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 e12dd7e2086065fbe4d4aa458b3c9522.52bd17cfac050e9c52cac67f3611a40b.6699fcaca5ce4.comodoca.com is not the root of its zone.
Instead, try zone transfer on comodoca.com .
Instead, try zone transfer on comodoca.com .