3E91A4CEEE83212EAA6EF3DD6C087472.A969857472FB23E322F3F9F1C6EC91DB.923653009.sectigo.com IXFR zone transfer

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 3E91A4CEEE83212EAA6EF3DD6C087472.A969857472FB23E322F3F9F1C6EC91DB.923653009.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .