Phone numbers in Palo Alto, California
Palo Alto has 145 phone prefixes in area code 650.
Biggest holders: AT&T (local phone), AT&T Mobility, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 28%
- Local phone company 39%
- Internet / business phone carrier 31%
- Phone company 1%
Every prefix in Palo Alto
Search the first six digits of a number in this list. If it's here, the number started in Palo Alto with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 650-213 | AT&T (local phone) | Local phone company | – |
| 650-223 | Tpx Communications | Internet / business phone carrier | – |
| 650-233 | AT&T (local phone) | Local phone company | – |
| 650-234 | AT&T (local phone) | Local phone company | – |
| 650-236 | AT&T (local phone) | Local phone company | – |
| 650-248 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-250 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 650-251 | AT&T (local phone) | Local phone company | – |
| 650-252 | Peerless Network Of California | Internet / business phone carrier | 2012 |
| 650-258 | Teleport Communications America | Internet / business phone carrier | 2011 |
| 650-269 | Verizon Wireless | Mobile carrier | – |
| 650-272 | MCImetro (Verizon Business) | Internet / business phone carrier | 2013 |
| 650-283 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 650-285 | Bandwidth | Internet / business phone carrier | 2013 |
| 650-289 | AT&T (local phone) | Local phone company | – |
| 650-300 | Onvoy | Internet / business phone carrier | – |
| 650-304 | AT&T Mobility | Mobile carrier | 2016 |
| 650-308 | AT&T (local phone) | Local phone company | 2010 |
| 650-313 | Verizon Wireless | Mobile carrier | 2017 |
| 650-319 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-320 | AT&T (local phone) | Local phone company | – |
| 650-321 | AT&T (local phone) | Local phone company | – |
| 650-322 | AT&T (local phone) | Local phone company | – |
| 650-323 | AT&T (local phone) | Local phone company | – |
| 650-324 | AT&T (local phone) | Local phone company | – |
| 650-325 | AT&T (local phone) | Local phone company | – |
| 650-326 | AT&T (local phone) | Local phone company | – |
| 650-327 | AT&T (local phone) | Local phone company | – |
| 650-328 | AT&T (local phone) | Local phone company | – |
| 650-329 | AT&T (local phone) | Local phone company | – |
| 650-330 | AT&T (local phone) | Local phone company | – |
| 650-331 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-334 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 650-352 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-353 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-354 | AT&T (local phone) | Local phone company | – |
| 650-370 | Bandwidth | Internet / business phone carrier | 2024 |
| 650-374 | AT&T Mobility | Mobile carrier | 2020 |
| 650-380 | Verizon Wireless | Mobile carrier | 2001 |
| 650-382 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 650-384 | Teleport Communications America | Internet / business phone carrier | – |
| 650-387 | AT&T Mobility | Mobile carrier | – |
| 650-388 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-391 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-407 | Verizon Wireless | Mobile carrier | 2018 |
| 650-422 | Verizon Wireless | Mobile carrier | 2013 |
| 650-424 | AT&T (local phone) | Local phone company | – |
| 650-427 | MCImetro (Verizon Business) | Internet / business phone carrier | 2006 |
| 650-433 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-441 | Verizon Wireless | Mobile carrier | 2015 |
| 650-444 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-460 | AT&T Mobility | Mobile carrier | 2014 |
| 650-461 | AT&T (local phone) | Local phone company | – |
| 650-462 | AT&T (local phone) | Local phone company | – |
| 650-463 | AT&T (local phone) | Local phone company | – |
| 650-468 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 650-470 | AT&T (local phone) | Local phone company | – |
| 650-473 | AT&T (local phone) | Local phone company | – |
| 650-475 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-485 | AT&T (local phone) | Local phone company | – |
| 650-493 | AT&T (local phone) | Local phone company | – |
| 650-494 | AT&T (local phone) | Local phone company | – |
| 650-496 | AT&T (local phone) | Local phone company | – |
| 650-497 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-498 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-505 | AT&T Mobility | Mobile carrier | 2018 |
| 650-507 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
| 650-509 | Verizon Wireless | Mobile carrier | 2016 |
| 650-512 | AT&T Mobility | Mobile carrier | 2019 |
| 650-519 | AT&T Mobility | Mobile carrier | 2022 |
| 650-521 | Comcast | Internet / business phone carrier | 2005 |
| 650-531 | Verizon Wireless | Mobile carrier | 2020 |
| 650-543 | Tpx Communications | Internet / business phone carrier | – |
| 650-546 | Teleport Communications America | Internet / business phone carrier | 2015 |
| 650-561 | AT&T (local phone) | Local phone company | – |
| 650-565 | AT&T (local phone) | Local phone company | – |
| 650-566 | AT&T (local phone) | Local phone company | – |
| 650-575 | AT&T Mobility | Mobile carrier | – |
| 650-586 | Telnyx | Internet / business phone carrier | 2021 |
| 650-600 | Onvoy | Internet / business phone carrier | – |
| 650-606 | Onvoy | Internet / business phone carrier | 2024 |
| 650-613 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 650-614 | AT&T (local phone) | Local phone company | – |
| 650-617 | AT&T (local phone) | Local phone company | – |
| 650-618 | Onvoy | Internet / business phone carrier | – |
| 650-621 | AT&T (local phone) | Local phone company | – |
| 650-630 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 650-643 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 650-644 | AT&T Mobility | Mobile carrier | – |
| 650-646 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-656 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 650-665 | Verizon Wireless | Mobile carrier | 2014 |
| 650-666 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-681 | Tpx Communications | Internet / business phone carrier | – |
| 650-682 | Utility Telecom Group | Phone company | – |
| 650-687 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-688 | AT&T (local phone) | Local phone company | – |
| 650-690 | AT&T (local phone) | Local phone company | – |
| 650-698 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 650-702 | Nuso | Internet / business phone carrier | – |
| 650-704 | AT&T Mobility | Mobile carrier | – |
| 650-709 | Airespring | Phone company | 2018 |
| 650-714 | AT&T Mobility | Mobile carrier | – |
| 650-721 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-723 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-724 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-725 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-736 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-739 | AT&T (local phone) | Local phone company | – |
| 650-752 | AT&T (local phone) | Local phone company | – |
| 650-776 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 650-785 | Verizon Wireless | Mobile carrier | 2014 |
| 650-788 | Fractel | Internet / business phone carrier | 2019 |
| 650-792 | Onvoy | Internet / business phone carrier | 2026 |
| 650-796 | AT&T Mobility | Mobile carrier | – |
| 650-798 | Teleport Communications America | Internet / business phone carrier | – |
| 650-799 | AT&T Mobility | Mobile carrier | – |
| 650-800 | Onvoy | Internet / business phone carrier | – |
| 650-804 | AT&T Mobility | Mobile carrier | 2002 |
| 650-812 | AT&T (local phone) | Local phone company | – |
| 650-813 | AT&T (local phone) | Local phone company | – |
| 650-814 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 650-815 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-833 | AT&T (local phone) | Local phone company | – |
| 650-838 | AT&T (local phone) | Local phone company | – |
| 650-842 | AT&T (local phone) | Local phone company | – |
| 650-843 | AT&T (local phone) | Local phone company | – |
| 650-845 | AT&T (local phone) | Local phone company | – |
| 650-846 | AT&T (local phone) | Local phone company | – |
| 650-847 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-849 | AT&T (local phone) | Local phone company | – |
| 650-852 | AT&T (local phone) | Local phone company | – |
| 650-853 | AT&T (local phone) | Local phone company | – |
| 650-854 | AT&T (local phone) | Local phone company | – |
| 650-855 | AT&T (local phone) | Local phone company | – |
| 650-856 | AT&T (local phone) | Local phone company | – |
| 650-857 | AT&T (local phone) | Local phone company | – |
| 650-858 | AT&T (local phone) | Local phone company | – |
| 650-859 | AT&T (local phone) | Local phone company | – |
| 650-862 | AT&T Mobility | Mobile carrier | – |
| 650-885 | Level 3 (Lumen) | Internet / business phone carrier | 2017 |
| 650-906 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 650-924 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 650-926 | AT&T (local phone) | Local phone company | – |
| 650-999 | Onvoy | Internet / business phone 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.