Out of interest, I was playing on Uniforum's website and noticed that the domain: za.co.za is available for registration. http://co.za/cgi-bin/whois.sh?Domain=za&Enter=Enter
Your query has generated the following reply:-
Search on za (.co.za)
Match: No Matches
This domain is available for registration. The first correct application
received and processed for this domain should be successful.
I tried registering the domain, but got a reply that the domain za.co.za contains an illegal word.
! You appear to be trying to register the domain "za.co.za"
! which contains an illegal word. Please choose a different name.
! Your upstream ISP should be able to assist you in this regard.
! If not - please contact the co.za support staff.
Why would za be marked as an illegal word? Why can't the domain be registered?