NPA-NXX - 403-521

This is the 403-521 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. 403
3. 403-521

The 403-521 subcode mainly covers Calgary in Division No. 6 county. But other numbers maybe included as well.

We have a database of information derived from the public phone records of Alberta state. Many of the numbers in this subcode are Regular Landline registered to Telus. We hear they employ a large number of people in the Alberta office.
Recently there have been an increase in reported calls, we've had over 1311022 comments across our systems for the 403-521 subcode.