Phone numbers in Tracy, California
Tracy has 36 phone prefixes in area codes 209, 350.
Biggest holders: AT&T (local phone), Onvoy, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 36%
- Local phone company 22%
- Internet / business phone carrier 42%
Every prefix in Tracy
Search the first six digits of a number in this list. If it's here, the number started in Tracy with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 209-207 | Verizon Wireless | Mobile carrier | 2007 |
| 209-221 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 209-229 | Tpx Communications | Internet / business phone carrier | – |
| 209-237 | MCImetro (Verizon Business) | Internet / business phone carrier | 2016 |
| 209-278 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 209-319 | Bandwidth | Internet / business phone carrier | 2019 |
| 209-321 | T-Mobile (including Sprint) | Mobile carrier | – |
| 209-346 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 209-362 | Verizon Wireless | Mobile carrier | 2014 |
| 209-407 | Onvoy | Internet / business phone carrier | 2011 |
| 209-597 | Verizon Wireless | Mobile carrier | 2009 |
| 209-627 | IP Horizon | Internet / business phone carrier | – |
| 209-637 | AT&T Mobility | Mobile carrier | 2015 |
| 209-640 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 209-650 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 209-654 | Onvoy | Internet / business phone carrier | 2023 |
| 209-666 | Onvoy | Internet / business phone carrier | – |
| 209-699 | Fractel | Internet / business phone carrier | 2020 |
| 209-740 | T-Mobile (including Sprint) | Mobile carrier | 2002 |
| 209-814 | Verizon Wireless | Mobile carrier | – |
| 209-820 | Tpx Communications | Internet / business phone carrier | – |
| 209-830 | AT&T (local phone) | Local phone company | – |
| 209-831 | AT&T (local phone) | Local phone company | – |
| 209-832 | AT&T (local phone) | Local phone company | – |
| 209-833 | AT&T (local phone) | Local phone company | – |
| 209-834 | AT&T (local phone) | Local phone company | – |
| 209-835 | AT&T (local phone) | Local phone company | – |
| 209-836 | AT&T (local phone) | Local phone company | – |
| 209-839 | AT&T (local phone) | Local phone company | – |
| 209-855 | MetroPCS (T-Mobile) | Mobile carrier | 2008 |
| 209-879 | Comcast | Internet / business phone carrier | – |
| 209-914 | AT&T Mobility | Mobile carrier | – |
| 350-227 | Onvoy | Internet / business phone carrier | 2024 |
| 350-250 | Onvoy | Internet / business phone carrier | 2022 |
| 350-254 | AT&T Mobility | Mobile carrier | 2025 |
| 350-900 | Onvoy | Internet / business phone carrier | 2023 |
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.