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 _bbbc4244ae5710812f5c020ac9bbf8c3.radiusi.irax.com is not the root of its zone.
Instead, try zone transfer on chvvfdvqrj.acm-validations.aws .
Instead, try zone transfer on chvvfdvqrj.acm-validations.aws .