Phone numbers in Modesto, California
Modesto has 148 phone prefixes in area codes 209, 350, 559.
Biggest holders: AT&T (local phone), AT&T Mobility, Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 43%
- Local phone company 30%
- Internet / business phone carrier 24%
- Paging service 1%
- Phone company 2%
Every prefix in Modesto
Search the first six digits of a number in this list. If it's here, the number started in Modesto with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 209-204 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 209-209 | Onvoy | Internet / business phone carrier | 2022 |
| 209-214 | MetroPCS (T-Mobile) | Mobile carrier | 2009 |
| 209-222 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 209-225 | Verizon Wireless | Mobile carrier | 2011 |
| 209-232 | Tpx Communications | Internet / business phone carrier | 2009 |
| 209-236 | AT&T (local phone) | Local phone company | – |
| 209-238 | AT&T (local phone) | Local phone company | – |
| 209-241 | T-Mobile (including Sprint) | Mobile carrier | – |
| 209-247 | AT&T Mobility | Mobile carrier | 2004 |
| 209-248 | Bandwidth | Internet / business phone carrier | – |
| 209-272 | T-Mobile (including Sprint) | Mobile carrier | 2012 |
| 209-281 | AT&T Mobility | Mobile carrier | 2015 |
| 209-284 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 209-287 | AT&T Mobility | Mobile carrier | 2015 |
| 209-289 | XO California | Phone company | 2014 |
| 209-300 | Onvoy | Internet / business phone carrier | – |
| 209-301 | MetroPCS (T-Mobile) | Mobile carrier | 2018 |
| 209-303 | AT&T Mobility | Mobile carrier | 2001 |
| 209-312 | AT&T Mobility | Mobile carrier | 2001 |
| 209-324 | AT&T Mobility | Mobile carrier | – |
| 209-338 | Tpx Communications | Internet / business phone carrier | – |
| 209-341 | AT&T (local phone) | Local phone company | – |
| 209-342 | AT&T (local phone) | Local phone company | – |
| 209-343 | Tpx Communications | Internet / business phone carrier | – |
| 209-344 | American Messaging Services | Paging service | – |
| 209-345 | T-Mobile (including Sprint) | Mobile carrier | – |
| 209-353 | Bandwidth | Internet / business phone carrier | 2013 |
| 209-360 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 209-380 | AT&T Mobility | Mobile carrier | – |
| 209-402 | Verizon Wireless | Mobile carrier | – |
| 209-404 | Verizon Wireless | Mobile carrier | – |
| 209-408 | Comcast | Internet / business phone carrier | 2007 |
| 209-409 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 209-412 | AT&T Mobility | Mobile carrier | 2019 |
| 209-416 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 209-422 | Comcast | Internet / business phone carrier | 2015 |
| 209-424 | Verizon Wireless | Mobile carrier | 2020 |
| 209-447 | Verizon Wireless | Mobile carrier | 2015 |
| 209-450 | MetroPCS (T-Mobile) | Mobile carrier | 2006 |
| 209-458 | MCImetro (Verizon Business) | Internet / business phone carrier | 2018 |
| 209-480 | Verizon Wireless | Mobile carrier | – |
| 209-484 | Verizon Wireless | Mobile carrier | – |
| 209-486 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 209-488 | MetroPCS (T-Mobile) | Mobile carrier | 2018 |
| 209-491 | AT&T (local phone) | Local phone company | – |
| 209-492 | AT&T (local phone) | Local phone company | – |
| 209-494 | T-Mobile (including Sprint) | Mobile carrier | 2019 |
| 209-495 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 209-496 | AT&T Mobility | Mobile carrier | 2002 |
| 209-497 | Utility Telecom Group | Phone company | 2015 |
| 209-499 | AT&T Mobility | Mobile carrier | 2001 |
| 209-501 | AT&T Mobility | Mobile carrier | 2020 |
| 209-505 | AT&T Mobility | Mobile carrier | 2001 |
| 209-520 | American Messaging Services | Paging service | – |
| 209-521 | AT&T (local phone) | Local phone company | – |
| 209-522 | AT&T (local phone) | Local phone company | – |
| 209-523 | AT&T (local phone) | Local phone company | – |
| 209-524 | AT&T (local phone) | Local phone company | – |
| 209-525 | AT&T (local phone) | Local phone company | – |
| 209-526 | AT&T (local phone) | Local phone company | – |
| 209-527 | AT&T (local phone) | Local phone company | – |
| 209-529 | AT&T (local phone) | Local phone company | – |
| 209-530 | AT&T (local phone) | Local phone company | – |
| 209-531 | AT&T (local phone) | Local phone company | – |
| 209-534 | T-Mobile (including Sprint) | Mobile carrier | 2001 |
| 209-537 | AT&T (local phone) | Local phone company | – |
| 209-538 | AT&T (local phone) | Local phone company | – |
| 209-541 | AT&T (local phone) | Local phone company | – |
| 209-543 | AT&T (local phone) | Local phone company | – |
| 209-544 | AT&T (local phone) | Local phone company | – |
| 209-545 | AT&T (local phone) | Local phone company | – |
| 209-548 | AT&T (local phone) | Local phone company | – |
| 209-549 | AT&T (local phone) | Local phone company | – |
| 209-550 | AT&T (local phone) | Local phone company | – |
| 209-551 | AT&T (local phone) | Local phone company | – |
| 209-552 | AT&T (local phone) | Local phone company | – |
| 209-554 | Onvoy | Internet / business phone carrier | – |
| 209-556 | AT&T (local phone) | Local phone company | – |
| 209-557 | AT&T (local phone) | Local phone company | – |
| 209-558 | AT&T (local phone) | Local phone company | – |
| 209-566 | Level 3 (Lumen) | Internet / business phone carrier | 2008 |
| 209-567 | AT&T (local phone) | Local phone company | – |
| 209-568 | Level 3 (Lumen) | Internet / business phone carrier | 2005 |
| 209-569 | AT&T (local phone) | Local phone company | – |
| 209-571 | AT&T (local phone) | Local phone company | – |
| 209-572 | AT&T (local phone) | Local phone company | – |
| 209-573 | AT&T (local phone) | Local phone company | – |
| 209-574 | AT&T (local phone) | Local phone company | – |
| 209-575 | AT&T (local phone) | Local phone company | – |
| 209-576 | AT&T (local phone) | Local phone company | – |
| 209-577 | AT&T (local phone) | Local phone company | – |
| 209-578 | AT&T (local phone) | Local phone company | – |
| 209-579 | AT&T (local phone) | Local phone company | – |
| 209-581 | AT&T (local phone) | Local phone company | – |
| 209-589 | Onvoy | Internet / business phone carrier | 2009 |
| 209-593 | Onvoy | Internet / business phone carrier | – |
| 209-595 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 209-596 | Verizon Wireless | Mobile carrier | 2006 |
| 209-602 | AT&T Mobility | Mobile carrier | – |
| 209-604 | AT&T Mobility | Mobile carrier | – |
| 209-605 | AT&T Mobility | Mobile carrier | – |
| 209-606 | AT&T Mobility | Mobile carrier | – |
| 209-613 | AT&T Mobility | Mobile carrier | – |
| 209-614 | AT&T Mobility | Mobile carrier | – |
| 209-618 | MetroPCS (T-Mobile) | Mobile carrier | 2019 |
| 209-622 | Bandwidth | Internet / business phone carrier | – |
| 209-652 | MetroPCS (T-Mobile) | Mobile carrier | – |
| 209-653 | Onvoy | Internet / business phone carrier | – |
| 209-661 | AT&T Mobility | Mobile carrier | 2011 |
| 209-672 | Verizon Wireless | Mobile carrier | 2017 |
| 209-681 | Onvoy | Internet / business phone carrier | – |
| 209-702 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 209-718 | Bandwidth | Internet / business phone carrier | – |
| 209-735 | AT&T (local phone) | Local phone company | 2005 |
| 209-750 | AT&T Mobility | Mobile carrier | 2020 |
| 209-758 | Onvoy | Internet / business phone carrier | – |
| 209-765 | AT&T Mobility | Mobile carrier | – |
| 209-771 | AT&T Mobility | Mobile carrier | 2020 |
| 209-799 | Fractel | Internet / business phone carrier | 2020 |
| 209-809 | Level 3 (Lumen) | Internet / business phone carrier | 2010 |
| 209-818 | Teleport Communications America | Internet / business phone carrier | – |
| 209-846 | Comcast | Internet / business phone carrier | 2006 |
| 209-849 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 209-857 | T-Mobile (including Sprint) | Mobile carrier | 2014 |
| 209-859 | Comcast | Internet / business phone carrier | 2020 |
| 209-860 | Utility Telecom Group | Phone company | 2021 |
| 209-872 | AT&T Mobility | Mobile carrier | 2001 |
| 209-876 | Verizon Wireless | Mobile carrier | 2022 |
| 209-900 | Onvoy | Internet / business phone carrier | – |
| 209-918 | AT&T Mobility | Mobile carrier | – |
| 209-961 | Boost / Virgin Mobile | Mobile carrier | 2022 |
| 209-968 | AT&T Mobility | Mobile carrier | – |
| 209-971 | Tpx Communications | Internet / business phone carrier | 2022 |
| 209-985 | Verizon Wireless | Mobile carrier | – |
| 209-988 | AT&T Mobility | Mobile carrier | – |
| 209-996 | AT&T Mobility | Mobile carrier | – |
| 350-207 | Nuso | Internet / business phone carrier | – |
| 350-216 | Commio | Internet / business phone carrier | 2023 |
| 350-220 | AT&T Mobility | Mobile carrier | 2024 |
| 350-226 | Onvoy | Internet / business phone carrier | 2024 |
| 350-230 | AT&T Mobility | Mobile carrier | 2024 |
| 350-238 | Verizon Wireless | Mobile carrier | 2025 |
| 350-256 | Onvoy | Internet / business phone carrier | 2025 |
| 350-261 | Onvoy | Internet / business phone carrier | 2026 |
| 350-263 | Onvoy | Internet / business phone carrier | 2026 |
| 350-353 | Boost / Virgin Mobile | Mobile carrier | 2025 |
| 559-766 | AT&T (local phone) | Local phone company | – |
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.