Who called from 6519625000

I got this too and looked into it, it's the University of St. Thomas in St. Paul.

It is the University of St Thomas alumni looking for a donation.

I got this number on my cell phone I didn't answer it because I didn't recognize it

Got call, didn't answer.  No message. Checked it out.  St. Thomas University looking for donations, no doubt.
It was called Collage of St. Thomas when I went there for two years....long time ago.

How did they get my number???  I graduated over 40 years ago and have had no contact with them since.