Prefix overview
Phone numbers in prefix 815-377
This page covers the 815-377 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
815-377
RATE CENTER
CRESCENTCY
CARRIER
LEVEL 3 COMMUNICATIONS, LLC - IL
IL
Prefix range
The prefix 815-377 includes numbers from 8153770000 to 8153779999.
This range is associated with the CRESCENTCY rate center and was originally assigned to LEVEL 3 COMMUNICATIONS, LLC - IL.
Numbers in this prefix
20 numbers