Quote from the AS112 Project Home Page:
Because most answers generated by the Internet's root name server system are negative, and many of those negative answers are in response to PTR queries for RFC1918 and other ambiguous addresses, as follows:Some other zones, such as similar IPv6 reverse zones, are also being added to the AS112 service.
There are now separate (non-root) servers for these queries...
TREX hosts an instance of the AS112 anycast servers. Members can get access to them by peering with TREX's BGP routers and accepting the following routes from them:
route: 126.96.36.199/24 descr: Root Server Technical Operations Assn descr: See: http://www.as112.net/ descr: $Id: route:188.8.131.52-24,v 1.3 2010-05-20 10:35:04 nico Exp $ origin: AS112 mnt-by: NETNOD-MNT source: RIPE # Filtered route6: 2620:4f:8000::/48 descr: Root Server Technical Operations Assn descr: Anycast prefix used for DNS service for public reverse descr: information regarding RFC 1918 addresses and other special descr: zones. See: http://www.as112.net/ descr: $Id: route6_2620:4f:8000::-48,v 1.2 2011-08-18 07:14:52 liman Exp $ origin: AS112 mnt-by: NETNOD-MNT source: RIPE #FilteredFor more information on the AS112 Project, visit the project home page.