NSAP addresses, which essentially are telephone numbers, assume
geographically aggregated addresses at country level (so called,
country code), which is why they don't need large global routing
tables.
The phone network doesn't really operate or 'route' in the same way as the Internet does.
I don't think using it in a comparison here works, at all... I really wish folk would stop trying
to make this equivalency.
(I think LNP actually means the phone carriers are creating a 'must know about 6+b address/path mappings
in a possible future... or even just in the US ~350m endpoints/mappings, but anyways...)