Prefix overview
Phone numbers in prefix 610-402
This page covers the 610-402 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
610-402
RATE CENTER
ALLENTOWN
CARRIER
CTSI, INC. - PA
PA
Prefix range
The prefix 610-402 includes numbers from 6104020000 to 6104029999.
This range is associated with the ALLENTOWN rate center and was originally assigned to CTSI, INC. - PA.
Numbers in this prefix
20 numbers