Who called from 2158450684

Got a call. No message left.

Keeps calling my sons phone even though phone is on do not call list.
Reporting it !

Called twice--first time with a number that ended with 54.  I didn't pick up the first time since it's not in my contacts.  But the second time--with 215-845-0684--I picked up because I was expecting a call from the Philly area.  I said hello thrice and there was only silence and after the third hello, they hung up!!!

Getting calls from this number days on end with no response after I take the call or let it go to VM.

This number called me and did not leave a voicemail. Another site said it may be someone calling for the Bernie Sanders campaign.