Phone numbers in Barstow, California
Barstow has 24 phone prefixes in area codes 442, 760.
Biggest holders: Frontier, T-Mobile (including Sprint), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 33%
- Local phone company 21%
- Internet / business phone carrier 42%
- Phone company 4%
Every prefix in Barstow
Search the first six digits of a number in this list. If it's here, the number started in Barstow with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 442-235 | Verizon Wireless | Mobile carrier | 2014 |
| 442-280 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
| 442-295 | MCImetro (Verizon Business) | Internet / business phone carrier | 2016 |
| 442-309 | Verizon Wireless | Mobile carrier | 2019 |
| 442-347 | T-Mobile (including Sprint) | Mobile carrier | 2015 |
| 442-455 | Onvoy | Internet / business phone carrier | 2021 |
| 442-485 | Onvoy | Internet / business phone carrier | 2025 |
| 442-867 | Fractel | Internet / business phone carrier | 2021 |
| 760-252 | Frontier | Local phone company | – |
| 760-255 | Frontier | Local phone company | – |
| 760-256 | Frontier | Local phone company | – |
| 760-267 | AT&T Mobility | Mobile carrier | 2001 |
| 760-282 | Bandwidth | Internet / business phone carrier | – |
| 760-308 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 760-447 | AT&T Mobility | Mobile carrier | 2001 |
| 760-577 | Frontier | Local phone company | – |
| 760-590 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 760-606 | Onvoy | Internet / business phone carrier | – |
| 760-678 | Bandwidth | Internet / business phone carrier | 2010 |
| 760-718 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 760-818 | Charter / Spectrum | Internet / business phone carrier | 2013 |
| 760-957 | Frontier | Local phone company | – |
| 760-979 | T-Mobile (including Sprint) | Mobile carrier | 2011 |
| 760-988 | Utility Telecom Group | 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.