Prefix overview
Phone numbers in prefix 610-475
This page covers the 610-475 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
610-475
RATE CENTER
PHPHSBZN31
CARRIER
SPOK, INC.
PA
Prefix range
The prefix 610-475 includes numbers from 6104750000 to 6104759999.
This range is associated with the PHPHSBZN31 rate center and was originally assigned to SPOK, INC..
Numbers in this prefix
20 numbers