carrier | 2022 |
| 925-541 | Shelcomm | Phone company | 2024 |
| 925-579 | MCImetro (Verizon Business) | Internet / business phone carrier | 2001 |
| 925-583 | Tpx Communications | Internet / business phone carrier | – |
| 925-591 | Onvoy | Internet / business phone carrier | 2026 |
| 925-599 | Fractel | Internet / business phone carrier | 2021 |
| 925-605 | Matrix Telecom, Llc. S/i/i Tnci | Internet / business phone carrier | – |
| 925-606 | AT&T (local phone) | Local phone company | – |
| 925-667 | Tpx Communications | Internet / business phone carrier | 2001 |
| 925-724 | Tpx Communications | Internet / business phone carrier | – |
| 925-758 | Fractel | Internet / business phone carrier | 2019 |
| 925-784 | Verizon Wireless | Mobile carrier | – |
| 925-800 | Onvoy | Internet / business phone carrier | – |
| 925-960 | AT&T (local phone) | Local phone company | – |
| 925-961 | AT&T (local phone) | Local phone company | – |
| 925-980 | AT&T Mobility | 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.