Prefix overview
Phone numbers in prefix 641-421
This page covers the 641-421 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
641-421
RATE CENTER
MASON CITY
CARRIER
QWEST CORPORATION
IA
Prefix range
The prefix 641-421 includes numbers from 6414210000 to 6414219999.
This range is associated with the MASON CITY rate center and was originally assigned to QWEST CORPORATION.
Numbers in this prefix
20 numbers