Who called from 4182100209

Called me on my cell phone. He said that he knows he did know me but..... And i stop listen at him !

Also call on my phone about 5x but never talk when I answers the calls....
I stop answering..

This week, my collegue received 3-4 call from this number on a brand new cell phone that only 2 persons have the number..

When you call back.. no answers..

Look like spam.. Call on 2 Iphone..