5x16x177x190.static-business.spb.ertelecom.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 5x16x177x190.static-business.spb.ertelecom.ru is not the root of its zone.
Instead, try zone transfer on spb.ertelecom.ru .