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 .