Well I actually called this number after it called me, it left no message when it called me but I called back (I take these risks) and a weird beeping noise occurred. Then I heard growling, I stayed on the line and said "um hello?" And the robot voice said "hey(scratchy) welcome to Freddy fazbears pizza, (loud beeping noise) we are closed for today, call back tomorrow, by-GO TO HELL WITH FOXY, then I stayed on the line some more and I heard something moving towards the phone, they said "S-A-V-E T-H-E-M" as then I heard child screams, and I heard "duh dum duh dum duh dum duh dum dum" (singing) and a loud scree noise as they hung up.
I kinda got scared then thought "probably a set up" called again and just heard the beeping noise again. Kinda scary.