.ss is the designated country code top-level domain (ccTLD) for South Sudan in the Domain Name System of the Internet. It is derived from the ISO 3166-1 alpha-2 code for South Sudan, which is SS. According to CIO East Africa, the TLD was allocated on 10 August 2011 following the country's declaration of independence from Sudan. The TLD was registered on 31 August 2011; , it is not in the DNS root zone and thus not operational.
Before .ss was successfully registered, the country's Undersecretary for Telecommunications had initially been concerned about the ccTLD request's possible rejection due to SS also being an abbreviation for Schutzstaffel, the paramilitary force of Nazi Germany.
Before the independence of South Sudan, the applicable domain was .sd, Sudan's top-level Internet domain.