Prefix overview
Phone numbers in prefix 309-379
This page covers the 309-379 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
309-379
RATE CENTER
STANFORD
CARRIER
FRONTIER NORTH, INC. - IL
IL
Prefix range
The prefix 309-379 includes numbers from 3093790000 to 3093799999.
This range is associated with the STANFORD rate center and was originally assigned to FRONTIER NORTH, INC. - IL.
Numbers in this prefix
20 numbers