Right after I rec'd call on my home line (which is unlisted) I called back using my cell phone and a recording device stated "this number is no longer in service".

Automated call re: security system. Starts off by saying "This is Pat.....hello, can you hear me? My name is Pat..." Offering free set up and asks, you do own your home, right? Said nope and recording said okay, thank you and it disconnected. Wish they were all that easy lol!

After saying hello there was nothing - Blocked

Scam.

blocked.  Telecom customer service, that's what it claims to be, not what it is.