mail.64.63.187.in-addr.arpa 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 mail.64.63.187.in-addr.arpa is not the root of its zone.
Instead, try zone transfer on 64.63.187.in-addr.arpa .