Didn't this used to be owned by PayPal?
From Wikipedia: On July 5, 2017 Elon Musk repurchased the domain name X.com from PayPal.[5][6] On 14 July 2017, Musk announced the "launch of x.com" on Twitter.[7] When the page launch it consisted of a blank white page with one "x" in the top left corner.[8]
[0]: https://twitter.com/jondaily83/status/884689301002362880