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.

ICANN Acronyms and Terms

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In addition to English, translated versions of acronyms and terms are also available in Arabic, Chinese, French, Russian, and Spanish. Links for each language are located in the top right of the page.
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validating resolver

A resolver that uses Domain Name System Security Extensions (DNSSEC) technology to verify the cryptographic signatures for data it receives from Domain Name System servers.


An Internationalized Domain Name that can be registered in different ways due to variations in the spelling of words in a given language. For example, when registering a Chinese domain name, two versions of a character might exist in simplified and traditional Chinese or 名称 (Míngchēng, or name) and 名稱 (Míngchēng, or name) may be considered variants in Chinese.

variant character

This term is no longer used. See Internationalized Domain Name variant code points.

variant top-level domains(variant TLDs)

Top-level domain strings resulting from the substitution of one or more characters in a string with variant characters from an Internationalized Domain Name table.