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As part of its full transition away from its old identity X has revealed that the X Corp platform will officially retire the twitter.com domain on November 10 2025. For users who rely on hardware security keys or passkeys (passwordless log-ins tied to the domain) the current credentials are registered under twitter.com. With the domain sunsetting these credentials must be re-enrolled under x.com to avoid being locked out. What to do? If you use a security key or passkey for two-factor authentication (2FA): Go to Settings & Privacy → Security and account access → Security → Two-factor authentication in the X app or website. Choose “Security key” (or passkey) and delete the old entry tied to twitter.com then re-enroll (or add a new key) under the x.com domain. Fast Company After Nov 10 accounts still using a key tied to twitter.com will be locked until they re-enroll or switch to a different 2FA method. What this does/does not affect? This change only affects users with hardware keys or passkeys. Users using authenticator apps SMS codes or other 2FA methods are not required to re-enroll because their methods are not domain-specific in the same way. X clarifies that this isn’t a response to a security breach - it’s a branding and infrastructure shift to retire twitter.com and unify everything under x.com. Why it’s happening? The move marks the closing chapter in the platform’s re-branding: after being acquired by Elon Musk and renamed in 2023 X is now removing one of the last visible links to the Twitter era - its domain. By migrating authentication and other services X prepares for twitter.com to be permanently phased out.
