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 _5b420a5c34332a6e20a8cb51f2ee36b7.avalesant.ivcert.net is not the root of its zone.
Instead, try zone transfer on djqtsrsxkq.acm-validations.aws .
Instead, try zone transfer on djqtsrsxkq.acm-validations.aws .