Phone numbers in Round Mt., Nevada
Round Mt. has 6 phone prefixes in area code 775.
Biggest holders: Onvoy, Verizon Wireless, AT&T (local phone). This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 17%
- Local phone company 17%
- Internet / business phone carrier 67%
Every prefix in Round Mt.
Search the first six digits of a number in this list. If it's here, the number started in Round Mt. with the carrier shown. If it isn't, check the Nevada page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 775-346 | Verizon Wireless | Mobile carrier | 2002 |
| 775-377 | AT&T (local phone) | Local phone company | – |
| 775-655 | Onvoy | Internet / business phone carrier | – |
| 775-860 | Onvoy | Internet / business phone carrier | – |
| 775-890 | Onvoy | Internet / business phone carrier | – |
| 775-988 | Fractel | Internet / business phone carrier | 2019 |
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.