5C66C8E7D8B94641C5DA1DCE8EFE0DDC.8D0041FC74604A43D1ACBED15726B7F4.660876799.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 5C66C8E7D8B94641C5DA1DCE8EFE0DDC.8D0041FC74604A43D1ACBED15726B7F4.660876799.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .