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 8PQFNF2GB0ALNJB1LN85ML218US73QBG.ecom.net.do is not the root of its zone.
Instead, try zone transfer on net.do .
Instead, try zone transfer on net.do .