Username Rules for Brand Names & Trademarks
Trademarked company names and brand identifiers that platforms protect to prevent impersonation and trademark infringement.
Why These Usernames Are Reserved
Brand name usernames create legal liability. If @nike appears on your platform selling counterfeit shoes, you are now part of a trademark dispute. Major platforms learned this early — Twitter, Instagram, and Facebook all reserve Fortune 500 company names, major tech brands, and actively registered trademarks. The alternative is endless DMCA takedowns and legal letters.
Common Examples
Test This with Your Own Username
Powered by username.dev
API Enforcement
Check usernames in this category programmatically:
Related Pages
Username Rules
Browse all rule categories
Reserved Usernames
Overview of reserved usernames
Username Rules for Celebrities & Public Figures
Names of famous individuals, influencers, politicians, and public personalities that require identity verification.
Username Rules for Government & Official Entities
Government agencies, law enforcement, regulatory bodies, and official institutional identifiers.