What is Luna Lovegood's official fan phone number?

Luna Lovegood is a fictional book character, therefore does not have an official fan phone number.

However, in the books, she would correspond through messages sent via owl, or maybe through the floo network. Next time you go by Diagon Alley, be sure to keep an eye out for some floo powder. If you find some, you may just luck out and reach her. ;-)