Prefix overview
Phone numbers in prefix 240-257
This page covers the 240-257 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
240-257
RATE CENTER
NANJEMOY
CARRIER
TELEPORT COMMUNICATIONS AMERICA, LLC - DC
MD
Prefix range
The prefix 240-257 includes numbers from 2402570000 to 2402579999.
This range is associated with the NANJEMOY rate center and was originally assigned to TELEPORT COMMUNICATIONS AMERICA, LLC - DC.
Numbers in this prefix
20 numbers