Phone numbers in Castle Dale, Utah
Castle Dale has 8 phone prefixes in area code 435.
Biggest holders: Emery Telcom, Verizon Wireless. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 25%
- Phone company 75%
Every prefix in Castle Dale
Search the first six digits of a number in this list. If it's here, the number started in Castle Dale with the carrier shown. If it isn't, check the Utah page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 435-286 | Emery Telcom | Phone company | – |
| 435-381 | Emery Telcom | Phone company | – |
| 435-384 | Emery Telcom | Phone company | – |
| 435-609 | Verizon Wireless | Mobile carrier | – |
| 435-653 | Emery Telcom | Phone company | – |
| 435-687 | Emery Telcom | Phone company | – |
| 435-748 | Emery Telcom | Phone company | – |
| 435-749 | Verizon Wireless | 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.