Prefix overview
Phone numbers in prefix 531-666
This page covers the 531-666 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
531-666
RATE CENTER
FREMONT
CARRIER
FRACTEL, LLC
NE
Prefix range
The prefix 531-666 includes numbers from 5316660000 to 5316669999.
This range is associated with the FREMONT rate center and was originally assigned to FRACTEL, LLC.
Numbers in this prefix
20 numbers