Prefix overview
Phone numbers in prefix 310-328
This page covers the 310-328 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
310-328
RATE CENTER
TORRANCE
CARRIER
PACIFIC BELL
CA
Prefix range
The prefix 310-328 includes numbers from 3103280000 to 3103289999.
This range is associated with the TORRANCE rate center and was originally assigned to PACIFIC BELL.
Numbers in this prefix
20 numbers