Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain AF2B8B4E-B149-11EF-9908-B38E636D8CD0._domainkey.ntc.net.pk is not the root of its zone.
Instead, try zone transfer on ntc.net.pk .
Instead, try zone transfer on ntc.net.pk .