> it doesn't (publicly) "look good" when we're living in a world that lacks (or has greatly limited) v4 space. What this says is: "NTT has a /16 they're foolin

> it doesn't (publicly) "look good" when we're living in a world that lacks (or has greatly limited) v4 space. What this says is: "NTT has a /16 they're fooling around with publicly", even though it (presumably) is harmless. NTT is one of the larger Tier 1 ISPs. Having some unused IPv4 address space is a good thing when you're such a huge network operator -- it means you can dedicate some globally-routed IPs for testing/prototyping/renumbering and also have some extra IP space for new devices. Given what happens to ISPs that run out of IPs, I am frankly glad NTT has enough free IPs to fool around with nyan cats. If NTT was dragging its feet on IPv6, then yeah, such a stunt might look awkward, but NTT hasn't -- they've been on the forefront of IPv6 for a while. AFAICT they were the first to offer commercial IPv6 connectivity and their global IP network has been native IPv4/IPv6 since 2004, and anecdotally I see their routers in my IPv6 traceroutes all the time.