Phone numbers in San Pedro, California
San Pedro has 67 phone prefixes in area codes 310, 424.
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 36%
- Local phone company 33%
- Internet / business phone carrier 30%
- Phone company 1%
Every prefix in San Pedro
Search the first six digits of a number in this list. If it's here, the number started in San Pedro with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 310-221 | AT&T (local phone) | Local phone company | – |
| 310-233 | AT&T (local phone) | Local phone company | – |
| 310-241 | AT&T (local phone) | Local phone company | – |
| 310-427 | Verizon Wireless | Mobile carrier | – |
| 310-507 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 310-513 | AT&T (local phone) | Local phone company | – |
| 310-514 | AT&T (local phone) | Local phone company | – |
| 310-518 | AT&T (local phone) | Local phone company | – |
| 310-519 | AT&T (local phone) | Local phone company | – |
| 310-521 | AT&T (local phone) | Local phone company | – |
| 310-522 | AT&T (local phone) | Local phone company | – |
| 310-547 | AT&T (local phone) | Local phone company | – |
| 310-548 | AT&T (local phone) | Local phone company | – |
| 310-549 | AT&T (local phone) | Local phone company | – |
| 310-684 | T-Mobile (including Sprint) | Mobile carrier | – |
| 310-707 | Tpx Communications | Internet / business phone carrier | – |
| 310-731 | Onvoy | Internet / business phone carrier | 2025 |
| 310-732 | AT&T (local phone) | Local phone company | – |
| 310-758 | Onvoy | Internet / business phone carrier | 2023 |
| 310-809 | T-Mobile (including Sprint) | Mobile carrier | – |
| 310-816 | AT&T (local phone) | Local phone company | – |
| 310-830 | AT&T (local phone) | Local phone company | – |
| 310-831 | AT&T (local phone) | Local phone company | – |
| 310-832 | AT&T (local phone) | Local phone company | – |
| 310-833 | AT&T (local phone) | Local phone company | – |
| 310-834 | AT&T (local phone) | Local phone company | – |
| 310-835 | AT&T (local phone) | Local phone company | – |
| 310-847 | AT&T (local phone) | Local phone company | – |
| 310-872 | T-Mobile (including Sprint) | Mobile carrier | – |
| 310-935 | Onvoy | Internet / business phone carrier | 2011 |
| 310-952 | AT&T (local phone) | Local phone company | – |
| 310-971 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 310-982 | T-Mobile (including Sprint) | Mobile carrier | 2005 |
| 310-984 | Level 3 (Lumen) | Internet / business phone carrier | 2004 |
| 310-987 | T-Mobile (including Sprint) | Mobile carrier | 2005 |
| 424-210 | T-Mobile (including Sprint) | Mobile carrier | 2006 |
| 424-215 | T-Mobile (including Sprint) | Mobile carrier | 2007 |
| 424-224 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 424-264 | AT&T Enterprises | Phone company | 2006 |
| 424-267 | MCImetro (Verizon Business) | Internet / business phone carrier | 2010 |
| 424-287 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 424-308 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 424-339 | Onvoy | Internet / business phone carrier | 2015 |
| 424-342 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 424-364 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 424-368 | Onvoy | Internet / business phone carrier | – |
| 424-417 | Tpx Communications | Internet / business phone carrier | 2018 |
| 424-450 | AT&T Mobility | Mobile carrier | 2019 |
| 424-451 | Verizon Wireless | Mobile carrier | 2021 |
| 424-462 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 424-473 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 424-477 | Charter / Spectrum | Internet / business phone carrier | 2006 |
| 424-482 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 424-489 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 424-494 | AT&T Mobility | Mobile carrier | 2023 |
| 424-505 | AT&T Mobility | Mobile carrier | 2024 |
| 424-517 | Bandwidth | Internet / business phone carrier | 2024 |
| 424-533 | AT&T Mobility | Mobile carrier | 2015 |
| 424-534 | AT&T Mobility | Mobile carrier | 2024 |
| 424-536 | Verizon Wireless | Mobile carrier | 2015 |
| 424-540 | Teleport Communications America | Internet / business phone carrier | 2025 |
| 424-552 | Onvoy | Internet / business phone carrier | – |
| 424-570 | Level 3 (Lumen) | Internet / business phone carrier | 2009 |
| 424-580 | Onvoy | Internet / business phone carrier | 2026 |
| 424-703 | MetroPCS (T-Mobile) | Mobile carrier | 2010 |
| 424-772 | Comcast | Internet / business phone carrier | – |
| 424-788 | Fractel | Internet / business phone carrier | 2020 |
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.