Internet Assigned Numbers Authority Caller-ID Numbering Plans Created 2004-10-05 Last Updated 2005-01-21 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registry included below * Caller-ID Numbering Plans Tokens Caller-ID Numbering Plans Tokens Registration Procedure(s) Standards Action Reference [RFC3939] Available Formats [IMG] CSV Token Description Reference unknown The number's semantics are unknown. This value is the default in the absence of this parameter. [RFC3939] local The number only has meaning within the domain of the sending system identified by the [RFC2822] From field of the message. [RFC3939] e164 The number's semantics are described in [ITU-T Recommendation E.164 (1997), "The international public telecommunication [RFC3939] numbering plan"]. Licensing Terms