Phone numbers in Placentia, California
Placentia has 37 phone prefixes in area codes 657, 714.
Biggest holders: AT&T (local phone), Bandwidth, MetroPCS (T-Mobile). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 16%
- Local phone company 38%
- Internet / business phone carrier 43%
- Phone company 3%
Every prefix in Placentia
Search the first six digits of a number in this list. If it's here, the number started in Placentia with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 657-216 | Bandwidth | Internet / business phone carrier | 2011 |
| 657-226 | Bandwidth | Internet / business phone carrier | 2014 |
| 657-258 | Charter / Spectrum | Internet / business phone carrier | 2014 |
| 657-275 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 657-315 | AT&T Enterprises | Phone company | – |
| 657-373 | Bandwidth | Internet / business phone carrier | 2019 |
| 657-444 | Bandwidth | Internet / business phone carrier | – |
| 657-626 | TON80 Communications | Internet / business phone carrier | 2022 |
| 657-688 | Fractel | Internet / business phone carrier | 2020 |
| 657-708 | Verizon Wireless | Mobile carrier | 2023 |
| 657-882 | Verizon Wireless | Mobile carrier | 2026 |
| 714-203 | Tpx Communications | Internet / business phone carrier | – |
| 714-223 | AT&T (local phone) | Local phone company | – |
| 714-364 | Onvoy | Internet / business phone carrier | – |
| 714-419 | Onvoy | Internet / business phone carrier | 2023 |
| 714-499 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 714-524 | AT&T (local phone) | Local phone company | – |
| 714-528 | AT&T (local phone) | Local phone company | – |
| 714-572 | AT&T (local phone) | Local phone company | – |
| 714-577 | AT&T (local phone) | Local phone company | – |
| 714-579 | AT&T (local phone) | Local phone company | – |
| 714-610 | MetroPCS (T-Mobile) | Mobile carrier | 2009 |
| 714-646 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 714-729 | Tpx Communications | Internet / business phone carrier | – |
| 714-792 | AT&T (local phone) | Local phone company | – |
| 714-798 | MetroPCS (T-Mobile) | Mobile carrier | 2009 |
| 714-854 | AT&T (local phone) | Local phone company | – |
| 714-924 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 714-927 | AT&T (local phone) | Local phone company | – |
| 714-961 | AT&T (local phone) | Local phone company | – |
| 714-982 | MCImetro (Verizon Business) | Internet / business phone carrier | 2001 |
| 714-983 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 714-984 | Teleport Communications America | Internet / business phone carrier | – |
| 714-985 | AT&T (local phone) | Local phone company | – |
| 714-986 | AT&T (local phone) | Local phone company | – |
| 714-993 | AT&T (local phone) | Local phone company | – |
| 714-996 | AT&T (local phone) | Local phone company | – |
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.