Phone numbers in Ephraim, Utah
Ephraim has 3 phone prefixes in area code 435.
Biggest holders: Manti Tel, T-Mobile (including Sprint), AT&T Mobility. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 67%
- Phone company 33%
Every prefix in Ephraim
Search the first six digits of a number in this list. If it's here, the number started in Ephraim with the carrier shown. If it isn't, check the Utah page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 435-283 | Manti Tel | Phone company | – |
| 435-314 | T-Mobile (including Sprint) | Mobile carrier | 2010 |
| 435-340 | AT&T Mobility | Mobile 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.