I have a couple. One was a call my mom answered while I was in the next room. As soon as the phone rang, I knew it was my mother’s best friend, calling to say that her mother had just died. I had no way of knowing that, but I was right, and it freaked me out.
Another was supposedly a wrong number, when I was a teenager. The guy apologized for mis-dialing, then started chatting with me. Being a friendly sort, I chatted back… until he started asking me what I was wearing, and if I’d take it off for him. I hung up on him, and he proceeded to harass me by phone for the next three months. It was awful. I still have no idea who he was, since it was long before the days of caller ID.