Prefix overview
Phone numbers in prefix 320-440
This page covers the 320-440 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
320-440
RATE CENTER
COSMOS
CARRIER
MCC TELEPHONY OF MINNESOTA, LLC - MN
MN
Prefix range
The prefix 320-440 includes numbers from 3204400000 to 3204409999.
This range is associated with the COSMOS rate center and was originally assigned to MCC TELEPHONY OF MINNESOTA, LLC - MN.
Numbers in this prefix
20 numbers