I use TrueCaller app, and it has been displayed in the caller ID as "Angela R. Hadaller"

Rude caller "mike" asking for "business owner"  when asked, what is this regarding he replied "I'm not telling you anything, I will only talk to the business owner who I am asking for..." Well, "Mike" , if you really wanted to reach the business owner and it was for legit business purposes, you'd ask for me by name and have legit business to discuss. So, "Mike" is now "Blocked Mike"

This number keeps calling our office and when I answer the phone they hang up. I have called them back and left 2 messages to remove our number from their call list but they continue to call.

Received at least 7-8 missed calls from this number, no messages. Called back, but says number disconnected. Answered one time and a guy asked for the business owner. When asked who is calling, he hung up. Continued calling daily for several days so I blocked him. He then began calling from other numbers. The calls continue.

After reading other comments, the common denominator seems to be he targets business owners for his scam.