Ipv4AddressScope
Ipv4AddressScope =
"this-host"|"loopback"|"link-local"|"private"|"shared"|"benchmarking"|"documentation"|"multicast"|"limited-broadcast"|"reserved"|"global"
Defined in: packages/net-address/src/ipv4/classify-ipv4.ts:57
Which special-purpose block an address falls in.
"global" means none of the blocks below — not that the address is
necessarily routable, since the IANA registry holds further small assignments
this package does not enumerate.