RFC 2916 (rfc2916) - Page 2 of 10
E
Alternative Format: Original Text Document
RFC 2916 E.164 number and DNS September 2000 should contact the appropriate zone administrator in order to be listed, by examining the SOA resource record associated with the zone, just like in normal DNS operations. Of course, as with other domains, policies for such listings will be controlled on a subdomain basis and may differ in different parts of the world. To find the DNS names for a specific E.164 number, the following procedure is to be followed: 1. See that the E.164 number is written in its full form, including the countrycode IDDD. Example: +46-8-9761234 2. Remove all non-digit characters with the exception of the leading '+'. Example: +4689761234 3. Remove all characters with the exception of the digits. Example: 4689761234 4. Put dots (".") between each digit. Example: 4.6.8.9.7.6.1.2.3.4 5. Reverse the order of the digits. Example: 4.3.2.1.6.7.9.8.6.4 6. Append the string ".e164.arpa" to the end. Example: 4.3.2.1.6.7.9.8.6.4.e164.arpa 2.1 Special note about the '+' The '+' is kept in stage 2 in section 2 to flag that the number which the regular expression is operating on is a E.164 number. Future work will be needed to determine how other numbering plans (such as closed ones) might be identified. It is possible, but not definite, that they would use a similar mechanism as the one described in this document. 3. Fetching URIs given an E.164 number For a record in DNS, the NAPTR record is used for identifying available ways of contacting a specific node identified by that name. Specifically, it can be used for knowing what services exists for a specific domain name, including phone numbers by the use of the e164.arpa domain as described above. The identification is using the NAPTR resource record defined for use in the URN resolution process, but it can be generalized in a way that suits the needs specified in this document. Faltstrom Standards Track
