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 86-46-182-68-dynamic.agg3.nas.cld-dbn.eircom.net is not the root of its zone.
Instead, try zone transfer on cld-dbn.eircom.net .
Instead, try zone transfer on cld-dbn.eircom.net .