Prefix overview
Phone numbers in prefix 630-231
This page covers the 630-231 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
630-231
RATE CENTER
W CHICAGO
CARRIER
ILLINOIS BELL TEL CO
IL
Prefix range
The prefix 630-231 includes numbers from 6302310000 to 6302319999.
This range is associated with the W CHICAGO rate center and was originally assigned to ILLINOIS BELL TEL CO.
Numbers in this prefix
20 numbers