Who called from 9257082096

I am getting recurrent calls from this number. No one appears to be on the line. No message left

Called me on December 8 2016.
Suspicious number called me left no message. Caller ID is "Wireless Caller".

7 calls in a 24 hour period. No one there when I answer. Now blocked.

Same thing. Call me, I pick up, nobody there. Blocked.

This number says it is from Leonard Freeman.