dc-itmo-s3proxy-01.it.itmo.ru 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 dc-itmo-s3proxy-01.it.itmo.ru is not the root of its zone.
Instead, try zone transfer on itmo.ru .