A título de curiosidade:
Shortest URLs on the Internet Some of them do indeed load:
http://ai is a nice retro landing page for “Offshore Information Services”, who seem to maintain the .ai TLD
http://pn serves an “it works” page;
https://pn serves “hello world” (with an invalid certificate)
http://uz serves a HTTP 500;
https://uz serves the Uzbekistan ccTLD’s homepage (with an invalid certificate)
http://мон eventually serves a blank page, but does also serve a favicon;
https://мон eventually serves a default Apache landing page (with an invalid certificate