9C28EFED905D385E631A66DA8AB9868B.A90BE82E7AACE45992A3DDEBA00D5CB7.t0609734001740464931.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 9C28EFED905D385E631A66DA8AB9868B.A90BE82E7AACE45992A3DDEBA00D5CB7.t0609734001740464931.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .