Prefix overview
Phone numbers in prefix 661-399
This page covers the 661-399 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
661-399
RATE CENTER
BKFD NORTH
CARRIER
PACIFIC BELL
CA
Prefix range
The prefix 661-399 includes numbers from 6613990000 to 6613999999.
This range is associated with the BKFD NORTH rate center and was originally assigned to PACIFIC BELL.
Numbers in this prefix
20 numbers