|Introduced||7 November 1997|
|TLD type||Country code top-level domain|
|Registry||Bahnhof ST Registry|
|Intended use||Entities connected with São Tomé and Príncipe|
|Actual use||Used in São Tomé and Príncipe, but marketed worldwide for various purposes|
|Structure||Registrations are made directly at the second level|
|Documents||Terms and Conditions|
|Dispute policies||The registry obeys court orders, and judges disputes themselves for a fee|
|Registry website||.ST registry|
Registrations are taken directly at the second level, but some names have been reserved for use in specialized third-level registrations (though not all of these are actually in use at present):[additional citation(s) needed]
- nic.st: Official ST domain registry (older: registry.st)
- gov.st: Government of São Tomé and Príncipe
- saotome.st: Island of São Tomé
- principe.st: Island of Príncipe
- consulado.st: São Tomé and Príncipe consulates
- embaixada.st: São Tomé and Príncipe embassies
- org.st: non-profit organisations
- edu.st: educational institutions
- net.st: network providers/operators, ISPs
- com.st: commercial entities
- mil.st: Armed Forces of São Tomé and Príncipe
The .st domain is being marketed as a general-use domain, with a number of meanings suggested, including the abbreviation of "street", "state", short for "Star Trek" and more. The .st domain is also commonly used to create domain names that spell words ending in st, such as bur.st or ho.st. It is used for URL shortening domains like The Washington Post's wapo.st, and PlayStation's play.st.
The Smalltalk programming language uses the .st extension, and several websites about it use the .st domain.
There is limited usage of .st in Stockholm, Sweden, by smaller businesses and private people. Falck Emergency in Stockholm uses[when?] .st for all their employees in the ambulance service of the Swedish capital Stockholm. Since 2018 the city has its own top level domain, .stockholm.
Australia's Telstra, uses tel.st as a shortcut to its main website. The shortcut is occasionally used for marketing purposes.
Australia Post uses mypo.st as a shortcut to its site when sending SMS alerts.
The U.S. newspaper The Washington Post uses wapo.st (along with wapo.com) as a shortcut redirect to their main URL washingtonpost.com