Phone numbers in Eureka, Nevada
Eureka has 10 phone prefixes in area code 775.
Biggest holders: Onvoy, AT&T (local phone), Utility Telecom Group. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 20%
- Local phone company 10%
- Internet / business phone carrier 60%
- Phone company 10%
Every prefix in Eureka
Search the first six digits of a number in this list. If it's here, the number started in Eureka with the carrier shown. If it isn't, check the Nevada page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 775-237 | AT&T (local phone) | Local phone company | – |
| 775-254 | Onvoy | Internet / business phone carrier | – |
| 775-270 | Utility Telecom Group | Phone company | 2001 |
| 775-318 | AT&T Mobility | Mobile carrier | 2002 |
| 775-367 | Onvoy | Internet / business phone carrier | – |
| 775-522 | Onvoy | Internet / business phone carrier | – |
| 775-551 | Onvoy | Internet / business phone carrier | – |
| 775-590 | Onvoy | Internet / business phone carrier | 2023 |
| 775-595 | Ringer Mobile | Mobile carrier | 2025 |
| 775-640 | Onvoy | 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.