Phone numbers in Clovis, California
Clovis has 42 phone prefixes in area codes 357, 559.
Biggest holders: T-Mobile (including Sprint), AT&T (local phone), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 43%
- Local phone company 21%
- Internet / business phone carrier 33%
- Phone company 2%
Every prefix in Clovis
Search the first six digits of a number in this list. If it's here, the number started in Clovis with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 357-444 | Onvoy | Internet / business phone carrier | 2026 |
| 559-203 | T-Mobile (including Sprint) | Mobile carrier | 2010 |
| 559-207 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 559-297 | AT&T (local phone) | Local phone company | – |
| 559-298 | AT&T (local phone) | Local phone company | – |
| 559-299 | AT&T (local phone) | Local phone company | – |
| 559-314 | Onvoy | Internet / business phone carrier | – |
| 559-321 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 559-322 | AT&T (local phone) | Local phone company | – |
| 559-323 | AT&T (local phone) | Local phone company | – |
| 559-324 | AT&T (local phone) | Local phone company | – |
| 559-325 | AT&T (local phone) | Local phone company | – |
| 559-326 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 559-327 | AT&T (local phone) | Local phone company | – |
| 559-387 | AT&T (local phone) | Local phone company | 2013 |
| 559-392 | AT&T Mobility | Mobile carrier | – |
| 559-472 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 559-545 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 559-575 | Bandwidth | Internet / business phone carrier | 2014 |
| 559-578 | Verizon Wireless | Mobile carrier | 2015 |
| 559-593 | Verizon Wireless | Mobile carrier | 2001 |
| 559-599 | Fractel | Internet / business phone carrier | 2020 |
| 559-628 | Bandwidth | Internet / business phone carrier | 2021 |
| 559-649 | AT&T Mobility | Mobile carrier | 2021 |
| 559-701 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 559-712 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 559-765 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 559-767 | Verizon Wireless | Mobile carrier | 2022 |
| 559-770 | AT&T Mobility | Mobile carrier | 2015 |
| 559-797 | Tpx Communications | Internet / business phone carrier | 2001 |
| 559-818 | Nuso | Internet / business phone carrier | – |
| 559-826 | AT&T Mobility | Mobile carrier | 2014 |
| 559-862 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 559-872 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 559-874 | Onvoy | Internet / business phone carrier | 2023 |
| 559-882 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 559-900 | Onvoy | Internet / business phone carrier | – |
| 559-914 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 559-938 | Verizon Wireless | Mobile carrier | 2025 |
| 559-940 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 559-968 | T-Mobile (including Sprint) | Mobile carrier | 2025 |
| 559-971 | Intrado Communications | Phone company | 2026 |
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.