Prefix overview
Phone numbers in prefix 307-428
This page covers the 307-428 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
307-428
RATE CENTER
DOUGLAS
CARRIER
T-MOBILE USA, INC.
WY
Prefix range
The prefix 307-428 includes numbers from 3074280000 to 3074289999.
This range is associated with the DOUGLAS rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers