Phone numbers in Gilroy, California
Gilroy has 26 phone prefixes in area codes 408, 669.
Biggest holders: Onvoy, Frontier, Bandwidth. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 15%
- Local phone company 19%
- Internet / business phone carrier 62%
- Phone company 4%
Every prefix in Gilroy
Search the first six digits of a number in this list. If it's here, the number started in Gilroy with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 408-337 | Charter / Spectrum | Internet / business phone carrier | 2009 |
| 408-413 | Onvoy | Internet / business phone carrier | – |
| 408-427 | Teleport Communications America | Internet / business phone carrier | – |
| 408-430 | Bandwidth | Internet / business phone carrier | 2010 |
| 408-443 | Onvoy | Internet / business phone carrier | 2023 |
| 408-632 | North County Communication | Phone company | – |
| 408-665 | MetroPCS (T-Mobile) | Mobile carrier | 2007 |
| 408-713 | Bandwidth | Internet / business phone carrier | 2011 |
| 408-767 | MetroPCS (T-Mobile) | Mobile carrier | 2011 |
| 408-840 | AT&T (local phone) | Local phone company | – |
| 408-842 | Frontier | Local phone company | – |
| 408-843 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 408-846 | Frontier | Local phone company | – |
| 408-847 | Frontier | Local phone company | – |
| 408-848 | Frontier | Local phone company | – |
| 408-852 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 669-205 | Onvoy | Internet / business phone carrier | 2016 |
| 669-239 | AT&T Mobility | Mobile carrier | 2017 |
| 669-305 | Bandwidth | Internet / business phone carrier | 2019 |
| 669-327 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
| 669-345 | Fractel | Internet / business phone carrier | 2020 |
| 669-375 | Onvoy | Internet / business phone carrier | 2025 |
| 669-469 | Onvoy | Internet / business phone carrier | 2024 |
| 669-500 | Onvoy | Internet / business phone carrier | – |
| 669-599 | Fractel | Internet / business phone carrier | 2021 |
| 669-746 | TON80 Communications | Internet / business phone carrier | 2022 |
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.