Not an apex domain
The domain 216-164-208-147.s146.c3-0.tlg-cbr6.atw-tlg.pa.cable.rcncustomer.com is not the root of its zone.
Instead, try zone transfer on atw-tlg.pa.cable.rcncustomer.com .
Instead, try zone transfer on atw-tlg.pa.cable.rcncustomer.com .