Prefix overview
Phone numbers in prefix 640-256
This page covers the 640-256 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
640-256
RATE CENTER
PEMBERTON
CARRIER
ONVOY, LLC - NJ
NJ
Prefix range
The prefix 640-256 includes numbers from 6402560000 to 6402569999.
This range is associated with the PEMBERTON rate center and was originally assigned to ONVOY, LLC - NJ.
Numbers in this prefix
20 numbers