This is what it said on the old character biography section that is no longer there.

"Bart Simpson’s prank phone calls for Amanda Huggenkiss, Mary Mebarney, Ivana Tinkle, etc. do little to soothe his nerves. This hasn’t prevented him from developing a devoted group of regulars, led by Barney Gumble and Homer Simpson, with whom he’s always happy to pass the time, provided they’re buying the beer."

When did this prank call air? Was it in the comic books?