Prefix overview
Phone numbers in prefix 310-255
This page covers the 310-255 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
310-255
RATE CENTER
SNMN SNMN
CARRIER
PACIFIC BELL (COMPETITIVE)
CA
Prefix range
The prefix 310-255 includes numbers from 3102550000 to 3102559999.
This range is associated with the SNMN SNMN rate center and was originally assigned to PACIFIC BELL (COMPETITIVE).
Numbers in this prefix
20 numbers