I answered before I checked this website. It was a computer voice that just said "goodbye". I thought it was funny. Now I know not to answer this call.
Thanks to everyone for posting!
Claimed to be calling for Visa, Mastercard and Discover card. I could hear a whole bunch of foreign accents in the background so I proceeded with my "security check" questions:
I asked where they were calling from, the woman with the foreign accent said "Orlando"
When I asked her to verify the zip code of Orlando Florida she hung up.
Works every time, scammers don't even take the time to back up their stories. When I tried to call them back, it went to a "if you'd like to be put on the do not call list" recording.