71163b990bb334ee163f00e824741829.2db3a1dd5b45cd487c3225ddbed87dde.t0861463001722018391.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 71163b990bb334ee163f00e824741829.2db3a1dd5b45cd487c3225ddbed87dde.t0861463001722018391.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .