Prefix overview
Phone numbers in prefix 312-423
This page covers the 312-423 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
312-423
RATE CENTER
CHICGOZN01
CARRIER
LEVEL 3 COMMUNICATIONS, LLC - IL
IL
Prefix range
The prefix 312-423 includes numbers from 3124230000 to 3124239999.
This range is associated with the CHICGOZN01 rate center and was originally assigned to LEVEL 3 COMMUNICATIONS, LLC - IL.
Numbers in this prefix
20 numbers