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 188-23-117-216.adsl.highway.telekom.at is not the root of its zone.
Instead, try zone transfer on adsl.highway.telekom.at .
Instead, try zone transfer on adsl.highway.telekom.at .