Every extension,
A to Z.
Country codes, new generic extensions, .pk second levels and brand TLDs. Each one has a page with the price, who can register it, transfer rules and FAQs.
.sa is the official internet extension for Saudi Arabia.
.sb is the official internet extension for Solomon Islands.
.sc is the official internet extension for Seychelles.
.sd is the official internet extension for Sudan.
.se is the official internet extension for Sweden.
The .sg extension belongs to Singapore and is managed by SGNIC.
The .sh extension belongs to Saint Helena and is managed by Internet Computer Bureau (Identity Digital).
.si is the official internet extension for Slovenia.
.sj is the official internet extension for Svalbard and Jan Mayen.
The .sk extension belongs to Slovakia and is managed by SK-NIC.
The .sl extension belongs to Sierra Leone and is managed by Sierratel.
.sm is the country code domain of San Marino.
.sn is the country code domain of Senegal.
.so is the official internet extension for Somalia.
.sr is the official internet extension for Suriname.
The .ss extension belongs to South Sudan and is managed by National Communication Authority (South Sudan).
.st is the country code domain of São Tomé and Príncipe.
.su is the country code domain of Soviet Union (legacy).
.sv is the country code domain of El Salvador.
.sx is the country code domain of Sint Maarten.
.sy is the country code domain of Syria.
.sz is the country code domain of Eswatini.