Prefix overview
Phone numbers in prefix 340-555
This page covers the 340-555 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
340-555
RATE CENTER
DIR ASST
CARRIER
MULTIPLE OCN LISTING
VI
Prefix range
The prefix 340-555 includes numbers from 3405550000 to 3405559999.
This range is associated with the DIR ASST rate center and was originally assigned to MULTIPLE OCN LISTING.
Numbers in this prefix
20 numbers