_a38eb6d43cd8f67f7fde8718c3a853c6.spf.dnssmarthost.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 _a38eb6d43cd8f67f7fde8718c3a853c6.spf.dnssmarthost.net is not the root of its zone.
Instead, try zone transfer on spf.dnssmarthost.net .