75-241-191-10.dyn.k2telecom.net.br 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 75-241-191-10.dyn.k2telecom.net.br is not the root of its zone.
Instead, try zone transfer on net.br .