X to Retire Twitter.com Domain for Good

X/Twitter is urging users who set up two-factor authentication with a security key to make some changes, as it’s planning to retire the twitter.com domain for good. The company’s Safety account posted yesterday that the change only impacts X accounts requiring Yubikeys and passkeys for login, and affected users will need to re-enroll their key before November 10 to retain access to the platform.

“By November 10, we’re asking all accounts that use a security key as their two factor authentication (2FA) method to re-enroll their key to continue accessing X. (…) Security keys enrolled as a 2FA method are currently tied to the twitter[.]com domain. Re-enrolling your security key will associate them with x[.]com, allowing us to retire the Twitter domain,” the company explained.

To clarify: this change is not related to any security concern, and only impacts Yubikeys and passkeys – not other 2FA methods (such as authenticator apps). Security keys enrolled as a 2FA method are currently tied to the twitter[.]com domain. Re-enrolling your security key will… https://t.co/PlXOTnNXPM

— Safety (@Safety) October 26, 2025

While Twitter underwent numerous tumultuous changes throughout its transition to X, the company was officially acquired by xAI, Elon Musk’s AI startup, back in March 2025. However, the social network formally adopted x.com for all of its core systems back in May 2024, and twitter.com currently redirects to x.com.

Despite the company name and URL changes, it’s safe to say that a lot of X users are still calling the platform “Twitter.” You know a brand really had its breakthrough when it became a noun or a verb, but we may never get a proper replacement for “tweet.”