They called our business - no response when answered.  Called them back.  Phone never rang, although someone answered.  Hung up.  Probably a scam since initially there was no response.

Called my job - asked for the business owner. I said "Sure, what is the call regarding?" Could hear a TON of people talking loudly in the background, but the actual caller didn't say anything and just hung up. Sounds like a scam to me.

they call and never say anything

Solicitor asking for the owner of the company. I said sure no problem and put him on hold for 5 minutes. The idiot eventually hung up! I like to waste their time like they waste my time!

Sound like a good idea! I'm going to do that when they call here again! Thanks. Wasting their time is my new plan ... So, answer and just do nothing, say nothing ...