Phone numbers in Ben Lomond, California
Ben Lomond has 11 phone prefixes in area code 831.
Biggest holders: Onvoy, Verizon Wireless, Level 3 (Lumen). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 27%
- Local phone company 9%
- Internet / business phone carrier 64%
Every prefix in Ben Lomond
Search the first six digits of a number in this list. If it's here, the number started in Ben Lomond with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 831-218 | Teleport Communications America | Internet / business phone carrier | – |
| 831-246 | Verizon Wireless | Mobile carrier | – |
| 831-252 | AT&T Mobility | Mobile carrier | – |
| 831-278 | Verizon Wireless | Mobile carrier | – |
| 831-289 | Comcast | Internet / business phone carrier | 2022 |
| 831-336 | AT&T (local phone) | Local phone company | – |
| 831-401 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 831-532 | Onvoy | Internet / business phone carrier | – |
| 831-604 | Onvoy | Internet / business phone carrier | – |
| 831-609 | Onvoy | Internet / business phone carrier | – |
| 831-709 | Level 3 (Lumen) | Internet / business phone carrier | – |
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.