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 e57c39a05f2fc374599b-8214924ecd87b199dd8fc7fbb67da389.r85.cf2.rackcdn.com is not the root of its zone.
Instead, try zone transfer on dscg10.akamai.net .
Instead, try zone transfer on dscg10.akamai.net .