Prefix overview
Phone numbers in prefix 415-388
This page covers the 415-388 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
415-388
RATE CENTER
MILLVALLEY
CARRIER
PACIFIC BELL
CA
Prefix range
The prefix 415-388 includes numbers from 4153880000 to 4153889999.
This range is associated with the MILLVALLEY rate center and was originally assigned to PACIFIC BELL.
Numbers in this prefix
20 numbers