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 ef0c52233101b260f979da0c49215395.d1339c7c83975e2c2ec12209b704eb0d.e68ff056c51e7770f1.comodoca.com is not the root of its zone.
Instead, try zone transfer on comodoca.com .
Instead, try zone transfer on comodoca.com .