Phone numbers in Riverside, California
Riverside has 155 phone prefixes in area codes 909, 951.
Biggest holders: AT&T (local phone), AT&T Mobility, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 53%
- Local phone company 19%
- Internet / business phone carrier 25%
- Paging service 4%
Every prefix in Riverside
Search the first six digits of a number in this list. If it's here, the number started in Riverside with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 909-209 | American Messaging Services | Paging service | – |
| 909-290 | Spok | Paging service | – |
| 909-339 | 33 Wireless | Mobile carrier | – |
| 909-412 | Spok | Paging service | – |
| 909-416 | Spok | Paging service | – |
| 909-540 | 33 Wireless | Mobile carrier | – |
| 909-812 | American Messaging Services | Paging service | – |
| 951-201 | Verizon Wireless | Mobile carrier | – |
| 951-202 | Verizon Wireless | Mobile carrier | – |
| 951-203 | Verizon Wireless | Mobile carrier | – |
| 951-204 | Verizon Wireless | Mobile carrier | – |
| 951-205 | Verizon Wireless | Mobile carrier | – |
| 951-206 | Verizon Wireless | Mobile carrier | – |
| 951-212 | Verizon Wireless | Mobile carrier | – |
| 951-213 | T-Mobile (including Sprint) | Mobile carrier | 2007 |
| 951-217 | Verizon Wireless | Mobile carrier | – |
| 951-218 | Verizon Wireless | Mobile carrier | – |
| 951-222 | AT&T (local phone) | Local phone company | – |
| 951-224 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 951-231 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 951-232 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 951-233 | Verizon Wireless | Mobile carrier | – |
| 951-235 | Verizon Wireless | Mobile carrier | – |
| 951-236 | AT&T Mobility | Mobile carrier | 2001 |
| 951-237 | AT&T Mobility | Mobile carrier | – |
| 951-241 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 951-248 | AT&T (local phone) | Local phone company | – |
| 951-250 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 951-255 | Verizon Wireless | Mobile carrier | – |
| 951-261 | MetroPCS (T-Mobile) | Mobile carrier | 2008 |
| 951-263 | Level 3 (Lumen) | Internet / business phone carrier | 2009 |
| 951-266 | Peerless Network Of California | Internet / business phone carrier | 2009 |
| 951-274 | AT&T (local phone) | Local phone company | – |
| 951-275 | AT&T (local phone) | Local phone company | – |
| 951-276 | AT&T (local phone) | Local phone company | – |
| 951-286 | MetroPCS (T-Mobile) | Mobile carrier | 2009 |
| 951-288 | AT&T Mobility | Mobile carrier | 2001 |
| 951-289 | Level 3 (Lumen) | Internet / business phone carrier | 2010 |
| 951-295 | Verizon Wireless | Mobile carrier | – |
| 951-300 | Tpx Communications | Internet / business phone carrier | – |
| 951-312 | AT&T Mobility | Mobile carrier | 2001 |
| 951-313 | AT&T Mobility | Mobile carrier | 2001 |
| 951-315 | AT&T Mobility | Mobile carrier | 2001 |
| 951-318 | AT&T Mobility | Mobile carrier | 2001 |
| 951-320 | AT&T (local phone) | Local phone company | – |
| 951-321 | AT&T (local phone) | Local phone company | – |
| 951-323 | AT&T Mobility | Mobile carrier | 2001 |
| 951-328 | AT&T (local phone) | Local phone company | – |
| 951-329 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 951-333 | AT&T Mobility | Mobile carrier | 2001 |
| 951-334 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-335 | Bandwidth | Internet / business phone carrier | 2011 |
| 951-341 | AT&T (local phone) | Local phone company | – |
| 951-342 | AT&T (local phone) | Local phone company | – |
| 951-344 | Bandwidth | Internet / business phone carrier | – |
| 951-346 | Matrix Telecom, Llc. S/i/i Tnci | Internet / business phone carrier | – |
| 951-347 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-367 | Tpx Communications | Internet / business phone carrier | – |
| 951-368 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 951-369 | AT&T (local phone) | Local phone company | – |
| 951-374 | Bandwidth | Internet / business phone carrier | 2013 |
| 951-377 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 951-384 | Level 3 (Lumen) | Internet / business phone carrier | 2013 |
| 951-394 | Bandwidth | Internet / business phone carrier | 2014 |
| 951-405 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 951-410 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 951-425 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
| 951-452 | AT&T Mobility | Mobile carrier | 2001 |
| 951-453 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-462 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 951-465 | Bandwidth | Internet / business phone carrier | – |
| 951-495 | Teleport Communications America | Internet / business phone carrier | 2016 |
| 951-500 | AT&T Mobility | Mobile carrier | 2003 |
| 951-504 | American Messaging Services | Paging service | – |
| 951-505 | Verizon Wireless | Mobile carrier | – |
| 951-512 | Teleport Communications America | Internet / business phone carrier | 2018 |
| 951-521 | AT&T Mobility | Mobile carrier | 2020 |
| 951-522 | AT&T Mobility | Mobile carrier | – |
| 951-529 | Verizon Wireless | Mobile carrier | – |
| 951-530 | Tpx Communications | Internet / business phone carrier | – |
| 951-533 | Verizon Wireless | Mobile carrier | – |
| 951-534 | Charter / Spectrum | Internet / business phone carrier | 2005 |
| 951-536 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-538 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-542 | AT&T Mobility | Mobile carrier | 2020 |
| 951-543 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 951-544 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-548 | T-Mobile (including Sprint) | Mobile carrier | 2020 |
| 951-554 | AT&T Mobility | Mobile carrier | 2020 |
| 951-558 | AT&T Mobility | Mobile carrier | 2020 |
| 951-560 | AT&T Mobility | Mobile carrier | 2020 |
| 951-568 | AT&T Mobility | Mobile carrier | 2020 |
| 951-573 | AT&T Mobility | Mobile carrier | 2020 |
| 951-584 | AT&T Mobility | Mobile carrier | 2021 |
| 951-586 | AT&T Mobility | Mobile carrier | 2021 |
| 951-589 | AT&T Mobility | Mobile carrier | 2021 |
| 951-592 | Onvoy | Internet / business phone carrier | 2021 |
| 951-618 | Onvoy | Internet / business phone carrier | 2022 |
| 951-631 | Onvoy | Internet / business phone carrier | 2023 |
| 951-640 | AT&T Mobility | Mobile carrier | – |
| 951-660 | AT&T Mobility | Mobile carrier | – |
| 951-662 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-675 | Verizon Wireless | Mobile carrier | – |
| 951-680 | AT&T (local phone) | Local phone company | – |
| 951-682 | AT&T (local phone) | Local phone company | – |
| 951-683 | AT&T (local phone) | Local phone company | – |
| 951-684 | AT&T (local phone) | Local phone company | – |
| 951-686 | AT&T (local phone) | Local phone company | – |
| 951-712 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-715 | AT&T (local phone) | Local phone company | – |
| 951-717 | Commio | Internet / business phone carrier | 2023 |
| 951-732 | MetroPCS (T-Mobile) | Mobile carrier | 2008 |
| 951-742 | T-Mobile (including Sprint) | Mobile carrier | 2005 |
| 951-743 | AT&T Mobility | Mobile carrier | – |
| 951-750 | Teleport Communications America | Internet / business phone carrier | – |
| 951-756 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 951-758 | Onvoy | Internet / business phone carrier | 2017 |
| 951-774 | AT&T (local phone) | Local phone company | – |
| 951-777 | Bandwidth | Internet / business phone carrier | – |
| 951-778 | AT&T (local phone) | Local phone company | – |
| 951-779 | AT&T (local phone) | Local phone company | – |
| 951-781 | AT&T (local phone) | Local phone company | – |
| 951-782 | AT&T (local phone) | Local phone company | – |
| 951-783 | Charter / Spectrum | Internet / business phone carrier | 2016 |
| 951-784 | AT&T (local phone) | Local phone company | – |
| 951-786 | AT&T (local phone) | Local phone company | – |
| 951-787 | AT&T (local phone) | Local phone company | – |
| 951-788 | AT&T (local phone) | Local phone company | – |
| 951-801 | Level 3 (Lumen) | Internet / business phone carrier | 2005 |
| 951-809 | Verizon Wireless | Mobile carrier | – |
| 951-823 | T-Mobile (including Sprint) | Mobile carrier | 2006 |
| 951-824 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 951-826 | AT&T (local phone) | Local phone company | – |
| 951-827 | AT&T (local phone) | Local phone company | – |
| 951-830 | T-Mobile (including Sprint) | Mobile carrier | – |
| 951-836 | Verizon Wireless | Mobile carrier | 2001 |
| 951-848 | Bandwidth | Internet / business phone carrier | – |
| 951-850 | AT&T Mobility | Mobile carrier | 2001 |
| 951-866 | Fractel | Internet / business phone carrier | 2021 |
| 951-877 | Fractel | Internet / business phone carrier | 2019 |
| 951-880 | MCImetro (Verizon Business) | Internet / business phone carrier | 2005 |
| 951-888 | Bandwidth | Internet / business phone carrier | – |
| 951-892 | MCImetro (Verizon Business) | Internet / business phone carrier | 2003 |
| 951-897 | Verizon Wireless | Mobile carrier | – |
| 951-899 | Fractel | Internet / business phone carrier | 2020 |
| 951-900 | Onvoy | Internet / business phone carrier | – |
| 951-905 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 951-906 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 951-907 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 951-941 | AT&T Mobility | Mobile carrier | 2005 |
| 951-955 | AT&T (local phone) | Local phone company | – |
| 951-961 | AT&T Mobility | Mobile carrier | 2001 |
| 951-965 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 951-966 | Verizon Wireless | Mobile carrier | – |
| 951-990 | Verizon Wireless | Mobile carrier | – |
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.