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 167.163.128.164.static.wline.lns.ent.cust.swisscom.ch is not the root of its zone.
Instead, try zone transfer on ent.cust.swisscom.ch .
Instead, try zone transfer on ent.cust.swisscom.ch .