Phone numbers in Pomona, California
Pomona has 67 phone prefixes in area codes 840, 909.
Biggest holders: AT&T Mobility, Frontier, T-Mobile (including Sprint). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 54%
- Local phone company 15%
- Internet / business phone carrier 30%
- Phone company 1%
Every prefix in Pomona
Search the first six digits of a number in this list. If it's here, the number started in Pomona with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 840-202 | AT&T Mobility | Mobile carrier | 2021 |
| 840-225 | AT&T Mobility | Mobile carrier | 2023 |
| 840-226 | Onvoy | Internet / business phone carrier | 2023 |
| 840-230 | Boost / Virgin Mobile | Mobile carrier | 2023 |
| 840-231 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 840-238 | AT&T Mobility | Mobile carrier | 2023 |
| 840-243 | T-Mobile (including Sprint) | Mobile carrier | 2023 |
| 840-259 | AT&T Mobility | Mobile carrier | 2024 |
| 840-260 | T-Mobile (including Sprint) | Mobile carrier | 2024 |
| 840-264 | AT&T Mobility | Mobile carrier | 2024 |
| 840-267 | AT&T Mobility | Mobile carrier | 2024 |
| 840-275 | Verizon Wireless | Mobile carrier | 2025 |
| 840-333 | Fractel | Internet / business phone carrier | 2020 |
| 840-345 | Fractel | Internet / business phone carrier | 2021 |
| 840-777 | Terra Nova Telecom | Internet / business phone carrier | 2020 |
| 840-837 | TON80 Communications | Internet / business phone carrier | 2022 |
| 909-236 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 909-242 | Tpx Communications | Internet / business phone carrier | 2007 |
| 909-263 | AT&T Mobility | Mobile carrier | – |
| 909-282 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 909-298 | Vonage America | Internet / business phone carrier | 2023 |
| 909-326 | Bandwidth | Internet / business phone carrier | 2013 |
| 909-374 | AT&T Mobility | Mobile carrier | 2001 |
| 909-397 | Frontier | Local phone company | – |
| 909-417 | Bandwidth | Internet / business phone carrier | 2016 |
| 909-455 | Verizon Wireless | Mobile carrier | – |
| 909-461 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 909-469 | Frontier | Local phone company | – |
| 909-508 | Shelcomm | Phone company | 2018 |
| 909-524 | Tpx Communications | Internet / business phone carrier | – |
| 909-525 | Tpx Communications | Internet / business phone carrier | – |
| 909-538 | T-Mobile (including Sprint) | Mobile carrier | 2005 |
| 909-576 | AT&T Mobility | Mobile carrier | – |
| 909-618 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 909-620 | Frontier | Local phone company | – |
| 909-622 | Frontier | Local phone company | – |
| 909-623 | Frontier | Local phone company | – |
| 909-629 | Frontier | Local phone company | – |
| 909-630 | Frontier | Local phone company | – |
| 909-632 | Tpx Communications | Internet / business phone carrier | – |
| 909-634 | MCImetro (Verizon Business) | Internet / business phone carrier | 2005 |
| 909-643 | MetroPCS (T-Mobile) | Mobile carrier | 2006 |
| 909-671 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 909-706 | Teleport Communications America | Internet / business phone carrier | – |
| 909-716 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
| 909-720 | AT&T Mobility | Mobile carrier | 2001 |
| 909-729 | Onvoy | Internet / business phone carrier | 2016 |
| 909-762 | Verizon Wireless | Mobile carrier | 2001 |
| 909-764 | Bandwidth | Internet / business phone carrier | 2006 |
| 909-766 | Onvoy | Internet / business phone carrier | – |
| 909-779 | AT&T Mobility | Mobile carrier | 2019 |
| 909-784 | Level 3 (Lumen) | Internet / business phone carrier | 2005 |
| 909-785 | AT&T Mobility | Mobile carrier | 2020 |
| 909-802 | AT&T (local phone) | Local phone company | – |
| 909-817 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 909-826 | AT&T Mobility | Mobile carrier | 2020 |
| 909-837 | Verizon Wireless | Mobile carrier | – |
| 909-847 | AT&T Mobility | Mobile carrier | 2020 |
| 909-865 | Frontier | Local phone company | – |
| 909-868 | Frontier | Local phone company | – |
| 909-896 | AT&T Mobility | Mobile carrier | 2001 |
| 909-924 | AT&T Mobility | Mobile carrier | 2020 |
| 909-928 | AT&T Mobility | Mobile carrier | 2020 |
| 909-940 | AT&T Mobility | Mobile carrier | 2020 |
| 909-967 | AT&T Mobility | Mobile carrier | 2002 |
| 909-973 | Verizon Wireless | Mobile carrier | 2002 |
| 909-992 | Verizon Wireless | Mobile carrier | 2004 |
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.