Received a call at 1:36pm 4/22/17
Hello?
This is Joe from Trip Advisor.com, can you hear me okay?
yes
(auto-disconnect)
DOH!!!  I hope this isn't one of those scams where they capture your "yes" for nefarious uses.
I immediately called back and got a recording:
"Thank you for calling customer service.   Please select from the following options so we can determine how to best assist you.  Including how to enter your phone number into our do not call registry.  To speak to a with an agent, press 1 now.  If you'd like to be placed on our internal do not call registry, press 2.
(pressed 1)
All our agents are currently unavailable, please email any questions to [email protected].  Thank you and have a wonderful day."