I hate prank phone calls. I havent gotten one in a long time. About 2 years. The last one was some perverts telling me to stick my hands down my pants and all kinds of sexual shit. I would hang up and they would call right back. I would have fucked with them but they blocked their number.

Your prankster doesnt sound to smart seeing as he didnt block his number. Do a reverse address search using his phone number and get junk mail sent to his house.