No content to the robo-call

No one on the line.  When I phoned back it was a number that is not in service.

Same as everyone else.   It beeps, and then hangs up after 10 seconds.

Blocked.  :)  Thanks Ooma phone service.  And 800 Notes for confirming its not anyone important.  :)

Called me twice today, an hour and a half apart. I called back but the phone number is not in service. No messages were left by caller.

7 calls from this number in 2 1/2 days!  These unwanted calls are harassment in my opinion!  I want them stopped ASAP!!!