Prefix overview
Phone numbers in prefix 312-388
This page covers the 312-388 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
312-388
RATE CENTER
CHICGOZN01
CARRIER
T-MOBILE USA, INC.
IL
Prefix range
The prefix 312-388 includes numbers from 3123880000 to 3123889999.
This range is associated with the CHICGOZN01 rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers