Prefix overview
Phone numbers in prefix 640-254
This page covers the 640-254 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
640-254
RATE CENTER
PLEASANTVL
CARRIER
CALLWORKS CORPORATION
NJ
Prefix range
The prefix 640-254 includes numbers from 6402540000 to 6402549999.
This range is associated with the PLEASANTVL rate center and was originally assigned to CALLWORKS CORPORATION.
Numbers in this prefix
20 numbers