950341D7FA448F9FEC87CDCBDC32D27A.B6AC87A26EC681CF2D209193A90099AE.754460971.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 950341D7FA448F9FEC87CDCBDC32D27A.B6AC87A26EC681CF2D209193A90099AE.754460971.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .