Following the progressive exhaustion of IPv4 address space, we observed a parallel growth in commercial trading of available IPv4 addresses which led to a global redistribution of address blocks from their original “birthplace”. Such is the case of address blocks that had been originally allocated by a given Regional Internet Registry (RIR) – say ARIN, for example – but were then sold to a company that started to use and announce them in a completely different region – say RIPE. While this is perfectly fine and legitimate, it sometimes poses an additional burden on those subjects, namely Internet Exchange Points, that rely on information stored into Internet Routing Registries (IRR)…