THE GRH PROJECT HAS BEEN CONCLUDED As IPv6 Routing Stability has improved over the years we have concluded the GRH project. The GRH pages remain for a historical perspective. The ULA Registry remains active. These pages show the visibility of Default Free Prefixes (DFP's) as delegated by the RIR's. This is seen from the ISPs as listed on the Ghosts pages. If a prefix is seen by any of these ISPs i