Hello,
I have created a reverse lookup zone for 2001:bc8:3f83:0200::/56, when I add a PTR record for 2001:bc8:3f83:0200::200:99, the MMC snap-in adds a zero group in my address and adds a record for 2001:bc8:3f83:0200:0000:0000:0000:200:99.
Zone creation :
http://imageshack.com/a/img673/4018/JFf7BX.jpg
PTR creation :
http://imageshack.com/a/img538/9239/bZqaQl.jpg
Result :
a PTR with address 2001:bc8:3f83:0200:0000:0000:0000:200:99 :
http://imageshack.com/a/img673/8793/3EcxOW.jpg
(Sorry for the image links, the forum would not allow me to post images...)