0-0-3.11.edge.rtn.m.OML.RU 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 0-0-3.11.edge.rtn.m.OML.RU is not the root of its zone.
Instead, try zone transfer on OML.RU .