Phone numbers in Santa Cruz, California
Santa Cruz has 76 phone prefixes in area code 831.
Biggest holders: AT&T (local phone), Verizon Wireless, AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 30%
- Local phone company 39%
- Internet / business phone carrier 25%
- Phone company 5%
Every prefix in Santa Cruz
Search the first six digits of a number in this list. If it's here, the number started in Santa Cruz with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 831-201 | AT&T Mobility | Mobile carrier | 2016 |
| 831-212 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 831-226 | AT&T Enterprises | Phone company | 2015 |
| 831-227 | Verizon Wireless | Mobile carrier | – |
| 831-234 | Verizon Wireless | Mobile carrier | – |
| 831-239 | AT&T Mobility | Mobile carrier | – |
| 831-247 | Verizon Wireless | Mobile carrier | – |
| 831-255 | North County Communication | Phone company | – |
| 831-266 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 831-281 | Verizon Wireless | Mobile carrier | 2023 |
| 831-291 | Verizon Wireless | Mobile carrier | 2014 |
| 831-295 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 831-314 | Shelcomm | Phone company | 2024 |
| 831-316 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 831-325 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 831-331 | AT&T Mobility | Mobile carrier | – |
| 831-332 | AT&T Mobility | Mobile carrier | – |
| 831-334 | AT&T Mobility | Mobile carrier | – |
| 831-340 | Verizon Wireless | Mobile carrier | 2026 |
| 831-345 | Verizon Wireless | Mobile carrier | 2001 |
| 831-346 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 831-359 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 831-365 | Onvoy | Internet / business phone carrier | 2026 |
| 831-400 | Voip Innovations | Internet / business phone carrier | – |
| 831-419 | AT&T Mobility | Mobile carrier | – |
| 831-420 | AT&T (local phone) | Local phone company | – |
| 831-421 | AT&T (local phone) | Local phone company | – |
| 831-423 | AT&T (local phone) | Local phone company | – |
| 831-425 | AT&T (local phone) | Local phone company | – |
| 831-426 | AT&T (local phone) | Local phone company | – |
| 831-427 | AT&T (local phone) | Local phone company | – |
| 831-428 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 831-429 | AT&T (local phone) | Local phone company | – |
| 831-430 | AT&T (local phone) | Local phone company | – |
| 831-431 | AT&T (local phone) | Local phone company | – |
| 831-435 | AT&T (local phone) | Local phone company | – |
| 831-438 | AT&T (local phone) | Local phone company | – |
| 831-439 | AT&T (local phone) | Local phone company | – |
| 831-440 | AT&T (local phone) | Local phone company | – |
| 831-454 | AT&T (local phone) | Local phone company | – |
| 831-457 | AT&T (local phone) | Local phone company | – |
| 831-458 | AT&T (local phone) | Local phone company | – |
| 831-459 | AT&T (local phone) | Local phone company | – |
| 831-460 | AT&T (local phone) | Local phone company | – |
| 831-461 | AT&T (local phone) | Local phone company | – |
| 831-462 | AT&T (local phone) | Local phone company | – |
| 831-464 | AT&T (local phone) | Local phone company | – |
| 831-465 | AT&T (local phone) | Local phone company | – |
| 831-466 | AT&T (local phone) | Local phone company | – |
| 831-469 | AT&T (local phone) | Local phone company | – |
| 831-471 | AT&T (local phone) | Local phone company | – |
| 831-475 | AT&T (local phone) | Local phone company | – |
| 831-476 | AT&T (local phone) | Local phone company | – |
| 831-477 | AT&T (local phone) | Local phone company | – |
| 831-479 | AT&T (local phone) | Local phone company | – |
| 831-480 | Onvoy | Internet / business phone carrier | – |
| 831-502 | AT&T (local phone) | Local phone company | – |
| 831-515 | Tpx Communications | Internet / business phone carrier | – |
| 831-529 | Fractel | Internet / business phone carrier | 2020 |
| 831-535 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 831-566 | Verizon Wireless | Mobile carrier | 2002 |
| 831-576 | Onvoy | Internet / business phone carrier | – |
| 831-588 | Verizon Wireless | Mobile carrier | – |
| 831-600 | Tpx Communications | Internet / business phone carrier | – |
| 831-621 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 831-706 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 831-713 | Verizon Wireless | Mobile carrier | – |
| 831-777 | Onvoy | Internet / business phone carrier | 2015 |
| 831-818 | Verizon Wireless | Mobile carrier | – |
| 831-824 | Teleport Communications America | Internet / business phone carrier | – |
| 831-854 | Matrix Telecom, Llc. S/i/i Tnci | Internet / business phone carrier | – |
| 831-888 | Onvoy | Internet / business phone carrier | – |
| 831-889 | Utility Telecom Group | Phone company | 2018 |
| 831-900 | Onvoy | Internet / business phone carrier | – |
| 831-946 | Fractel | Internet / business phone carrier | 2021 |
| 831-999 | Peerless Network Of California | Internet / business phone carrier | 2016 |
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.