Comments on: SixXs: IPv6 Visibility of Default Free Prefixes (DFP’s) as delegated by the RIR’s. http://www.ipv6observatory.eu/2012/05/28/sixxs-ipv6-visibility-of-default-free-prefixes-dfps-as-delegated-by-the-rirs/ IPv6 worldwide monitoring study Thu, 24 May 2012 16:04:42 +0000 hourly 1 http://wordpress.org/?v=3.3.2