Prefix overview
Phone numbers in prefix 773-400
This page covers the 773-400 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
773-400
RATE CENTER
CHICGOZN02
CARRIER
AMERICAN MESSAGING SERVICES, LLC
IL
Prefix range
The prefix 773-400 includes numbers from 7734000000 to 7734009999.
This range is associated with the CHICGOZN02 rate center and was originally assigned to AMERICAN MESSAGING SERVICES, LLC.
Numbers in this prefix
20 numbers