Prefix overview
Phone numbers in prefix 401-366
This page covers the 401-366 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
401-366
RATE CENTER
PORTSMOUTH
CARRIER
PAETEC ITEL, LLC
RI
Prefix range
The prefix 401-366 includes numbers from 4013660000 to 4013669999.
This range is associated with the PORTSMOUTH rate center and was originally assigned to PAETEC ITEL, LLC.
Numbers in this prefix
20 numbers