Phone numbers in Hawthorne, California
Hawthorne has 58 phone prefixes in area codes 310, 424.
Biggest holders: AT&T (local phone), Onvoy, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 24%
- Local phone company 40%
- Internet / business phone carrier 36%
Every prefix in Hawthorne
Search the first six digits of a number in this list. If it's here, the number started in Hawthorne with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 310-219 | AT&T (local phone) | Local phone company | – |
| 310-220 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 310-263 | AT&T (local phone) | Local phone company | – |
| 310-297 | AT&T (local phone) | Local phone company | – |
| 310-331 | AT&T (local phone) | Local phone company | – |
| 310-332 | AT&T (local phone) | Local phone company | – |
| 310-340 | AT&T Mobility | Mobile carrier | 2017 |
| 310-349 | AT&T (local phone) | Local phone company | – |
| 310-355 | AT&T (local phone) | Local phone company | – |
| 310-363 | AT&T (local phone) | Local phone company | – |
| 310-531 | Teleport Communications America | Internet / business phone carrier | – |
| 310-536 | AT&T (local phone) | Local phone company | – |
| 310-643 | AT&T (local phone) | Local phone company | – |
| 310-644 | AT&T (local phone) | Local phone company | – |
| 310-675 | AT&T (local phone) | Local phone company | – |
| 310-676 | AT&T (local phone) | Local phone company | – |
| 310-679 | AT&T (local phone) | Local phone company | – |
| 310-682 | Teleport Communications America | Internet / business phone carrier | 2017 |
| 310-706 | Tpx Communications | Internet / business phone carrier | – |
| 310-725 | AT&T (local phone) | Local phone company | – |
| 310-727 | AT&T (local phone) | Local phone company | – |
| 310-759 | Onvoy | Internet / business phone carrier | 2023 |
| 310-812 | AT&T (local phone) | Local phone company | – |
| 310-813 | AT&T (local phone) | Local phone company | – |
| 310-814 | AT&T (local phone) | Local phone company | – |
| 310-844 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 310-848 | Verizon Wireless | Mobile carrier | 2005 |
| 310-956 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 310-970 | AT&T (local phone) | Local phone company | – |
| 310-973 | AT&T (local phone) | Local phone company | – |
| 310-978 | AT&T (local phone) | Local phone company | – |
| 424-200 | Verizon Wireless | Mobile carrier | 2007 |
| 424-236 | AT&T Mobility | Mobile carrier | 2007 |
| 424-240 | MetroPCS (T-Mobile) | Mobile carrier | 2008 |
| 424-255 | Verizon Wireless | Mobile carrier | 2010 |
| 424-269 | Level 3 (Lumen) | Internet / business phone carrier | 2010 |
| 424-294 | Level 3 (Lumen) | Internet / business phone carrier | 2006 |
| 424-297 | CenturyLink / Lumen | Local phone company | 2013 |
| 424-307 | Bandwidth | Internet / business phone carrier | – |
| 424-310 | MetroPCS (T-Mobile) | Mobile carrier | 2017 |
| 424-336 | Onvoy | Internet / business phone carrier | – |
| 424-348 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 424-374 | AT&T Mobility | Mobile carrier | 2014 |
| 424-391 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 424-426 | MCImetro (Verizon Business) | Internet / business phone carrier | 2018 |
| 424-437 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
| 424-456 | Charter / Spectrum | Internet / business phone carrier | – |
| 424-459 | Commio | Internet / business phone carrier | 2021 |
| 424-481 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 424-491 | Bandwidth | Internet / business phone carrier | 2022 |
| 424-497 | Verizon Wireless | Mobile carrier | 2023 |
| 424-498 | Onvoy | Internet / business phone carrier | 2023 |
| 424-563 | Onvoy | Internet / business phone carrier | 2026 |
| 424-567 | Onvoy | Internet / business phone carrier | – |
| 424-588 | Fractel | Internet / business phone carrier | 2020 |
| 424-675 | AT&T Mobility | Mobile carrier | 2006 |
| 424-780 | Onvoy | Internet / business phone carrier | 2024 |
| 424-998 | AT&T Mobility | Mobile carrier | 2023 |
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.