Same here (xennial), it confuses lot of telemarketers out of their script, if someone start talking with me I ask them "do I have contract with you?", if the answer is "no", I hang up, since it's clearly someone selling something.

related call scene from Fight Club how Tyler properly answers the phone (not answering but calling back and his first response is "Who is this?"):

https://youtu.be/tlw677Une_Q?si=xj3Sce9RdQ-_UfZP&t=85