Phone numbers in Redondo, California
Redondo has 82 phone prefixes in area codes 310, 424.
Biggest holders: Frontier, Onvoy, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 17%
- Local phone company 41%
- Internet / business phone carrier 41%
Every prefix in Redondo
Search the first six digits of a number in this list. If it's here, the number started in Redondo with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 310-214 | Frontier | Local phone company | – |
| 310-265 | Frontier | Local phone company | – |
| 310-303 | AT&T (local phone) | Local phone company | – |
| 310-316 | Frontier | Local phone company | – |
| 310-318 | Frontier | Local phone company | – |
| 310-370 | Frontier | Local phone company | – |
| 310-371 | Frontier | Local phone company | – |
| 310-372 | Frontier | Local phone company | – |
| 310-373 | Frontier | Local phone company | – |
| 310-374 | Frontier | Local phone company | – |
| 310-375 | Frontier | Local phone company | – |
| 310-376 | Frontier | Local phone company | – |
| 310-377 | Frontier | Local phone company | – |
| 310-378 | Frontier | Local phone company | – |
| 310-379 | Frontier | Local phone company | – |
| 310-406 | Frontier | Local phone company | – |
| 310-421 | T-Mobile (including Sprint) | Mobile carrier | – |
| 310-465 | Frontier | Local phone company | – |
| 310-504 | Peerless Network Of California | Internet / business phone carrier | 2012 |
| 310-540 | Frontier | Local phone company | – |
| 310-541 | Frontier | Local phone company | – |
| 310-542 | Frontier | Local phone company | – |
| 310-543 | Frontier | Local phone company | – |
| 310-544 | Frontier | Local phone company | – |
| 310-545 | Frontier | Local phone company | – |
| 310-546 | Frontier | Local phone company | – |
| 310-683 | Teleport Communications America | Internet / business phone carrier | – |
| 310-697 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 310-698 | Tpx Communications | Internet / business phone carrier | – |
| 310-750 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 310-791 | Frontier | Local phone company | – |
| 310-792 | Frontier | Local phone company | – |
| 310-793 | Frontier | Local phone company | – |
| 310-796 | Frontier | Local phone company | – |
| 310-798 | Frontier | Local phone company | – |
| 310-802 | Frontier | Local phone company | – |
| 310-863 | T-Mobile (including Sprint) | Mobile carrier | – |
| 310-870 | Bandwidth | Internet / business phone carrier | 2012 |
| 310-896 | Tpx Communications | Internet / business phone carrier | – |
| 310-921 | Frontier | Local phone company | – |
| 310-937 | Frontier | Local phone company | – |
| 310-939 | Frontier | Local phone company | – |
| 310-944 | Frontier | Local phone company | – |
| 310-947 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 424-206 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 424-212 | T-Mobile (including Sprint) | Mobile carrier | 2006 |
| 424-237 | MetroPCS (T-Mobile) | Mobile carrier | 2009 |
| 424-241 | Windstream (PAETEC) | Internet / business phone carrier | 2008 |
| 424-247 | Charter / Spectrum | Internet / business phone carrier | – |
| 424-254 | MCImetro (Verizon Business) | Internet / business phone carrier | 2010 |
| 424-257 | Bandwidth | Internet / business phone carrier | 2010 |
| 424-262 | Bandwidth | Internet / business phone carrier | 2010 |
| 424-265 | Bandwidth | Internet / business phone carrier | 2010 |
| 424-275 | Level 3 (Lumen) | Internet / business phone carrier | 2011 |
| 424-282 | Onvoy | Internet / business phone carrier | – |
| 424-304 | Onvoy | Internet / business phone carrier | 2015 |
| 424-327 | Comcast | Internet / business phone carrier | – |
| 424-350 | AT&T Mobility | Mobile carrier | 2015 |
| 424-352 | Bandwidth | Internet / business phone carrier | 2014 |
| 424-383 | Verizon Wireless | Mobile carrier | 2014 |
| 424-390 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 424-392 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 424-398 | Charter / Spectrum | Internet / business phone carrier | 2015 |
| 424-400 | Onvoy | Internet / business phone carrier | – |
| 424-404 | Peerless Network Of California | Internet / business phone carrier | 2017 |
| 424-408 | Verizon Wireless | Mobile carrier | – |
| 424-409 | AT&T Mobility | Mobile carrier | 2018 |
| 424-445 | AT&T Mobility | Mobile carrier | 2020 |
| 424-452 | Onvoy | Internet / business phone carrier | 2016 |
| 424-458 | Bandwidth | Internet / business phone carrier | 2021 |
| 424-471 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 424-476 | Onvoy | Internet / business phone carrier | – |
| 424-506 | Onvoy | Internet / business phone carrier | 2024 |
| 424-561 | Onvoy | Internet / business phone carrier | 2025 |
| 424-572 | Verizon Wireless | Mobile carrier | 2026 |
| 424-579 | Onvoy | Internet / business phone carrier | 2026 |
| 424-630 | Onvoy | Internet / business phone carrier | 2024 |
| 424-634 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 424-677 | Fractel | Internet / business phone carrier | 2020 |
| 424-866 | Fractel | Internet / business phone carrier | 2021 |
| 424-903 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 424-966 | 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.