blk-46-31-48-0.as51514.net 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 blk-46-31-48-0.as51514.net is not the root of its zone.
Instead, try zone transfer on as51514.net .