776a877fa6adbbab5ad07638dfd8a31d.478cef29bb55cb43f2a3eff628549a34.115036.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 776a877fa6adbbab5ad07638dfd8a31d.478cef29bb55cb43f2a3eff628549a34.115036.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .