how can I check what features do not require license?

Hello,

I have a 6300 pair of nodes in HA, in release S-CZ7.2.0m6.

The command "show features" shows, among others, Routing and ENUM. But in the config mode, in system>license, a "show" does not show them among the features.

Additionally, in entitlements, Routing is enabled.

I suppose reason is that ENUM and Routing do not require license, and Routing requires enablement under entitlements. But how can I confirm that? Is this documented?

Has these features required a license always, or this requirement stopped at some release? I remember in the past having licenses for both of them. when in S-CX6.2.0 for example.