Phone numbers in Ssnfrncsco, California
Ssnfrncsco has 89 phone prefixes in area code 650.
Biggest holders: AT&T (local phone), T-Mobile (including Sprint), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 21%
- Local phone company 39%
- Internet / business phone carrier 35%
- Paging service 2%
- Phone company 2%
Every prefix in Ssnfrncsco
Search the first six digits of a number in this list. If it's here, the number started in Ssnfrncsco with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 650-201 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-205 | Spok | Paging service | – |
| 650-219 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-221 | Shelcomm | Phone company | 2024 |
| 650-225 | AT&T (local phone) | Local phone company | – |
| 650-228 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-238 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-243 | Tpx Communications | Internet / business phone carrier | – |
| 650-244 | AT&T (local phone) | Local phone company | – |
| 650-246 | AT&T (local phone) | Local phone company | – |
| 650-255 | AT&T Mobility | Mobile carrier | – |
| 650-256 | American Messaging Services | Paging service | – |
| 650-266 | AT&T (local phone) | Local phone company | – |
| 650-267 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-270 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-273 | Astound Broadband | Internet / business phone carrier | – |
| 650-278 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 650-291 | Verizon Wireless | Mobile carrier | – |
| 650-296 | AT&T Mobility | Mobile carrier | – |
| 650-303 | AT&T Mobility | Mobile carrier | – |
| 650-333 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-351 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-360 | Onvoy | Internet / business phone carrier | – |
| 650-379 | MCImetro (Verizon Business) | Internet / business phone carrier | 2017 |
| 650-392 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-410 | Onvoy | Internet / business phone carrier | 2016 |
| 650-416 | Tpx Communications | Internet / business phone carrier | – |
| 650-438 | AT&T Mobility | Mobile carrier | 2001 |
| 650-442 | Bandwidth | Internet / business phone carrier | 2022 |
| 650-452 | AT&T (local phone) | Local phone company | – |
| 650-457 | AT&T Mobility | Mobile carrier | 2015 |
| 650-467 | AT&T (local phone) | Local phone company | – |
| 650-491 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-502 | Bandwidth | Internet / business phone carrier | 2019 |
| 650-515 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-534 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-540 | Teleport Communications America | Internet / business phone carrier | 2020 |
| 650-553 | AT&T (local phone) | Local phone company | – |
| 650-580 | AT&T Mobility | Mobile carrier | – |
| 650-583 | AT&T (local phone) | Local phone company | – |
| 650-588 | AT&T (local phone) | Local phone company | – |
| 650-589 | AT&T (local phone) | Local phone company | – |
| 650-615 | AT&T (local phone) | Local phone company | – |
| 650-616 | AT&T (local phone) | Local phone company | – |
| 650-624 | AT&T (local phone) | Local phone company | – |
| 650-634 | AT&T (local phone) | Local phone company | – |
| 650-635 | AT&T (local phone) | Local phone company | – |
| 650-636 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-671 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 650-676 | Utility Telecom Group | Phone company | 2005 |
| 650-677 | Fractel | Internet / business phone carrier | 2019 |
| 650-708 | Onvoy | Internet / business phone carrier | 2022 |
| 650-737 | AT&T (local phone) | Local phone company | – |
| 650-741 | AT&T (local phone) | Local phone company | – |
| 650-742 | AT&T (local phone) | Local phone company | – |
| 650-745 | Teleport Communications America | Internet / business phone carrier | – |
| 650-754 | AT&T (local phone) | Local phone company | – |
| 650-760 | Teleport Communications America | Internet / business phone carrier | 2023 |
| 650-763 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-784 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-794 | AT&T (local phone) | Local phone company | – |
| 650-797 | AT&T Mobility | Mobile carrier | 2014 |
| 650-808 | AT&T (local phone) | Local phone company | – |
| 650-821 | Teleport Communications America | Internet / business phone carrier | – |
| 650-822 | Onvoy | Internet / business phone carrier | 2015 |
| 650-825 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 650-826 | T-Mobile (including Sprint) | Mobile carrier | – |
| 650-827 | AT&T (local phone) | Local phone company | – |
| 650-829 | AT&T (local phone) | Local phone company | – |
| 650-834 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 650-835 | IP Horizon | Internet / business phone carrier | – |
| 650-837 | AT&T (local phone) | Local phone company | – |
| 650-866 | AT&T (local phone) | Local phone company | – |
| 650-869 | AT&T (local phone) | Local phone company | – |
| 650-870 | Bandwidth | Internet / business phone carrier | – |
| 650-871 | AT&T (local phone) | Local phone company | – |
| 650-872 | AT&T (local phone) | Local phone company | – |
| 650-873 | AT&T (local phone) | Local phone company | – |
| 650-874 | AT&T (local phone) | Local phone company | – |
| 650-875 | AT&T (local phone) | Local phone company | – |
| 650-876 | AT&T (local phone) | Local phone company | – |
| 650-877 | AT&T (local phone) | Local phone company | – |
| 650-878 | AT&T (local phone) | Local phone company | – |
| 650-892 | AT&T Mobility | Mobile carrier | – |
| 650-910 | Onvoy | Internet / business phone carrier | 2021 |
| 650-922 | Verizon Wireless | Mobile carrier | 2001 |
| 650-952 | AT&T (local phone) | Local phone company | – |
| 650-989 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 650-990 | Onvoy | Internet / business phone carrier | 2026 |
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.