Trademark Clearinghouse (TMCH)
ICANN's centralized database of validated trademarks. Registered marks get sunrise-period priority on new gTLD launches and trademark-claims warnings during regular registration.
Sunrise
When a new TLD launches (.app, .dev, etc.), TMCH-registered trademark holders get an exclusive registration window before the public launch.
Claims
For 90 days after a TLD’s general availability, anyone trying to register a name matching a TMCH-listed mark sees a warning before they can complete the registration.