c6a67794e9240b8aa72d7acb656590cb.3529fdf2edd8455f0457956d3cfd3d5f.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 c6a67794e9240b8aa72d7acb656590cb.3529fdf2edd8455f0457956d3cfd3d5f.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .