Prefix overview
Phone numbers in prefix 401-303
This page covers the 401-303 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
401-303
RATE CENTER
WARREN
CARRIER
ONVOY SPECTRUM, LLC
RI
Prefix range
The prefix 401-303 includes numbers from 4013030000 to 4013039999.
This range is associated with the WARREN rate center and was originally assigned to ONVOY SPECTRUM, LLC.
Numbers in this prefix
20 numbers