Got a call. Answered and no one said anything.

Received a cold-call from this number, its a sales pitch for some kind of 'Sharepoint management solution'
The sales guy even Pinocchio'd about a coworker referral and only offered vaguities as to how they got my number.
I informed 'Derek' that if he should be calling us, he'd already have the right number, and suggested that he copulate with himself.

Well said! I've often been tempted to say the same thing.

I received a call from 201-793-1111 directly to my voicemail.   My phone never rang and no message was left.  Is this how they get people's and company's names?

dittos