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 6673dc5cf2ccc68bbf61e6fe1deac89e.95e2c446ebb66aa0137f96134c22b232.a186919a5ab7cdb.comodoca.com is not the root of its zone.
Instead, try zone transfer on comodoca.com .
Instead, try zone transfer on comodoca.com .