Prefix overview
Phone numbers in prefix 660-399
This page covers the 660-399 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
660-399
RATE CENTER
SO SEYMOUR
CARRIER
WINDSTREAM IOWA COMMUNICATIONS, INC.
MO
Prefix range
The prefix 660-399 includes numbers from 6603990000 to 6603999999.
This range is associated with the SO SEYMOUR rate center and was originally assigned to WINDSTREAM IOWA COMMUNICATIONS, INC..
Numbers in this prefix
20 numbers