.za history of usage: "ZAR" serves as the ISO 4217 currency code for the South African rand. The international vehicle code for South Africa has been "ZA" since 1936. Additionally, South African aircraft registration prefixes also start with "Z". .ZA has a Second Level Domain (SLD) Structure. ZADNA removed a number of domains from the .za zone on the 7 August 2009 Currently around 29.39% of the .za internet is served via secured HTTPS protocol, with the Let's Encrypt Authority X3 being the most popular SSL certificate. Apache is the most popular web server, serving 66.56% of the .za domains, followed
International vehicle registration code system is used for vehicles belonging to the diplomats of foreign countries with license plate from the host country. That system is host country-specific and varies largely from country to country. For example TR on a diplomatic car in the USA indicates Italian, not Turkish. Such markings in Norway are indicated with numbers only, again different from international standards (e.g. 90 means Slovakian. International vehicle registration code The country in which a motor vehicle's vehicle registration plate was issued may be indicated by an international licence plate country code, formerly known as an International Registration Letter or International Circulation Mark.