Someone from Alexa really needs to answer how that list is created because their web site discussion is way too hand-wavy, but given that neither of those appear to be currently valid names, and 1.1.1.1 is on the list at all, there must be some measure of cross link and redirection occurrences. For the entire top-1m, I show today's file has 2815 as dotted-quad. In the top 50,000 there are 1790 with "no IPv4 no IPv6". Clearly they don't bother to prune the list for validity. ~4% of the next 25,000 names are dead (50,000-75,000), and one can only guess that as you get further down the list the percentage of dead names will continue to go up. I have a full 1M run in process, but would not count on it completing before Monday. Just to add a level of 'extra effort' to the process, I increased the number of attempts to 10, and the time between attempts to 10 seconds. With that, dead names in the top 1000: akamaihd.net no IPv4 no IPv6 bp.blogspot.com no IPv4 no IPv6 delta-search.com no IPv4 no IPv6 bannersdontwork.com no IPv4 no IPv6 cloudfront.net no IPv4 no IPv6 doorblog.jp no IPv4 no IPv6 uimserv.net no IPv4 no IPv6 linksynergy.com no IPv4 no IPv6 lipixeltrack.com no IPv4 no IPv6 australianbrewingcompany.com no IPv4 no IPv6 searchfun.in no IPv4 no IPv6 greatappsdownload.com no IPv4 no IPv6 klikbca.com no IPv4 no IPv6 jobfindgold.info no IPv4 no IPv6 adnxs.com no IPv4 no IPv6 rakuten.ne.jp no IPv4 no IPv6 sweetpacks-search.com no IPv4 no IPv6 yomiuri.co.jp no IPv4 no IPv6 incredibar-search.com no IPv4 no IPv6 searchgol.com no IPv4 no IPv6 livedoor.biz no IPv4 no IPv6 workercn.cn no IPv4 no IPv6 FWIW: in the top 50,000, I show 1525 "has IPv4 has IPv6" & 0 "no IPv4 has IPv6". In other words, there are more dead names than there are AAAA records, and there are not any IPv6-only sites in that group. Tony
-----Original Message----- From: Owen DeLong [mailto:owen@delong.com] Sent: Friday, November 22, 2013 1:48 PM To: Tony Hain Cc: joel jaeggli; Valdis.Kletnieks@vt.edu; NANOG List Subject: Re: NAT64 and matching identities
So one has to wonder how those names made it into the top 100 list if it's supposed to be a top 100 web sites, since they are obviously not web sites. (at least in the case of the two in the top 100)
Owen
On Nov 22, 2013, at 1:28 PM, Tony Hain <alh-ietf@tndh.net> wrote:
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:owen@delong.com] Sent: Friday, November 22, 2013 12:16 PM To: joel jaeggli Cc: Valdis.Kletnieks@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 <joelja@bogus.com> wrote:
On 11/22/13, 12:01 PM, Valdis.Kletnieks@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.