Who called from 2158103150

I answered and the caller laughs for a good 5 seconds and disconnects.

Caller ID is  CELLPHONE PA
Didn't leave a message.

Caller ID: UNAVAILABLE
Didn't leave a message.

Decided to return the call. "the number you have reached is not in service.Please check the number and dial again. (pause) S-P-O-K.
i'm guessing whoever this is they are very lonely startrek fans ...And since i screen unknown calls i wasn't subjected to "BOB THE LAUGHING BOY" as was Wilfred.

the a.....holes call and hangs up.

Does anyone know who this is?  They Call every few days but never leave a message.  I'd like to find out and report them!