How can I abort a telnet connection attempt?

Question

Suppose I execute the following in command prompt:

telnet XXX.XXX.XXX.XXX 80

half a second later, I realize it would never connect (for whatever reason). I want to abort the connection attempt instead of waiting for it to timeout.

Pressing either Ctrl + c, Ctrl + ], Ctrl + q or quit does nothing.

Answer 1

If it's connecting (or failing to connect...), then there is no way to interrupt the process until it times out or close the command prompt and open again.