.za is the official country code top-level domain (ccTLD) of South Africa. The .za domain name ending is an abbreviation for Zuid-Afrika, which is the Dutch name for South Africa. The abbreviation ZA is used instead of SA because the domain .sa doesnt seem to be used by any other country, and the alphabet is irrelevant - whats more important is the ISO country code. Anyone can register a .za extension, whether they are an organization, business, or individual, and the domain owner doesnt have to be in South Africa.