Phone numbers in Redwood City, California
Redwood City has 65 phone prefixes in area code 650.
Biggest holders: AT&T (local phone), Verizon Wireless, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 18%
- Local phone company 45%
- Internet / business phone carrier 35%
- Phone company 2%
Every prefix in Redwood City
Search the first six digits of a number in this list. If it's here, the number started in Redwood City with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 650-207 | Verizon Wireless | Mobile carrier | – |
| 650-208 | Verizon Wireless | Mobile carrier | – |
| 650-216 | AT&T (local phone) | Local phone company | – |
| 650-241 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-249 | Onvoy | Internet / business phone carrier | – |
| 650-257 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-260 | AT&T (local phone) | Local phone company | – |
| 650-261 | AT&T (local phone) | Local phone company | – |
| 650-277 | 33 Wireless | Mobile carrier | – |
| 650-298 | AT&T (local phone) | Local phone company | – |
| 650-299 | AT&T (local phone) | Local phone company | – |
| 650-306 | AT&T (local phone) | Local phone company | – |
| 650-361 | AT&T (local phone) | Local phone company | – |
| 650-362 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-363 | AT&T (local phone) | Local phone company | – |
| 650-364 | AT&T (local phone) | Local phone company | – |
| 650-365 | AT&T (local phone) | Local phone company | – |
| 650-366 | AT&T (local phone) | Local phone company | – |
| 650-367 | AT&T (local phone) | Local phone company | – |
| 650-368 | AT&T (local phone) | Local phone company | – |
| 650-369 | AT&T (local phone) | Local phone company | – |
| 650-381 | AT&T (local phone) | Local phone company | – |
| 650-385 | Teleport Communications America | Internet / business phone carrier | – |
| 650-395 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-399 | Onvoy | Internet / business phone carrier | – |
| 650-400 | Verizon Wireless | Mobile carrier | – |
| 650-414 | Teleport Communications America | Internet / business phone carrier | 2018 |
| 650-421 | Tpx Communications | Internet / business phone carrier | – |
| 650-423 | Utility Telecom Group | Phone company | – |
| 650-454 | AT&T Mobility | Mobile carrier | 2002 |
| 650-464 | Verizon Wireless | Mobile carrier | – |
| 650-465 | Verizon Wireless | Mobile carrier | – |
| 650-474 | AT&T (local phone) | Local phone company | – |
| 650-480 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-481 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-482 | AT&T (local phone) | Local phone company | – |
| 650-503 | Tpx Communications | Internet / business phone carrier | – |
| 650-542 | AT&T (local phone) | Local phone company | – |
| 650-549 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-556 | AT&T (local phone) | Local phone company | – |
| 650-562 | AT&T (local phone) | Local phone company | – |
| 650-568 | AT&T (local phone) | Local phone company | – |
| 650-569 | AT&T (local phone) | Local phone company | – |
| 650-587 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-599 | AT&T (local phone) | Local phone company | – |
| 650-647 | Verizon Wireless | Mobile carrier | 2021 |
| 650-649 | Onvoy | Internet / business phone carrier | – |
| 650-670 | Onvoy | Internet / business phone carrier | – |
| 650-679 | Astound Broadband | Internet / business phone carrier | – |
| 650-701 | AT&T (local phone) | Local phone company | – |
| 650-716 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-722 | Verizon Wireless | Mobile carrier | – |
| 650-734 | Onvoy | Internet / business phone carrier | 2022 |
| 650-743 | AT&T Mobility | Mobile carrier | – |
| 650-771 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 650-779 | Teleport Communications America | Internet / business phone carrier | – |
| 650-780 | AT&T (local phone) | Local phone company | – |
| 650-786 | AT&T (local phone) | Local phone company | – |
| 650-817 | AT&T (local phone) | Local phone company | – |
| 650-820 | Onvoy | Internet / business phone carrier | 2023 |
| 650-839 | AT&T (local phone) | Local phone company | – |
| 650-840 | Onvoy | Internet / business phone carrier | 2026 |
| 650-868 | AT&T Mobility | Mobile carrier | – |
| 650-980 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-995 | AT&T (local phone) | Local phone company | 2001 |
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.