Called the number back and found out it's American Heart Association. Spoke with Lindsey. Told her I get several calls from them every day, and asked her to please remove my number from their calling list. She said she would, let's wait and see. Crossing my fingers :-)
Two calls in two days.
Blocked the number immediately after the first call.
They tried again today but were blocked by my phone system.
Thanks to all posters for the information.
I knew it!I never actually answer phone calls unless I know the number for sure. If it's important enough, they'll leave a message.
This is actually one of several mystery phone calls we've been receiving from Texas.