Prefix overview
Phone numbers in prefix 435-257
This page covers the 435-257 prefix in the United States. It shows where numbers come from, which carrier is linked to the range, and how this block is structured.
If you are looking for a specific number, you can continue to its dedicated phone page. Otherwise, this page helps you understand the broader number block behind it.
PREFIX
435-257
RATE CENTER
TREMONTON
CARRIER
CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT
UT
Prefix range
The prefix 435-257 includes numbers from 4352570000 to 4352579999.
This range is associated with the TREMONTON rate center and was originally assigned to CITIZENS TELECOM-UTAH DBA FRONTIER COMM OF UT.
Numbers in this prefix
20 numbers