Prefix overview
Phone numbers in prefix 331-551
This page covers the 331-551 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
331-551
RATE CENTER
LOMBARD
CARRIER
NEW CINGULAR WIRELESS PCS, LLC - IL
IL
Prefix range
The prefix 331-551 includes numbers from 3315510000 to 3315519999.
This range is associated with the LOMBARD rate center and was originally assigned to NEW CINGULAR WIRELESS PCS, LLC - IL.
Numbers in this prefix
20 numbers