Staging sites which need to interoperate with a third-party are one place I've seen obscured hostnames used. eg, You want to test some front-end changes in con

Staging sites which need to interoperate with a third-party are one place I've seen obscured hostnames used. eg, You want to test some front-end changes in conjunction with changes to the CDN config. If the production site is origin.example.com, the staging site might be at origin-stage-asdgwdse.example.com because you (hope!) the changes don't leak early. IPv4 literal addresses are often inconvenient / not feasible for larger stacks or cloud setups where you don't control the underlying infrastructure.