Prefix overview
Phone numbers in prefix 667-399
This page covers the 667-399 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
667-399
RATE CENTER
UNION BDG
CARRIER
HD CARRIER LLC
MD
Prefix range
The prefix 667-399 includes numbers from 6673990000 to 6673999999.
This range is associated with the UNION BDG rate center and was originally assigned to HD CARRIER LLC.
Numbers in this prefix
20 numbers