![]() Registries and Registrars are encouraged to only use US-ASCII encoding and character repertoire for WHOIS (port-43) output. Updated Date (if the domain name has not been updated since it was created)įor example, a query for a domain name without Name Servers (and no DS or DNSKEY records) can generate any of the following two outputs:Īs described in RFC 3912, the WHOIS protocol (port-43) has not been internationalized. In responses to domain name object queries, the following fields are considered optional and should be treated as described in clarification 1: If data exist for a given optional field, the key and the value with the data MUST be shown. For optional fields where no data exists in a contracted party's Registration System (SRS), the contracted party MUST implement either of: 1) the key (i.e., the string to the left of the colon) MUST be shown with no information in the value section (i.e., right-hand side of the colon) of the field or 2) no field MUST be shown. The following clarifications apply to both Registry and Registrar Registration Data Directory Services specifications:įor each type of object query (domain name, registrar, name server), this advisory identifies some fields as optional.The terms "MAY", "MUST", "MUST NOT", "REQUIRED", "SHOULD NOT" and "SHOULD" are used to indicate the requirement level in accordance with RFC 2119, which is available at. Interested users are encouraged to consider the clarifications below when developing parsers for WHOIS output. ![]() One of the objectives of these clarifications is to retain the ability to easily parse the output. The clarifications in Section I are applicable to both registries and registrars Section II applicable only to registries and Section III applicable only to registrars. This Advisory is intended to provide clarification for registries and registrars regarding their WHOIS (port 43) and Web-based Directory Service (jointly called Whois in this document) specifications required for compliance with the Registry Agreement and Registrar Accreditation Agreement, respectively. Please note that the English language version of all translated content and documents are the official versions and that translations in other languages are for informational purposes only. ![]()
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