Prefix overview
Phone numbers in prefix 331-399
This page covers the 331-399 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
331-399
RATE CENTER
DOWNERSGRV
CARRIER
FRACTEL, LLC
IL
Prefix range
The prefix 331-399 includes numbers from 3313990000 to 3313999999.
This range is associated with the DOWNERSGRV rate center and was originally assigned to FRACTEL, LLC.
Numbers in this prefix
20 numbers