I wrote:
...
HOWEVER, two additional forms exist to repesent "IPv4 compatible" and
"IPv4 mapped" address formats (these have different purposes in the IPv6
transition scheme but that's all outside the scope of this message):
::138.236.128.18
and
::ffff:138.236.128.18
In these two forms, the four IP style decimal octets represent the last
two sets in an IPv6 native style address. The above two would thus be
exactly equivalent to the respective addresses:
::8aec:8a12
and
::ffff:8aec:8a12
...
Since 128 decimal = 80 hex, those should of course be:
::8aec:8012
and
::ffff:8aec:8012
and ditto for the fully written out forms. My apologies to anyone
confused by my previous post.
Philip Guenther