Prefix overview
Phone numbers in prefix 408-340
This page covers the 408-340 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
408-340
RATE CENTER
CAMPBELL
CARRIER
MCIMETRO ACCESS TRANSMISSION SERVICES LLC
CA
Prefix range
The prefix 408-340 includes numbers from 4083400000 to 4083409999.
This range is associated with the CAMPBELL rate center and was originally assigned to MCIMETRO ACCESS TRANSMISSION SERVICES LLC.
Numbers in this prefix
20 numbers