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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.

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  • LDH label

    A label that conforms to the hostname format defined in Request for Comments (RFC) 952, as modified by RFC 1123. LDH labels can consist of ASCII letters, digits, or hyphens. A hyphen must not occupy the first or last position of the label.