Internet Assigned Numbers Authority Address Literal Tags Created 2007-11-14 Last Updated 2025-05-02 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registry Included Below • Address Literal Tags Address Literal Tags Reference [RFC-ietf-emailcore-rfc5321bis-43] Note Moved to [IANA registry smtp] per [RFC-ietf-emailcore-rfc5321bis-43]. Licensing Terms