Prefix overview
Phone numbers in prefix 630-374
This page covers the 630-374 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
630-374
RATE CENTER
NAPERVILLE
CARRIER
SPOK, INC.
IL
Prefix range
The prefix 630-374 includes numbers from 6303740000 to 6303749999.
This range is associated with the NAPERVILLE rate center and was originally assigned to SPOK, INC..
Numbers in this prefix
20 numbers