Call from this number-no voicemail.

This number has been calling and they finally left a message.  The company is trying to sell software to help public companies file SEC documents (10-Q, 10-K).

got a call today - no voicemail

Got a  call 5 minutes ago from this number as well...I stupidly answered on the 2nd ring and it immediately hung up.

Got this one yesterday.  Caller ID showed "Mobile Media."  I've gotten so many bogus calls lately that I've forgotten what my response was to this one.  Usually I either wait and see if they hang up when my voicemail picks up, or else I pick up the phone about and inch from the receiver and drop it back down.  If I'm really angry about the interruption, I use a few choice words.