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 .