Prefix overview
Phone numbers in prefix 815-204
This page covers the 815-204 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
815-204
RATE CENTER
CRYSTAL LK
CARRIER
SPOK, INC.
IL
Prefix range
The prefix 815-204 includes numbers from 8152040000 to 8152049999.
This range is associated with the CRYSTAL LK rate center and was originally assigned to SPOK, INC..
Numbers in this prefix
20 numbers