This page is available in

ICANN Acronyms and Terms

ICANN has hundreds of acronyms and terms, which can be confusing. We created this multilingual tool to help explain what these terms mean and facilitate your work within the ICANN community. Search for terms by name or acronym using the search bar, or search by letter. All acronyms and terms are available in Arabic, Chinese, French, Russian, and Spanish.

Do you have feedback on the definitions or the terms? Send us an email to:


  • time to liveTTL

    A numeric value in a resource record that indicates the length of time (in seconds) a resolver can keep the resource record in its cache. If a resolver queries its cache and receives a record whose TTL has elapsed, the resolver requests a new copy of the record from an authoritative name server.