Prefix overview
Phone numbers in prefix 331-289
This page covers the 331-289 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
331-289
RATE CENTER
HINSDALE
CARRIER
T-MOBILE USA, INC.
IL
Prefix range
The prefix 331-289 includes numbers from 3312890000 to 3312899999.
This range is associated with the HINSDALE rate center and was originally assigned to T-MOBILE USA, INC..
Numbers in this prefix
20 numbers