8135aef2751be764f12dacf5ef2e35e8.0400e1e63e7bdda504ddd26a90cdfbbf.655635572.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 8135aef2751be764f12dacf5ef2e35e8.0400e1e63e7bdda504ddd26a90cdfbbf.655635572.sectigo.com is not the root of its zone.
Instead, try zone transfer on sectigo.com .