37-128-174-109.nunsys.com 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 37-128-174-109.nunsys.com is not the root of its zone.
Instead, try zone transfer on nunsys.com .