44.128.x.x is the testing subnet and consists of 65,536 (2¹⁶) addresses. Much akin to 10.0.0.0/8, 172.16.0.0/12, 169.254.0.0/16 or 192.168.0.0/16, this is an unroutable private IP block. Connectivity to the rest of the network should be given through router gateways much as one would do with Network address translation in any other private IP block.

There is no attribution to that statement, and nothing I could find at AMPR.org

Is this the best way to address devices when doing NAT into a private network? Any issues?

Or are there advantages to requesting assigned numbers?

thanks & 73,

Jim Alles