REGISTERED BUT NOT ROUTED: WHAT A GLOBAL AUDIT OF IPV6 SAYS ABOUT DEPLOYMENT

Summary from the TLDR IT newsletter

Researchers conducted a global audit comparing IPv6 registration records from Regional Internet Registries against live BGP routing tables and the IPv6 Hitlist project. They found that while 92.5 percent of registered IPv6 netblocks appear in live routing, only 79.4 percent of the underlying address space does, revealing a large gap concentrated in unannounced legacy allocations and carrier-grade NAT deployments. Furthermore, cross-checking against the IPv6 Hitlist project identified 28.1 million genuinely distinct, confirmed-live hosts, highlighting a massive amount of unrouted and unmonitored address space worldwide.