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 pr-3274-feature-pt-185857-ip-172-245-193-140.preview.lawmatics.com is not the root of its zone.
Instead, try zone transfer on lawmatics.com .
Instead, try zone transfer on lawmatics.com .