Got a single call at 4:30 today - didn't hear it. They left no message.

Called my cell phone at 10:30 am - no message - Call ID said Newark, NJ

Called at 904, 3/14/2017, left no message...

Call from this number, Newark, NJ.  I answered it and heard a bleep (not a beep) almost like a drop sound.  They asked, 'is John there?' And I replied, 'I'm sorry, you have the wrong phone number' and then listened for a reply, nothing and they didn't hang up, so I quickly did...weird!

Hello is Theodore there?  You have the wrong number. Oh well maybe you can help me I'm calling to ask for money for breast cancer I'm a low life scumbag and I don't care that I intentionally randomly dial numbers ask for someone that probably isn't there and breast cancer research will never see a dime of the money I steal from you.