SSNFRNCSCO prefixes in area code 650
NANPA records 90 assigned NXX blocks to rate center SSNFRNCSCO in area code 650, 12.6% 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. 21 holders hold those blocks, the largest being PACIFIC BELL (34), T-MOBILE USA, INC. (9), NEW CINGULAR WIRELESS PCS, LLC (8). The earliest assignment on record here is 2001-03-01 and the most recent 2026-10-30. 58 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.
Prefixes assigned here
| Prefix | Holder of record | Assigned | Pooled | In service |
|---|---|---|---|---|
| 650-201 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-205 | Spok SPOK, INC. | – | no | yes |
| 650-219 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-221 | SHELCOMM | 2024-09-12 | no | yes |
| 650-225 | AT&T PACIFIC BELL | – | no | yes |
| 650-228 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-238 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | – | yes | yes |
| 650-243 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 650-244 | AT&T PACIFIC BELL | – | no | yes |
| 650-246 | AT&T PACIFIC BELL | – | yes | yes |
| 650-255 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-256 | American Messaging AMERICAN MESSAGING SERVICES, LLC | – | no | yes |
| 650-266 | AT&T PACIFIC BELL | – | no | yes |
| 650-267 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-270 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-273 | ASTOUND BROADBAND, LLC - CA | – | yes | yes |
| 650-278 | T-Mobile T-MOBILE USA, INC. | 2001-12-27 | yes | yes |
| 650-291 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | – | no | yes |
| 650-296 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-303 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-333 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-351 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-360 | Onvoy ONVOY, LLC - CA | – | no | yes |
| 650-379 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 2017-09-12 | yes | yes |
| 650-392 | Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | – | yes | yes |
| 650-410 | Onvoy ONVOY, LLC - CA | 2016-05-11 | yes | yes |
| 650-416 | TPx U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | – | yes | yes |
| 650-438 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2001-10-18 | yes | yes |
| 650-442 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2022-09-26 | yes | yes |
| 650-452 | AT&T AT&T - LOCAL | – | yes | yes |
| 650-457 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2015-10-23 | yes | yes |
| 650-467 | AT&T PACIFIC BELL | – | no | yes |
| 650-491 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-502 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | 2019-02-08 | yes | yes |
| 650-515 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-534 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-540 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2020-08-28 | yes | yes |
| 650-553 | AT&T PACIFIC BELL | – | no | yes |
| 650-580 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-583 | AT&T PACIFIC BELL | – | no | yes |
| 650-588 | AT&T PACIFIC BELL | – | no | yes |
| 650-589 | AT&T PACIFIC BELL | – | no | yes |
| 650-615 | AT&T PACIFIC BELL | – | no | yes |
| 650-616 | AT&T PACIFIC BELL | – | no | yes |
| 650-624 | AT&T PACIFIC BELL | – | no | yes |
| 650-634 | AT&T PACIFIC BELL | – | yes | yes |
| 650-635 | AT&T PACIFIC BELL | – | no | yes |
| 650-636 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-671 | T-Mobile T-MOBILE USA, INC. | 2022-01-07 | yes | yes |
| 650-676 | UTILITY TELECOM GROUP, LLC - CA | 2005-03-07 | yes | yes |
| 650-677 | FRACTEL, LLC | 2019-05-20 | yes | yes |
| 650-708 | Onvoy ONVOY, LLC - CA | 2022-09-08 | yes | yes |
| 650-737 | AT&T PACIFIC BELL | – | yes | yes |
| 650-741 | AT&T PACIFIC BELL | – | yes | yes |
| 650-742 | AT&T PACIFIC BELL | – | no | yes |
| 650-745 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | yes | yes |
| 650-754 | AT&T PACIFIC BELL | – | yes | yes |
| 650-760 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 2023-06-02 | yes | yes |
| 650-763 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-784 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-794 | AT&T PACIFIC BELL | – | no | yes |
| 650-797 | AT&T NEW CINGULAR WIRELESS PCS, LLC | 2014-10-27 | yes | yes |
| 650-808 | AT&T PACIFIC BELL | – | yes | yes |
| 650-819 | T-Mobile T-MOBILE USA, INC. | 2026-10-30 | yes | no |
| 650-821 | AT&T TELEPORT COMMUNICATIONS AMERICA, LLC - CA | – | no | yes |
| 650-822 | Onvoy ONVOY, LLC - CA | 2015-03-25 | yes | yes |
| 650-825 | Verizon MCIMETRO ACCESS TRANSMISSION SERVICES LLC | – | yes | yes |
| 650-826 | T-Mobile T-MOBILE USA, INC. | – | yes | yes |
| 650-827 | AT&T PACIFIC BELL | – | yes | yes |
| 650-829 | AT&T PACIFIC BELL | – | no | yes |
| 650-834 | T-Mobile METROPCS, INC. | 2001-09-21 | yes | yes |
| 650-835 | IP HORIZON LLC | – | yes | yes |
| 650-837 | AT&T PACIFIC BELL | – | yes | yes |
| 650-866 | AT&T PACIFIC BELL | – | yes | yes |
| 650-869 | AT&T PACIFIC BELL | – | yes | yes |
| 650-870 | Bandwidth BANDWIDTH.COM CLEC, LLC - CA | – | yes | yes |
| 650-871 | AT&T PACIFIC BELL | – | no | yes |
| 650-872 | AT&T PACIFIC BELL | – | yes | yes |
| 650-873 | AT&T PACIFIC BELL | – | no | yes |
| 650-874 | AT&T PACIFIC BELL | – | no | yes |
| 650-875 | AT&T PACIFIC BELL | – | no | yes |
| 650-876 | AT&T PACIFIC BELL | – | no | yes |
| 650-877 | AT&T PACIFIC BELL | – | yes | yes |
| 650-878 | AT&T PACIFIC BELL | – | yes | yes |
| 650-892 | AT&T NEW CINGULAR WIRELESS PCS, LLC | – | no | yes |
| 650-910 | Onvoy ONVOY, LLC - CA | 2021-04-23 | yes | yes |
| 650-922 | Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 2001-03-01 | yes | yes |
| 650-952 | AT&T PACIFIC BELL | – | no | yes |
| 650-989 | Lumen LEVEL 3 COMMUNICATIONS, LLC - CA | – | yes | yes |
| 650-990 | Onvoy ONVOY, LLC - CA | 2026-06-01 | 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 | 34 | 37.8% |
| T-MOBILE USA, INC. | T-Mobile | 9 | 10% |
| NEW CINGULAR WIRELESS PCS, LLC | AT&T | 8 | 8.9% |
| LEVEL 3 COMMUNICATIONS, LLC - CA | Lumen | 6 | 6.7% |
| ONVOY, LLC - CA | Onvoy | 6 | 6.7% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Verizon | 4 | 4.4% |
| TELEPORT COMMUNICATIONS AMERICA, LLC - CA | AT&T | 4 | 4.4% |
| BANDWIDTH.COM CLEC, LLC - CA | Bandwidth | 3 | 3.3% |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | Verizon | 2 | 2.2% |
| U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | TPx | 2 | 2.2% |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | Verizon | 2 | 2.2% |
| SPOK, INC. | Spok | 1 | 1.1% |
| SHELCOMM | – | 1 | 1.1% |
| AMERICAN MESSAGING SERVICES, LLC | American Messaging | 1 | 1.1% |
| ASTOUND BROADBAND, LLC - CA | – | 1 | 1.1% |
| LEVEL 3 TELECOM OF CALIFORNIA, LP - CA | Lumen | 1 | 1.1% |
| AT&T - LOCAL | AT&T | 1 | 1.1% |
| UTILITY TELECOM GROUP, LLC - CA | – | 1 | 1.1% |
| FRACTEL, LLC | – | 1 | 1.1% |
| METROPCS, INC. | T-Mobile | 1 | 1.1% |
| IP HORIZON LLC | – | 1 | 1.1% |
Frequently asked
Which prefixes belong to SSNFRNCSCO in area code 650?
90 blocks: 201, 205, 219, 221, 225, 228, 238, 243, 244, 246, 255, 256 and 78 more, all listed in the table above.
Which carriers have numbers in SSNFRNCSCO?
PACIFIC BELL (34 blocks), T-MOBILE USA, INC. (9 blocks), NEW CINGULAR WIRELESS PCS, LLC (8 blocks), LEVEL 3 COMMUNICATIONS, LLC - CA (6 blocks), ONVOY, LLC - CA (6 blocks), MCIMETRO ACCESS TRANSMISSION SERVICES LLC (4 blocks). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.
Is SSNFRNCSCO 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.