RFC 3026 (rfc3026) - Page 2 of 6

Liaison to IETF/ISOC on ENUM

RFC 3026              Liaison to IETF/ISOC on ENUM          January 2001


   In order to advance a common terminology for the purpose of this
   liaison, we have defined the zones of a domain name as follows.

   Using an example, domain name "1.5.1.5.0.2.0.4.1.3.3.e164.arpa" (as
   in RFC 2916) is segmented into zones as follow:

      E164.arpa - domain zone

      3.3. - country code zone (1, 2, or 3 digits dependent on CC)

      1.5.1.5.0.2.0.4.1. - national zone

   The first understandings to be conveyed are those regarding the
   responsibilities for administration of the various zones within the
   "e164.arpa" domain:

   o  The domain zone administration was agreed to be outside the scope
      of this meeting and WP1/2.

   o  For all E.164 Country Code Zone resources (Country Codes and
      Identification Codes), the ITU has the responsibility to provide
      assignment information to DNS administrators, for performing the
      administrative function.  The ITU will ensure that each Member
      State has authorized the inclusion of their Country Code
      information for input to the DNS.  For resources that are spare or
      designated as test codes there will normally be no entry in the
      DNS.  However, the ITU will provide spare code lists to DNS
      administrators for purposes of clarification.  The entity to which
      E.164 test codes have been assigned will be responsible for
      providing any appropriate assignment information to DNS
      administrators.

   o  The administration of National Zone numbering information is
      determined by the type of Country Code resource that a National
      Zone is behind:

      *  The national zone, for geographic resources, is a national
         matter and is, therefore, administered by the ITU Member
         State(s) to which the country code is assigned.  In an
         integrated numbering plan, e.g., CC "1", each Country within
         the plan may administer their portion of the resource in a
         different manner.

      *  For national zone resources behind the Country Codes assigned
         to and shared by Networks, the entity to which the resource is
         assigned provides the E.164 assignment information, to DNS
         administrators for performing the administrative function.




Blane                        Informational