Prefix overview
Phone numbers in prefix 331-309
This page covers the 331-309 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
331-309
RATE CENTER
LEMONT
CARRIER
COMMIO, LLC
IL
Prefix range
The prefix 331-309 includes numbers from 3313090000 to 3313099999.
This range is associated with the LEMONT rate center and was originally assigned to COMMIO, LLC.
Numbers in this prefix
20 numbers