te0-2-1-3.rcr51.b034314-0.sjc13.atlas.cogentco.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 te0-2-1-3.rcr51.b034314-0.sjc13.atlas.cogentco.com is not the root of its zone.
Instead, try zone transfer on sjc13.atlas.cogentco.com .