Prefix overview
Phone numbers in prefix 310-389
This page covers the 310-389 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
310-389
RATE CENTER
CMTN GRDN
CARRIER
AMERICAN MESSAGING SERVICES, LLC
CA
Prefix range
The prefix 310-389 includes numbers from 3103890000 to 3103899999.
This range is associated with the CMTN GRDN rate center and was originally assigned to AMERICAN MESSAGING SERVICES, LLC.
Numbers in this prefix
20 numbers