Phone numbers in Ramona, California
Ramona has 15 phone prefixes in area codes 442, 760.
Biggest holders: AT&T (local phone), Level 3 (Lumen), Onvoy. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 13%
- Local phone company 20%
- Internet / business phone carrier 53%
- Phone company 13%
Every prefix in Ramona
Search the first six digits of a number in this list. If it's here, the number started in Ramona with the carrier shown. If it isn't, check the California page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 442-240 | FIVE9 | Phone company | 2023 |
| 442-358 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 760-239 | Level 3 (Lumen) | Internet / business phone carrier | 2002 |
| 760-315 | AT&T Mobility | Mobile carrier | – |
| 760-440 | Comcast | Internet / business phone carrier | – |
| 760-551 | North County Communication | Phone company | – |
| 760-654 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 760-787 | AT&T (local phone) | Local phone company | – |
| 760-788 | AT&T (local phone) | Local phone company | – |
| 760-789 | AT&T (local phone) | Local phone company | – |
| 760-825 | Onvoy | Internet / business phone carrier | – |
| 760-869 | Commio | Internet / business phone carrier | 2023 |
| 760-870 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 760-896 | Onvoy | Internet / business phone carrier | – |
| 760-906 | Teleport Communications America | Internet / business phone carrier | 2010 |
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.