Phone numbers in South Placer, California
South Placer has 32 phone prefixes in area codes 279, 916.
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 22%
- Local phone company 31%
- Internet / business phone carrier 41%
- Phone company 6%
Every prefix in South Placer
Search the first six digits of a number in this list. If it's here, the number started in South Placer with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 279-206 | Bandwidth | Internet / business phone carrier | 2020 |
| 279-217 | Onvoy | Internet / business phone carrier | 2021 |
| 279-227 | Bandwidth | Internet / business phone carrier | 2022 |
| 279-244 | Onvoy | Internet / business phone carrier | 2023 |
| 279-262 | Onvoy | Internet / business phone carrier | 2024 |
| 279-295 | Onvoy | Internet / business phone carrier | 2026 |
| 279-999 | Onvoy | Internet / business phone carrier | 2018 |
| 916-250 | AT&T Mobility | Mobile carrier | 2015 |
| 916-251 | Matrix Telecom, Llc. S/i/i Tnci | Internet / business phone carrier | – |
| 916-259 | Onvoy | Internet / business phone carrier | – |
| 916-276 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 916-303 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 916-315 | AT&T (local phone) | Local phone company | – |
| 916-316 | AT&T Mobility | Mobile carrier | – |
| 916-415 | AT&T (local phone) | Local phone company | – |
| 916-435 | AT&T (local phone) | Local phone company | – |
| 916-577 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 916-624 | AT&T (local phone) | Local phone company | – |
| 916-625 | AT&T (local phone) | Local phone company | – |
| 916-626 | Fidium Enterprise Services | Phone company | – |
| 916-630 | AT&T (local phone) | Local phone company | – |
| 916-632 | AT&T (local phone) | Local phone company | – |
| 916-652 | AT&T (local phone) | Local phone company | – |
| 916-659 | Verizon Wireless | Mobile carrier | 2020 |
| 916-660 | AT&T (local phone) | Local phone company | – |
| 916-663 | AT&T (local phone) | Local phone company | – |
| 916-672 | Fidium Enterprise Services | Phone company | 2005 |
| 916-741 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 916-778 | Verizon Wireless | Mobile carrier | – |
| 916-824 | Teleport Communications America | Internet / business phone carrier | – |
| 916-938 | AT&T Mobility | Mobile carrier | 2021 |
| 916-975 | Onvoy | 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.