81-187-30-0.ip4.reverse-dns.uk 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 81-187-30-0.ip4.reverse-dns.uk is not the root of its zone.
Instead, try zone transfer on reverse-dns.uk .