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 ip-84-32-131-176.009.ptr.cherryservers.net is not the root of its zone.
Instead, try zone transfer on 009.ptr.cherryservers.net .
Instead, try zone transfer on 009.ptr.cherryservers.net .