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 177.146-136-217.adsl-dyn.isp.belgacom.be is not the root of its zone.
Instead, try zone transfer on 146-136-217.adsl-dyn.isp.belgacom.be .
Instead, try zone transfer on 146-136-217.adsl-dyn.isp.belgacom.be .