Word of the Day: octothorpe

octothorpe (n)

The name for the telephone keypad symbol #

"It was a slow day at the pet store, and as the birds screamed and the puppies squealed, Sebastion stared at the telephone keypad, hoping that Fatima would call. Pound symbol or octothorpe? Which was correct? In the end, did it matter?"
--Hector Del Rio, Under the Overpass

Someone has been calling me daily on my cell phone and asking, in Spanish, for "Maria." No habla español. How do you say "wrong number" in Spanish? "Numero incorrecto"? All I can think of to say is "no hay banda."