Prefix overview
Phone numbers in prefix 309-400
This page covers the 309-400 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
309-400
RATE CENTER
ROCKISLAND
CARRIER
AT&T ENTERPRISES, LLC
IL
Prefix range
The prefix 309-400 includes numbers from 3094000000 to 3094009999.
This range is associated with the ROCKISLAND rate center and was originally assigned to AT&T ENTERPRISES, LLC.
Numbers in this prefix
20 numbers