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 ns020-lguosrvn9t45g4ul.l.d-53.info is not the root of its zone.
Instead, try zone transfer on l.d-53.info .
Instead, try zone transfer on l.d-53.info .