Prefix overview
Phone numbers in prefix 401-221
This page covers the 401-221 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
401-221
RATE CENTER
PROVIDENCE
CARRIER
SPOK, INC.
RI
Prefix range
The prefix 401-221 includes numbers from 4012210000 to 4012219999.
This range is associated with the PROVIDENCE rate center and was originally assigned to SPOK, INC..
Numbers in this prefix
20 numbers