All three-letter .si domains now registered, tracking tool shows
in plain words
Someone built a free tool that tracks every possible three-letter domain name ending in .si, Slovenia's country domain. It found that all 17,576 combinations are now taken, with the last one registered on October 9. The tool shows investors bought up these short domains because they are cheap to renew compared to similar .ai domains.
Full summary
A newly built analytics tool tracking three-letter domain name A readable internet name made of labels separated by dots. Full definition of domain name under Slovenia's .si country code shows that every possible combination has now been registered. There are 17,576 such three-letter combinations in total, and the final one to be claimed was tmc.si, registered on October 9, 2026. Just weeks earlier, in late September, a partial check of the namespace The set of all names in one naming system, such as the DNS. Full definition of namespace found thousands of these domains still available.
The tool presents the data through bar charts and donut charts, covering activity in recent weeks as well as historical trends dating back to 1992, when ijs.si became the first three-letter .si domain registered. Its creator says domain investors have largely driven the sell-out, since .si domains cost roughly 10 to 11 dollars and offer better return potential than comparable three-letter .ai domains, which carry much higher renewal Paying to extend a domain registration for more time. Full definition of renewal fees.
The tool also highlights which registrar A company that registers domain names for customers with the registry. Full definition of registrar host the most three-letter .si domains, with Dynadot A US domain name registrar, accredited by ICANN, that also runs its own marketplace for buying and selling registered and expiring domains. Full definition of Dynadot currently the most popular, and which marketplace lists the most of these domains for sale, led by Spaceship A US company accredited by ICANN as a domain registrar, which Namecheap describes as part of the "Namecheap family". Full definition of Spaceship. The creator notes that these registrar and marketplace classifications are based on observed DNS Domain Name System The internet's directory that links domain names to computer addresses. Full definition of DNS infrastructure rather than verified ownership or sales activity. Data updates are planned on a weekly basis going forward.