IPv6 address
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... The IETF had begun the process of standardizing two different address
formats for IPv6 addresses AAAA [RFC1886] and A6 [RFC2874 ...
... This document also discusses issues relating to the usage of Binary
Labels [RFC2673] to support the reverse mapping of IPv6 addresses.
This document is based on extensive technical discussion ...
...
The issue of the root of reverse IPv6 address map is outside the
scope of this document and is covered in a different document
[RFC3152 ...
...
The hexadecimal text representation of IPv6 addresses appears to be
capable of expressing all of the delegation schemes that we expect to
...
... Crawford, M. and C. Huitema, "DNS Extensions to Support IPv6 Address Aggregation and Renumbering", RFC 2874exp, July 2000. ...