It was registered on December 11, 1986, making it one of the earliest ever domain registrations on the Internet.

[4] According to McAfee report "Mapping the Mal Web," .is was evaluated as one of the top 10 most secure TLDs in the world in the years 2007, 2008, 2009, and 2010.

[7][8] In 2014, ISNIC suspended two domains which hosted material produced by the Islamic State, including Khilafah.is.

It was pulled from its .is domain after its publisher did not fulfill the standard procedure of disclosing his address.

[10] In September 2022, ISNIC suspended the .is domain for Kiwi Farms, a controversial internet trolling and harassment forum.