aa6.haygroup-dunajska31.ba.cust.gts.sk IXFR zone transfer

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 aa6.haygroup-dunajska31.ba.cust.gts.sk is not the root of its zone.
Instead, try zone transfer on cust.gts.sk .