How will the e164.arpa domain be organised?
One convenient way of doing this would be to delegate according to the 243 country codes designated by the ITU. It is important to understand, however, that delegation in DNS can occur at any digit or zone domain in DNS terms. For example, within the root e164.arpa, there would be: An NS listing for .1.e164.arpa – representing the country code (1) of the North American Numbering Plan (US, Canada, and several Caribbean countries). An NS listing for .4.4.e164.arpa – representing the country code (44) of the UK. An NS listing for .6.4.e164.arpa – representing the country code (46) of Sweden, An NS listing for .1.8.e164.arpa – representing the country code (81) of Japan, and An NS listing for .8.5.3.e164.arpa – representing the country code (358) of Finland. At the national TN/NS level, further NS delegation [DNAME, CNAME, PTR] can occur to enterprises, TN/NS application service providers, carriers, and even individuals who have DNS servers in their homes.
