Comment by zamadatix

The command output has the answer, it's a CNAME to whatever random AWS instance happens to be up and running. They probably let the instances autoscale to load and don't guarantee they'll be around for any amount of time and rather than configure an additional service for heatbeating they just used DNS.

There are caching nameservers that allow you to override the minimum TTL but be aware the device is likely relying on this being immediately up to date and may not work during a change with an extended TTL set.