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 168-91-180-168.s2214.c3-0.atw-cbr4.atw.pa.cable.rcncustomer.com is not the root of its zone.
Instead, try zone transfer on atw.pa.cable.rcncustomer.com .
Instead, try zone transfer on atw.pa.cable.rcncustomer.com .