1. potential confusion with RFC 1918 addresses, including the association of RFC 1918 addresses with "non-routable outside of the local network" and "used with NATs".
2. potential confusion with RFC 3041 "privacy addresses"
Unfortunately English doesn't seem to have many antonyms for "public", but as politically-correct but not misleading alternatives to GUPI/PUPI, IDEA, and "private addresses" I suggest that either "nonpublic addresses" or "limited-access addresses" or perhaps just "limited addresses" would be better.
Politically, calling them private addresses will work best, even if it offends end-to-end purists such as myself.
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