Who called from 2135421865

Called many times in the past few days. Hang up on the second ring, never leave a message.

Calls and then hangs up when you answer.

caller ID says NATAYA.  Heavily accented man leaves threatening, rambling message that wishes us luck if we do not respond.  Creepy

called me twice early in the morning

I think this number may be some sort of skype router number as I have caller ID and therefore didn't answer the phone when this number called as I didn't recognize either the name or the number.  I was then called on skype on my computer and the caller, someone I'm good friends with, said they JUST tried to call my landline on skype and I didn't answer.  

I hope this helps. Skype works really well for our family, but it does come up differently on the caller ID.