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 2607.f0d0.1e04.0074.0000.0000.0000.0004-ip6.static.sl-reverse.com is not the root of its zone.
Instead, try zone transfer on sl-reverse.com .
Instead, try zone transfer on sl-reverse.com .