66-44-56-19.s6131.c3-0.grg-cbr1.lnh-grg.md.cable.rcncustomer.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 66-44-56-19.s6131.c3-0.grg-cbr1.lnh-grg.md.cable.rcncustomer.com is not the root of its zone.
Instead, try zone transfer on lnh-grg.md.cable.rcncustomer.com .