Prefix overview
Phone numbers in prefix 815-491
This page covers the 815-491 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
815-491
RATE CENTER
ROCKFORD
CARRIER
NUSO, LLC
IL
Prefix range
The prefix 815-491 includes numbers from 8154910000 to 8154919999.
This range is associated with the ROCKFORD rate center and was originally assigned to NUSO, LLC.
Numbers in this prefix
20 numbers