Prefix overview
Phone numbers in prefix 240-406
This page covers the 240-406 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
240-406
RATE CENTER
WSNGTNZN10
CARRIER
NEW CINGULAR WIRELESS PCS, LLC - DC
MD
Prefix range
The prefix 240-406 includes numbers from 2404060000 to 2404069999.
This range is associated with the WSNGTNZN10 rate center and was originally assigned to NEW CINGULAR WIRELESS PCS, LLC - DC.
Numbers in this prefix
20 numbers