World's most Prized and Shortest Domain Names..

Your fun fact of the day out of 255 million websites and 88.8 million .com active domains there are only 3 single letter domains i.net, x.com (paypal) and x.org host a web site. q.com is redirects to qwest.com.

Active single-letter domains

On December 1, 1993, the Internet Assigned Numbers Authority (IANA) explicitly reserved the remaining single-letter and single-digit domain names.  So there will never be anymore single letter domain.  Unless they decide to auction off the single letter which they stated in 2005 that they might at some point...

Active Two-letter domain names

Two-letter domain names are also reserved but some domains where grandfathered in.  

There are only 108 brands that own the shortest domains on the entire planet. 

Some of them are the following:

3i.com (3i Group), aa.com (American Airlines), ae.com (American Eagle Outfitters),ba.com (British Airways), bn.com (Barnes & Noble), bp.com (British Petroleum), bt.com (British Telecom), ca.com (CA, Inc), db.com (Deutsche Bank), dj.com (Dow Jones & Company), dq.com (Dairy Queen), dq.ca (Dairy Queen), ea.com (Electronic Arts), eb.com (Encyclopedia Britannica), ey.com (Ernst & Young), fb.com (Facebook), ft.com(Financial Times), ge.com (General Electric), gm.com (General Motors), gs.com (Goldman Sachs), ha.com (Heritage Auctions), hp.com (Hewlett-Packard), lg.com (LG Group),ms.com (Morgan Stanley), ni.com (National Instruments), pg.com (Procter & Gamble), sf.net (SourceForge.net), st.com (STMicroelectronics), ti.com (Texas Instruments),ua.com (Under Armour), un.org (United Nations), vk.com (Vkontakte), and wp.com (WordPress.com).

ad.com was auction off in 2009 for $1.4million - and it is now a crappy parked domain that leads to condoms etc..

i worked for ft  meaning france telecom so they are out of luck...  ft.com goes to financial times... having ft.com in a mobile world is even more valuable....

full list here