caller ID just reads "Out of Area" - love how the robo call says "This is your final notice. Press 1 now to be connected to a live operator and lower your interest rate."
"final notice" - yeah yeah I wish - they still call 3-4 times per day, lol
Consider yourself lucky. If you really had annoyed that scumbag, he would have used YOUR telephone number as his Caller ID for the next few weeks (then you'd get lots of angry calls from people he called asking why you're calling them and please stop your calls)!