I received a call from this number, answered and they asked for my son who is 44 years old and does not live with me.  When I advised the girl calling of that she asked for his phone number and I said it was not available.  I asked who was calling and what was the name of the firm she with, she stated she could only speak with my son.  It all sounded very suspicious and upon doing some research on the number, it appears that it may be a business funding organization.

I do not know, but upon calling back I received a busy.

Same here call and no one talked

Called at 3p, left no message. Getting a lot of recorded sales/phishing messages and hang up calls over the past 3 weeks, may be yet another number as part of those.