Who called from 9082798800

I picked up the phone from this number, but only heard some background noise and they hung up without saying anything

called lots of operations talking in the back ground, but noone spoke

Not sure who it is, but they never leave a message to my cell phone. I hardly ever use it, but when I check messages, they are always there.

Got many calls from 908-279-8800  and 888-217-5736; the same company.  They say it is  U.S. Directory.  
I asked them to get me off of their list; they said if they do, they will remove my business name from Online directories.  I am sure many businesses fall for that and open their wallet to give them their credit card.    Where is a good cop when you need one?

Started receiving calls within 30 minutes of adding business listing to Manta. They have called repeatedly for 30 minutes now.
Oh boy... thank goodness my phone has an automatic reject feature!