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 241.49-14-84.ripe.coltfrance.com is not the root of its zone.
Instead, try zone transfer on 49-14-84.ripe.coltfrance.com .
Instead, try zone transfer on 49-14-84.ripe.coltfrance.com .