Prefix overview
Phone numbers in prefix 307-378
This page covers the 307-378 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
307-378
RATE CENTER
ROCK RIVER
CARRIER
UNION TEL. CO.
WY
Prefix range
The prefix 307-378 includes numbers from 3073780000 to 3073789999.
This range is associated with the ROCK RIVER rate center and was originally assigned to UNION TEL. CO..
Numbers in this prefix
20 numbers