core-103.242.28.0.valueserver.jp 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 core-103.242.28.0.valueserver.jp is not the root of its zone.
Instead, try zone transfer on valueserver.jp .