Prefix overview
Phone numbers in prefix 331-281
This page covers the 331-281 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
331-281
RATE CENTER
NAPERVILLE
CARRIER
ILLINOIS BELL TEL CO
IL
Prefix range
The prefix 331-281 includes numbers from 3312810000 to 3312819999.
This range is associated with the NAPERVILLE rate center and was originally assigned to ILLINOIS BELL TEL CO.
Numbers in this prefix
20 numbers