For example, the http URL defines names according to the naming authority of a particular server. This does not mean you need to access that server in order to retrieve a representation of that resource. All that is needed is for the resource namespace to be defined such that the client can determine a mechanism for locating the resource. Therefore, it makes sense to only have one URL scheme for phone names. On the contrary.
Phone numbers are a hierarchical structure.
You can tell that by the way they are abbreviated in context. Sorry, but that is completely wrong.