The only thing it explicitly strips out are dotted-quads, which don't occur until # 4255. The code makes five passes at getaddrinfo() for IPv4 before giving up, and then it checks for a leading www and if that exists it strips it off and does the 5 tries loop again, then later the same process for IPv6. For the top 100 run: akamaihd.net no IPv4 no IPv6 bp.blogspot.com no IPv4 no IPv6
FWIW ::: Dotted-quad's in the top 10,000 4255,92.242.195.24 4665,1.1.1.1 5079,92.242.195.231 6130,1.254.254.254 9518,208.98.30.70 > whois 92.242.195.24 ... netname: Respina descr: BroadBand IP Pool country: IR ... route: 92.242.195.0/24 Respina BroadBand IP Pool in the top 100,000 4255,92.242.195.24 5079,92.242.195.231 10059,92.242.195.233 23912,92.242.195.30 31520,92.242.195.111 35867,92.242.195.235 95233,92.242.195.129 > -----Original Message----- > From: Owen DeLong [mailto:o...@delong.com] > Sent: Friday, November 22, 2013 12:16 PM > To: joel jaeggli > Cc: valdis.kletni...@vt.edu; Tony Hain; NANOG List > Subject: Re: NAT64 and matching identities > > It would be way more than 2 if it were CNAME, methinks. > > Owen > > On Nov 22, 2013, at 12:12 PM, joel jaeggli <joe...@bogus.com> wrote: > > > On 11/22/13, 12:01 PM, valdis.kletni...@vt.edu wrote: > >> On Fri, 22 Nov 2013 10:18:27 -0800, "Tony Hain" said: > >> > >>> The top 100 websites: AAAA records and IPv6 connectivity > >>> count with A: 98 ( 98.000%) > >>> count with AAAA: 30 ( 30.000%) > >>> Of the 30 hosts with AAAA records, testing connectivity to TCP/80: > >>> count with IPv6 ok: 30 (100.000%) > >> > >> Statistics whoopsie, or are there actually 2 sites in the top100 that > >> are IPv6-only? > > > > IN CNAME ? or is that being accounted for. > > > > > >