NPA-NXX - 972-521

This is the 972-521 subcode (NPA-NXX) prefix page. Follow a prefix to find the number you are looking for. We divide our pages up to make them more user friendly to navigate!

1. Area Codes
2. 972
3. 972-521

The 972-521 subcode mainly covers Allen in Collin county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Texas state. Many of the numbers in this subcode are Regular Landline registered to Tw Telecom. We hear they employ a large number of people in the Texas office.
Recently there have been an increase in reported calls, we've had over 782341 comments across our systems for the 972-521 subcode.