Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records
SAN MATEO prefixes in area code 650
NANPA records 126 assigned NXX blocks to rate center SAN MATEO in area code 650, 17.6% 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. 20 holders hold those blocks, the largest being PACIFIC BELL (49), NEW CINGULAR WIRELESS PCS, LLC (18), T-MOBILE USA, INC. (15). The earliest assignment on record here is 2001-09-21 and the most recent 2026-06-01. 79 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
126 assigned blocks – 17.6% of 650
20 holders of record
79 of them pooled in 1,000-number lots
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 650-200 | Twilio TWILIO INTERNATIONAL, INC. | – | yes | yes |
| 650-202 | UTILITY TELECOM GROUP, LLC - CA | – | yes | yes |
| 650-212 | AT&T PACIFIC BELL | – | yes | yes |
| 650-217 | Spok SPOK, INC. | – | no | yes |
| 650-218 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-222 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-227 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-235 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-240 | Onvoy ONVOY, LLC - CA | – | yes | yes |
| 650-242 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-245 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-274 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-281 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-286 | AT&T PACIFIC BELL | – | no | yes |
| 650-287 | AT&T PACIFIC BELL | – | yes | yes |
| 650-288 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-292 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | no | yes |
| 650-293 | AT&T PACIFIC BELL | – | yes | yes |
| 650-294 | AT&T PACIFIC BELL | – | yes | yes |
| 650-295 | AT&T PACIFIC BELL | – | yes | yes |
| 650-312 | AT&T PACIFIC BELL | – | no | yes |
| 650-315 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-340 | AT&T PACIFIC BELL | – | no | yes |
| 650-341 | AT&T PACIFIC BELL | – | no | yes |
| 650-342 | AT&T PACIFIC BELL | – | no | yes |
| 650-343 | AT&T PACIFIC BELL | – | no | yes |
| 650-344 | AT&T PACIFIC BELL | – | no | yes |
| 650-345 | AT&T PACIFIC BELL | – | no | yes |
| 650-346 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-347 | AT&T PACIFIC BELL | – | no | yes |
| 650-348 | AT&T PACIFIC BELL | – | no | yes |
| 650-349 | AT&T PACIFIC BELL | – | no | yes |
| 650-350 | AT&T PACIFIC BELL | – | yes | yes |
| 650-356 | AT&T PACIFIC BELL | – | yes | yes |
| 650-357 | AT&T PACIFIC BELL | – | no | yes |
| 650-358 | AT&T PACIFIC BELL | – | no | yes |
| 650-371 | Spok SPOK, INC. | – | no | yes |
| 650-372 | AT&T PACIFIC BELL | – | yes | yes |
| 650-373 | AT&T PACIFIC BELL | – | no | yes |
| 650-375 | AT&T PACIFIC BELL | – | yes | yes |
| 650-376 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-377 | AT&T PACIFIC BELL | – | yes | yes |
| 650-378 | AT&T PACIFIC BELL | – | no | yes |
| 650-389 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-393 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 650-398 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2018-01-08 | yes | yes |
| 650-401 | AT&T PACIFIC BELL | – | no | yes |
| 650-403 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | no | yes |
| 650-418 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2019-03-20 | yes | yes |
| 650-425 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-430 | T-Mobile T-MOBILE USA, INC. | 2001-12-27 | no | yes |
| 650-431 | T-Mobile T-MOBILE USA, INC. | 2015-09-11 | yes | yes |
| 650-432 | AT&T PACIFIC BELL | – | no | yes |
| 650-435 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2015-02-16 | yes | yes |
| 650-436 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2015-09-08 | yes | yes |
| 650-437 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2014-03-03 | yes | yes |
| 650-445 | T-Mobile T-MOBILE USA, INC. | 2013-07-22 | yes | yes |
| 650-458 | ASTOUND BROADBAND, LLC - CA | – | yes | yes |
| 650-477 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | yes | yes |
| 650-483 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-484 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2016-07-08 | yes | yes |
| 650-504 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-513 | AT&T PACIFIC BELL | – | yes | yes |
| 650-514 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | 2019-03-22 | yes | yes |
| 650-520 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-522 | AT&T PACIFIC BELL | – | yes | yes |
| 650-523 | Onvoy ONVOY, LLC - CA | – | no | yes |
| 650-524 | AT&T PACIFIC BELL | – | yes | yes |
| 650-525 | AT&T PACIFIC BELL | – | yes | yes |
| 650-532 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 650-533 | T-Mobile METROPCS, INC. | – | yes | yes |
| 650-539 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-541 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2022-01-10 | yes | yes |
| 650-544 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-548 | AT&T PACIFIC BELL | – | no | yes |
| 650-554 | AT&T PACIFIC BELL | – | yes | yes |
| 650-558 | AT&T PACIFIC BELL | – | no | yes |
| 650-570 | AT&T PACIFIC BELL | – | yes | yes |
| 650-571 | AT&T PACIFIC BELL | – | yes | yes |
| 650-572 | AT&T PACIFIC BELL | – | no | yes |
| 650-573 | AT&T PACIFIC BELL | – | no | yes |
| 650-574 | AT&T PACIFIC BELL | – | yes | yes |
| 650-576 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-577 | AT&T PACIFIC BELL | – | yes | yes |
| 650-578 | AT&T PACIFIC BELL | – | no | yes |
| 650-579 | AT&T PACIFIC BELL | – | no | yes |
| 650-581 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 650-612 | AT&T PACIFIC BELL | – | no | yes |
| 650-619 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-627 | AT&T PACIFIC BELL | – | yes | yes |
| 650-629 | FRACTEL, LLC | 2021-09-22 | yes | yes |
| 650-638 | AT&T PACIFIC BELL | – | yes | yes |
| 650-639 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2024-11-25 | yes | yes |
| 650-642 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-645 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 650-650 | Onvoy ONVOY, LLC - CA | 2022-09-27 | yes | yes |
| 650-653 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 650-655 | AT&T PACIFIC BELL | – | no | yes |
| 650-659 | Charter ONVOY SPECTRUM, LLC | 2025-09-16 | yes | yes |
| 650-667 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-09-03 | yes | yes |
| 650-678 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 650-685 | AT&T PACIFIC BELL | – | no | yes |
| 650-696 | AT&T PACIFIC BELL | – | yes | yes |
| 650-699 | FRACTEL, LLC | 2019-03-19 | yes | yes |
| 650-703 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-706 | Onvoy ONVOY, LLC - CA | 2023-04-07 | yes | yes |
| 650-715 | Onvoy ONVOY, LLC - CA | 2022-09-02 | yes | yes |
| 650-727 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2014-06-03 | yes | yes |
| 650-740 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-753 | T-Mobile T-MOBILE USA, INC. | 2014-09-24 | yes | yes |
| 650-759 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 650-762 | AT&T PACIFIC BELL | – | yes | yes |
| 650-766 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-773 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2001-11-29 | no | yes |
| 650-778 | Onvoy ONVOY, LLC - CA | 2026-06-01 | yes | no |
| 650-781 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 650-787 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-844 | FRACTEL, LLC | 2020-08-25 | yes | yes |
| 650-863 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | yes | yes |
| 650-865 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2016-10-28 | yes | yes |
| 650-867 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-888 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-918 | AT&T AT&T - LOCAL | – | yes | yes |
| 650-921 | T-Mobile METROPCS, INC. | 2001-09-21 | no | yes |
| 650-931 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 650-954 | T-Mobile T-MOBILE USA, INC. | – | 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 | 49 | 38.9% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 18 | 14.3% |
| T-MOBILE USA, INC. | T-Mobile | 15 | 11.9% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 7 | 5.6% |
| ONVOY, LLC - CA | Onvoy | 6 | 4.8% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 5 | 4% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 5 | 4% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 3 | 2.4% |
| FRACTEL, LLC | – | 3 | 2.4% |
| SPOK, INC. | Spok | 2 | 1.6% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 2 | 1.6% |
| METROPCS, INC. | T-Mobile | 2 | 1.6% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 2 | 1.6% |
| TWILIO INTERNATIONAL, INC. | Twilio | 1 | 0.8% |
| UTILITY TELECOM GROUP, LLC - CA | – | 1 | 0.8% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 0.8% |
| ASTOUND BROADBAND, LLC - CA | – | 1 | 0.8% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 1 | 0.8% |
| ONVOY SPECTRUM, LLC | Charter | 1 | 0.8% |
| AT&T - LOCAL | AT&T | 1 | 0.8% |
Frequently asked
Which prefixes belong to SAN MATEO in area code 650?
126 blocks: 200, 202, 212, 217, 218, 222, 227, 235, 240, 242, 245, 274 and 114 more, all listed in the table above.
Which carriers have numbers in SAN MATEO?
PACIFIC BELL (49 blocks), NEW CINGULAR WIRELESS PCS, LLC (18 blocks), T-MOBILE USA, INC. (15 blocks), CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (7 blocks), ONVOY, LLC - CA (6 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (5 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is SAN MATEO 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.