Prefix overview
Phone numbers in prefix 641-533
This page covers the 641-533 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
641-533
RATE CENTER
DERBY
CARRIER
GRAND RIVER MUTUAL TEL CO
IA
Prefix range
The prefix 641-533 includes numbers from 6415330000 to 6415339999.
This range is associated with the DERBY rate center and was originally assigned to GRAND RIVER MUTUAL TEL CO.
Numbers in this prefix
20 numbers