Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
PALO ALTO prefixes in area code 650
NANPA records 145 assigned NXX blocks to rate center PALO ALTO in area code 650, 20.2% of the 717 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 22 holders hold those blocks, the largest being PACIFIC BELL (56), NEW CINGULAR WIRELESS PCS, LLC (15), LEVEL 3 COMMUNICATIONS, LLC - CA (13). The earliest assignment on record here is 2001-04-23 and the most recent 2026-08-19. 101 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
145 assigned blocks – 20.2% of 650
22 holders of record
101 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 650-213 | AT&T PACIFIC BELL | – | yes | yes |
| 650-223 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 650-233 | AT&T PACIFIC BELL | – | no | yes |
| 650-234 | AT&T PACIFIC BELL | – | no | yes |
| 650-236 | AT&T PACIFIC BELL | – | no | yes |
| 650-248 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-250 | T-Mobile T-MOBILE USA, INC. | 2016-04-29 | yes | yes |
| 650-251 | AT&T PACIFIC BELL | – | yes | yes |
| 650-252 | Peerless PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 2012-04-13 | yes | yes |
| 650-258 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2011-09-13 | yes | yes |
| 650-269 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 650-272 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 2013-08-19 | yes | yes |
| 650-283 | T-Mobile T-MOBILE USA, INC. | 2001-12-27 | yes | yes |
| 650-285 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2013-10-21 | yes | yes |
| 650-289 | AT&T PACIFIC BELL | – | yes | yes |
| 650-300 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 650-304 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2016-09-07 | yes | yes |
| 650-308 | AT&T PACIFIC BELL | 2010-12-23 | yes | yes |
| 650-313 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2017-08-24 | yes | yes |
| 650-319 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-320 | AT&T PACIFIC BELL | – | no | yes |
| 650-321 | AT&T PACIFIC BELL | – | no | yes |
| 650-322 | AT&T PACIFIC BELL | – | no | yes |
| 650-323 | AT&T PACIFIC BELL | – | no | yes |
| 650-324 | AT&T PACIFIC BELL | – | no | yes |
| 650-325 | AT&T PACIFIC BELL | – | no | yes |
| 650-326 | AT&T PACIFIC BELL | – | no | yes |
| 650-327 | AT&T PACIFIC BELL | – | no | yes |
| 650-328 | AT&T PACIFIC BELL | – | no | yes |
| 650-329 | AT&T PACIFIC BELL | – | no | yes |
| 650-330 | AT&T PACIFIC BELL | – | no | yes |
| 650-331 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-334 | T-Mobile T-MOBILE USA, INC. | 2016-01-15 | yes | yes |
| 650-352 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-353 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-354 | AT&T PACIFIC BELL | – | no | yes |
| 650-370 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2024-10-03 | yes | yes |
| 650-374 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2020-05-13 | yes | yes |
| 650-380 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2001-11-29 | yes | yes |
| 650-382 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | 2014-10-16 | yes | yes |
| 650-384 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 650-387 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-388 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-391 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 650-407 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2018-05-09 | yes | yes |
| 650-422 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2013-04-19 | yes | yes |
| 650-424 | AT&T PACIFIC BELL | – | yes | yes |
| 650-427 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 2006-12-27 | yes | yes |
| 650-433 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-441 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2015-09-04 | yes | yes |
| 650-444 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-460 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-10-17 | yes | yes |
| 650-461 | AT&T PACIFIC BELL | – | yes | yes |
| 650-462 | AT&T PACIFIC BELL | – | yes | yes |
| 650-463 | AT&T PACIFIC BELL | – | yes | yes |
| 650-468 | T-Mobile T-MOBILE USA, INC. | 2001-04-23 | yes | yes |
| 650-470 | AT&T PACIFIC BELL | – | yes | yes |
| 650-473 | AT&T PACIFIC BELL | – | no | yes |
| 650-475 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-485 | AT&T PACIFIC BELL | – | yes | yes |
| 650-493 | AT&T PACIFIC BELL | – | no | yes |
| 650-494 | AT&T PACIFIC BELL | – | yes | yes |
| 650-496 | AT&T PACIFIC BELL | – | no | yes |
| 650-497 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-498 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-505 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2018-02-06 | yes | yes |
| 650-507 | T-Mobile T-MOBILE USA, INC. | 2019-10-25 | yes | yes |
| 650-509 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2016-04-26 | yes | yes |
| 650-512 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2019-10-25 | yes | yes |
| 650-519 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2022-01-10 | yes | yes |
| 650-521 | Comcast COMCAST PHONE OF CALIFORNIA, LLC | 2005-08-04 | yes | yes |
| 650-531 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2020-03-26 | yes | yes |
| 650-543 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | no | yes |
| 650-546 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2015-08-31 | yes | yes |
| 650-561 | AT&T PACIFIC BELL | – | yes | yes |
| 650-565 | AT&T PACIFIC BELL | – | no | yes |
| 650-566 | AT&T PACIFIC BELL | – | no | yes |
| 650-575 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-586 | Telnyx TELNYX LLC | 2021-02-01 | yes | yes |
| 650-600 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 650-606 | Charter ONVOY SPECTRUM, LLC | 2024-01-04 | yes | yes |
| 650-613 | T-Mobile T-MOBILE USA, INC. | 2021-08-23 | yes | yes |
| 650-614 | AT&T PACIFIC BELL | – | yes | yes |
| 650-617 | AT&T PACIFIC BELL | – | yes | yes |
| 650-618 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 650-621 | AT&T PACIFIC BELL | – | yes | yes |
| 650-630 | T-Mobile METROPCS, INC. | 2001-08-22 | yes | yes |
| 650-643 | T-Mobile T-MOBILE USA, INC. | 2021-11-15 | yes | yes |
| 650-644 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 650-646 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-656 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2014-04-07 | yes | yes |
| 650-665 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-07-21 | yes | yes |
| 650-666 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-681 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 650-682 | UTILITY TELECOM GROUP, LLC - CA | – | yes | yes |
| 650-687 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 650-688 | AT&T PACIFIC BELL | – | yes | yes |
| 650-690 | AT&T AT&T - LOCAL | – | yes | yes |
| 650-698 | T-Mobile T-MOBILE USA, INC. | 2022-02-28 | yes | yes |
| 650-702 | NUSO, LLC | – | yes | yes |
| 650-704 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-709 | AIRESPRING, INC. | 2018-05-08 | yes | yes |
| 650-714 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-721 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-723 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-724 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-725 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-736 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-739 | AT&T PACIFIC BELL | – | yes | yes |
| 650-752 | AT&T PACIFIC BELL | – | yes | yes |
| 650-776 | T-Mobile METROPCS, INC. | – | yes | yes |
| 650-785 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2014-10-13 | yes | yes |
| 650-788 | FRACTEL, LLC | 2019-03-19 | yes | yes |
| 650-792 | Onvoy ONVOY, LLC - CA | 2026-08-19 | yes | yes |
| 650-796 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-798 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 650-799 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-800 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 650-804 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2002-08-21 | yes | yes |
| 650-812 | AT&T PACIFIC BELL | – | yes | yes |
| 650-813 | AT&T PACIFIC BELL | – | yes | yes |
| 650-814 | T-Mobile METROPCS, INC. | – | yes | yes |
| 650-815 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-833 | AT&T PACIFIC BELL | – | yes | yes |
| 650-838 | AT&T PACIFIC BELL | – | no | yes |
| 650-842 | AT&T PACIFIC BELL | – | yes | yes |
| 650-843 | AT&T PACIFIC BELL | – | yes | yes |
| 650-845 | AT&T PACIFIC BELL | – | yes | yes |
| 650-846 | AT&T PACIFIC BELL | – | no | yes |
| 650-847 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-849 | AT&T PACIFIC BELL | – | yes | yes |
| 650-852 | AT&T PACIFIC BELL | – | yes | yes |
| 650-853 | AT&T PACIFIC BELL | – | yes | yes |
| 650-854 | AT&T PACIFIC BELL | – | no | yes |
| 650-855 | AT&T PACIFIC BELL | – | yes | yes |
| 650-856 | AT&T PACIFIC BELL | – | no | yes |
| 650-857 | AT&T PACIFIC BELL | – | no | yes |
| 650-858 | AT&T PACIFIC BELL | – | no | yes |
| 650-859 | AT&T PACIFIC BELL | – | no | yes |
| 650-862 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 650-885 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2017-06-27 | yes | yes |
| 650-906 | T-Mobile METROPCS, INC. | – | yes | yes |
| 650-924 | T-Mobile METROPCS, INC. | – | yes | yes |
| 650-926 | AT&T PACIFIC BELL | – | no | yes |
| 650-999 | Onvoy ONVOY, LLC - CA | – | yes | yes |
The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.
Who holds the blocks
| Holder | Brand | Blocks | Share here |
|---|---|---|---|
| PACIFIC BELL | AT&T | 56 | 38.6% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 15 | 10.3% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 13 | 9% |
| T-MOBILE USA, INC. | T-Mobile | 11 | 7.6% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 10 | 6.9% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 7 | 4.8% |
| ONVOY, LLC - CA | Onvoy | 6 | 4.1% |
| METROPCS, INC. | T-Mobile | 5 | 3.4% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 4 | 2.8% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 3 | 2.1% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 2 | 1.4% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 2 | 1.4% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 2 | 1.4% |
| PEERLESS NETWORK OF CALIFORNIA, LLC - CA | Peerless | 1 | 0.7% |
| COMCAST PHONE OF CALIFORNIA, LLC | Comcast | 1 | 0.7% |
| TELNYX LLC | Telnyx | 1 | 0.7% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 0.7% |
| UTILITY TELECOM GROUP, LLC - CA | – | 1 | 0.7% |
| AT&T - LOCAL | AT&T | 1 | 0.7% |
| NUSO, LLC | – | 1 | 0.7% |
| AIRESPRING, INC. | – | 1 | 0.7% |
| FRACTEL, LLC | – | 1 | 0.7% |
Frequently asked
Which prefixes belong to PALO ALTO in area code 650?
145 blocks: 213, 223, 233, 234, 236, 248, 250, 251, 252, 258, 269, 272 and 133 more, all listed in the table above.
Which carriers have numbers in PALO ALTO?
PACIFIC BELL (56 blocks), NEW CINGULAR WIRELESS PCS, LLC (15 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (13 blocks), T-MOBILE USA, INC. (11 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (10 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (7 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is PALO ALTO a city?
It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.