6 years after I got my current number, and I'll still occasionally get calls for the woman who had it before me. Including: calls about her children's doctor appointments, calls asking if her home at [same address each call] is for sale, calls about the Nurse positions she applied for, and more. I know her name, address, job, and could have known her kids names if I remembered. I basically know her life at this point. I think she might keep accidentally giving out her old phone number.
One guy called absolutely pissed that he got Aids from the woman he was trying to call, but that could be a different person or wrong number because he never said their name. When he realized I wasn't the woman he was calling, he kept trying warning me about said woman but I kept telling him "WRONG NUMBER!"