Prefix overview
Phone numbers in prefix 321-366
This page covers the 321-366 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
321-366
RATE CENTER
MELBOURNE
CARRIER
IP HORIZON LLC
FL
Prefix range
The prefix 321-366 includes numbers from 3213660000 to 3213669999.
This range is associated with the MELBOURNE rate center and was originally assigned to IP HORIZON LLC.
Numbers in this prefix
20 numbers