Can you tell your distro? And I haven't done BIND thing on Debian based distro, on RH based, go to
/var/named/chroot/var/named
In your (reverse) zone file, there maybe entry like this
Code:
250 IN PTR ns2.kanallokal.se.
Just edit the domain and you'll be done, don't forget to restart your named after you make change.
You can find what is name of zone file in your main named.conf configuration file placed in
/var/named/chroot/etc/ or it maybe symlinked at
/etc/named.conf