They are reserved by ICANN, however there are a few around. x.com is Paypal, q.com is owned by Centurylink and z.com is owned by Nissan (although doesn't resolv

They are reserved by ICANN, however there are a few around. x.com is Paypal, q.com is owned by Centurylink and z.com is owned by Nissan (although doesn't resolve right now). You could theoretically purchase q, x or z.com from the current owners, otherwise it's impossible to register them. I guess theoretically a very well funded company could try and bribe ICANN to release one to them, but that seems exceptionally unlikely. http://en.wikipedia.org/wiki/Single-letter_second-level_domain http://en.wikipedia.org/wiki/Single-letter_second-level_doma...