56E20A69E2328F2B2786929E8A8026B1.1018EA2AE73FC2CF515AFB39CF0FF310.918649896.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 56E20A69E2328F2B2786929E8A8026B1.1018EA2AE73FC2CF515AFB39CF0FF310.918649896.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .