Who is this?

Who is this?

Who is making this telephone call?; Who is on the other end of this telephone line? Tom (answering the phone): Hello? Fred: Hello. Do you have any fresh turkeys? Tom: Who is this? Fred: Isn't this the Harrison Poultry Shop? Tom: No. Fred: I guess I have the wrong number. Mary (answering the phone): Hello? Sue: Hello, who is this? Mary: Well, who did you want? Sue: I want Grandma. Mary: I'm sorry, I think you have the wrong number.
See also: who