Called at 8:36pm. Diverted by a service I subscribe to that intercepts robo-dialed calls (rhymes with SoNoHobo). I called back (*67) and got "Please press 2 if you’d like your number removed from our list. Thank you."  Of course I did not; I had not allowed my number to be seen/recorded by them anyway.

No identification of the company, a name that is not associated with the number in a Google search... Fakes that indicate dishonesty.

Called with no name on caller id.  Did not answer and they did not leave a voice message.   This usually indicates a low life scammer of some sort or a robo dialer using a masked number to generate a valid call list that they can sell to other scammers.

First-time caller, 7:15pm, June 1, 2017. Caller ID read "Mandarin"  Left no message, but when I called back, a very American-accented message said that if I wanted to be removed from the list, press "1."  Huh.