Global IPv6 Deployment Progress Report

By Mike Leber

This page was developed in order to provide metrics for global IPv6 deployment. These statistics are updated daily. Please send questions, comments, or bugs to mleber@he.net

The tools for this report were developed while working on a paper titled "Going Native" about Hurricane's experience of adding extensive native IPv6 peering as a result of a core router and backbone upgrade.

Top Level Domains with IPv6 support

The root nameservers contain NS records listing the nameservers for the Top Level Domains (TLDs) and A and AAAA glue records to get to those nameservers. Top level domains include domain name suffixes such as .com .net .org .us .ca etc. Each TLD has specific authorative nameservers. To support IPv6 these nameservers should: Generated by parsing the root zonefile to get a list of TLDs and their associated nameservers, querying for AAAA records for the names of those nameservers and checking for AAAA records in the root zone for those nameservers.

Root Zone Downloaded: Fri Apr 18 00:30:02 2014
Root Zone Processed: Fri Apr 18 04:50:12 2014

Top Level Domains (TLDs): 533

TLDs with IPv6 nameservers: 498
Percentage of TLDs with IPv6 nameservers: 93.4%

ac academy actor ad ae aero af ag agency al am an ao aq ar archi arpa as asia associates at au aw axa az ba bar bargains be berlin best bf bg bi bid bike biz bj black blue bm bo boutique br bs bt build builders buzz bv bw by bz ca cab camera camp capital cards career careers cat catering cc cd center ceo cf cg ch cheap christmas ci cl cleaning clothing club cm cn co codes coffee college cologne com community company computer condos construction consulting contractors cooking cool coop country cr cruises cu cv cw cx cy cz dance dating de democrat desi diamonds directory dk dm dnp do domains dz ec edu education ee eg email engineering enterprises equipment er es estate et eu eus events expert exposed farm feedback fi fish fishing fj flights florist fm fo foundation fr futbol ga gal gallery gb gd ge gg gh gi gift gl glass gm gn gop gov gp gq gr graphics gripe gs gt gu guitars guru gy haus hk hn holdings holiday horse house hr ht hu id ie il im immobilien in industries info ink institute int international io iq ir is it je jetzt jm jo jobs jp kaufen ke kg kh ki kim kitchen kiwi km kn koeln kr kred kw kz la land lb lc lease li lighting limo link lk london lr ls lt lu luxury lv ly ma maison management mango marketing mc md me media meet menu mg miami mk ml mm mn mo mobi moda moe monash mr ms mt mu museum mv mw mx my mz na nagoya name nc ne net neustar nf ng ninja nl no np nr nu nyc nz okinawa om onl org pa partners parts pe pg ph photo photography photos pics pictures pink pl plumbing pm pn post pr pro productions properties ps pt pub pw py qa qpon quebec re recipes red reisen ren rentals repair report rest reviews rich ro rocks rodeo rs ru ruhr rw ryukyu sa saarland sb sc sd se services sexy sg sh shiksha shoes si singles sj sk sm sn so social sohu solar solutions su supplies supply support sv sx sy systems sz tattoo td technology tel tf tg th tienda tips tj tk tl tm tn to today tokyo tools town toys tp tr trade training travel tt tv tw tz ua ug uk university uno us uy va vacations vc ve vegas ventures vg viajes villas vision vn vodka vote voting voto voyage wang watch webcam wed wf wien wiki works xn--3bst00m xn--3ds443g xn--3e0b707e xn--45brj9c xn--55qw42g xn--55qx5d xn--6frz82g xn--6qq986b3xl xn--80ao21a xn--80asehdb xn--80aswg xn--90a3ac xn--c1avg xn--cg4bki xn--clchc0ea0b2g2a9gcd xn--czru2d xn--d1acj3b xn--fiq228c5hs xn--fiq64b xn--fiqs8s xn--fiqz9s xn--fpcrj9c3d xn--fzc2c9e2c xn--gecrj9c xn--h2brj9c xn--i1b6b1a6a2e xn--io0a7i xn--j1amh xn--j6w193g xn--kprw13d xn--kpry57d xn--lgbbat1ad8j xn--mgb9awbf xn--mgbaam7a8h xn--mgbab2bd xn--mgbayh7gpa xn--mgbbh1a71e xn--mgbc0a9azcg xn--mgberp4a5d4ar xn--mgbx4cd0ab xn--ngbc5azd xn--nqv7f xn--nqv7fs00ema xn--o3cw4h xn--ogbpf8fl xn--p1ai xn--pgbs0dh xn--q9jyb4c xn--rhqv96g xn--s9brj9c xn--ses554g xn--unup4y xn--wgbl6a xn--xkc2al3hye2a xn--xkc2dl3a5ee0h xn--yfro4i67o xn--zfr164b xxx xyz yokohama yt za zm zone

TLDs with nameservers with IPv6 glue in the root zone: 491
Percentage of TLDs that have nameservers with IPv6 glue in the root zone: 92.1%

ac academy actor ad ae aero af ag agency al am an ao aq ar archi arpa as asia associates at au aw axa az ba bar bargains be berlin best bg bi bid bike biz bj black blue bm bo boutique br bt build builders buzz bw by bz ca cab camera camp capital cards career careers cat catering cc cd center ceo cf cg ch cheap christmas ci cl cleaning clothing club cm cn co codes coffee college cologne com community company computer condos construction consulting contractors cooking cool country cr cruises cu cv cw cx cy cz dance dating de democrat desi diamonds directory dk dm dnp do domains dz ec edu education ee eg email engineering enterprises equipment er es estate et eu eus events expert exposed farm feedback fi fish fishing fj flights florist fm fo foundation fr futbol ga gal gallery gb gd ge gg gh gi gift gl glass gm gn gop gov gp gq gr graphics gripe gs gt gu guitars guru gy haus hk hn holdings holiday horse house hr ht hu id ie il im immobilien in industries info ink institute int international io iq ir is it je jetzt jm jo jobs jp kaufen ke kg kh ki kim kitchen kiwi km kn koeln kr kred kw kz la land lb lc lease li lighting limo link lk london lr ls lt lu luxury lv ly ma maison management mango marketing mc md me media meet menu mg miami mk ml mm mn mo mobi moda moe monash mr ms mt mu museum mw mx my mz na nagoya name nc ne net neustar nf ng ninja nl no np nr nu nyc nz okinawa om onl org pa partners parts pe pg ph photo photography photos pics pictures pink pl plumbing pm pn post pr pro productions properties ps pt pub pw py qa qpon quebec re recipes red reisen ren rentals repair report rest reviews rich ro rocks rodeo rs ru ruhr rw ryukyu sa saarland sb sc sd se services sexy sg sh shiksha shoes si singles sk sm sn so social sohu solar solutions su supplies supply support sv sx sy systems sz tattoo td technology tel tf tg th tienda tips tj tk tl tm tn to today tokyo tools town toys tp tr trade training travel tt tv tw tz ua ug uk university uno us uy va vacations vc ve vegas ventures vg viajes villas vision vn vodka vote voting voto voyage wang watch webcam wed wf wien wiki works xn--3bst00m xn--3ds443g xn--3e0b707e xn--45brj9c xn--55qw42g xn--55qx5d xn--6frz82g xn--6qq986b3xl xn--80ao21a xn--80asehdb xn--80aswg xn--90a3ac xn--c1avg xn--cg4bki xn--clchc0ea0b2g2a9gcd xn--czru2d xn--d1acj3b xn--fiq228c5hs xn--fiq64b xn--fiqs8s xn--fiqz9s xn--fpcrj9c3d xn--fzc2c9e2c xn--gecrj9c xn--h2brj9c xn--i1b6b1a6a2e xn--io0a7i xn--j1amh xn--j6w193g xn--kprw13d xn--kpry57d xn--mgb9awbf xn--mgbaam7a8h xn--mgbab2bd xn--mgbayh7gpa xn--mgbbh1a71e xn--mgbc0a9azcg xn--mgberp4a5d4ar xn--mgbx4cd0ab xn--ngbc5azd xn--nqv7f xn--nqv7fs00ema xn--o3cw4h xn--ogbpf8fl xn--p1ai xn--pgbs0dh xn--q9jyb4c xn--rhqv96g xn--s9brj9c xn--ses554g xn--unup4y xn--wgbl6a xn--xkc2al3hye2a xn--xkc2dl3a5ee0h xn--yfro4i67o xn--zfr164b xxx xyz yokohama yt za zm zone

Registered domains with AAAA records

Generated by querying for A (IPv4) and AAAA (IPv6) records for all domains in the listed TLDs (top level domains). Demonstrates growing use of AAAA records for the primary domain name of websites and other Internet services. (Note: we would like to add any TLDs that will allow us access for daily downloads.)
     TLD   domains         A      AAAA    A-glue AAAA-glue                downloaded                   processed
     com 113216039 101446700   2376411   2167994      6579  (Fri Apr 18 00:31:15 2014)  (Fri Apr 18 04:48:58 2014)
     net  15174466  12932645    421161    399247      5536  (Fri Apr 18 00:31:33 2014)  (Fri Apr 18 04:49:12 2014)
      de  13155766   9577546   2412371    398186       114  (Wed Jan 20 01:22:39 2010)  (Fri Apr 18 04:49:39 2014)
     org  10432833   9224287    306233    360929      3136  (Fri Apr 18 00:32:00 2014)  (Fri Apr 18 04:49:19 2014)
    info   5847165   5145877    266615    207966      1098  (Fri Apr 18 00:32:30 2014)  (Fri Apr 18 04:49:22 2014)
     biz   2643717   2240067     80013     55165       193  (Fri Apr 18 00:33:58 2014)  (Fri Apr 18 04:49:25 2014)
      us   1838397   1623806     23975     37499       234  (Fri Apr 18 00:33:43 2014)  (Fri Apr 18 04:49:27 2014)
      ca   1420247    834766      4418     16053        17  (Wed Jul 14 01:06:25 2010)  (Fri Apr 18 04:49:31 2014)
    mobi   1019736    863626     14734     21902        72  (Fri Apr 18 00:33:22 2014)  (Fri Apr 18 04:49:24 2014)
      me    714003    541887     14429     22098       201  (Thu Sep 19 02:15:53 2013)  (Fri Apr 18 04:49:44 2014)
      hu    618473    465565      2481     30735       128  (Wed Jan  2 01:33:31 2013)  (Fri Apr 18 04:49:41 2014)
      ir    428763    247989       972     18303        13  (Thu Jan  9 00:39:15 2014)  (Fri Apr 18 04:49:42 2014)
      no    422532    247550      1620      1383         3  (Fri Apr  3 02:10:44 2009)  (Fri Apr 18 04:49:46 2014)
    asia    312506    232175      4983     10270        85  (Fri Apr 18 00:34:16 2014)  (Fri Apr 18 04:49:27 2014)
      sk    261188    176457     15749      3687        34  (Fri Apr 27 00:58:22 2012)  (Fri Apr 18 04:49:48 2014)
      pt    148142     70190       485      7451        58  (Tue Mar 22 01:43:34 2011)  (Fri Apr 18 04:49:46 2014)
     tel    143220    135509         0       368        10  (Fri Apr 18 00:34:41 2014)  (Fri Apr 18 04:49:28 2014)
     xxx    106240     92893        62       168         3  (Mon Jan  2 01:49:20 2012)  (Fri Apr 18 04:49:52 2014)
      pk     44768     30813       152      2044         0  (Fri Jul 12 01:05:38 2013)  (Fri Apr 18 04:49:46 2014)
      kz     42493     23145       346     65009         0  (Sun Apr 18 01:14:46 2010)  (Fri Apr 18 04:49:43 2014)
    aero     33423      6810       143       496         1  (Fri Apr 18 00:32:54 2014)  (Fri Apr 18 04:49:23 2014)
      ma     31415      6736        43     33934         0  (Wed Dec  9 02:20:47 2009)  (Fri Apr 18 04:49:43 2014)
      bg     24721     16053        87      1858        20  (Wed Jan 12 01:40:00 2011)  (Fri Apr 18 04:49:29 2014)
      ge     17602     13804       136       522         1  (Sat Sep 21 00:43:44 2013)  (Fri Apr 18 04:49:41 2014)
      tc     16461      6239        36       195         1  (Sat Feb  9 00:52:50 2013)  (Fri Apr 18 04:49:51 2014)
      am     15428      7309       139       632         7  (Fri Oct 29 00:33:47 2010)  (Fri Apr 18 04:49:28 2014)
      to     15334     12395       484      1026         0  (Fri Apr 18 00:40:55 2014)  (Fri Apr 18 04:49:51 2014)
      ac     15116     13122        54       233         0  (Fri Oct 22 00:35:54 2010)  (Fri Apr 18 04:49:28 2014)
      ag     14031      7435       342       257         0  (Tue Nov 30 01:39:20 2010)  (Fri Apr 18 04:49:28 2014)
      gt     13622     10046        74       403         2  (Fri Apr 18 00:37:59 2014)  (Fri Apr 18 04:49:41 2014)
      ly     12026      5916        52       119         0  (Sun Jul  8 01:43:02 2012)  (Fri Apr 18 04:49:43 2014)
      uz     11329      5701        74      1811         0  (Mon Jul  4 01:49:14 2011)  (Fri Apr 18 04:49:51 2014)
      az     11103      7239       110      6422        16  (Sun Jan 22 01:41:03 2012)  (Fri Apr 18 04:49:28 2014)
      cm     10223      7458        61       140         1  (Fri Apr 18 00:36:56 2014)  (Fri Apr 18 04:49:31 2014)
      ba      9572      5779       265      7697         0  (Sat Jun  5 01:05:06 2010)  (Fri Apr 18 04:49:28 2014)
      pe      8772      3506        22       178         0  (Wed Feb 10 01:19:43 2010)  (Fri Apr 18 04:49:46 2014)
      lk      8512      4649        41     12198        16  (Sat Sep  3 01:48:08 2011)  (Fri Apr 18 04:49:43 2014)
      ec      8469      3674        43       129         4  (Fri Aug  5 01:49:25 2011)  (Fri Apr 18 04:49:40 2014)
      vg      8402      4707        60       131         1  (Thu Jan 31 00:48:52 2013)  (Fri Apr 18 04:49:52 2014)
      bm      8109      2318         5       125         0  (Thu Nov 22 01:46:29 2012)  (Fri Apr 18 04:49:29 2014)
    coop      7651      5782        53       384         0  (Fri Apr 18 00:34:38 2014)  (Fri Apr 18 04:49:28 2014)
      sv      7329      4885        20      3215         0  (Fri Apr 18 00:40:39 2014)  (Fri Apr 18 04:49:50 2014)
      al      6967      3924        23        64         0  (Sat Apr 21 00:39:08 2012)  (Fri Apr 18 04:49:28 2014)
xn--j1amh      6672      5489       496        17         0  (Thu Apr 17 00:44:18 2014)  (Fri Apr 18 04:49:52 2014)
      tj      6666      4473       141       103         0  (Mon Oct 14 01:38:44 2013)  (Fri Apr 18 04:49:51 2014)
      jm      6380      3026         4      6857         0  (Tue Dec  6 01:43:11 2011)  (Fri Apr 18 04:49:42 2014)
      cr      5880      2811        33       292         0  (Mon Jul 23 02:05:13 2012)  (Fri Apr 18 04:49:31 2014)
      tn      5621      1608        25        16         1  (Wed May  9 00:46:58 2012)  (Fri Apr 18 04:49:51 2014)
      do      5276      3024        53       108         1  (Thu Apr 11 01:39:48 2013)  (Fri Apr 18 04:49:40 2014)
      ps      4890      2197        26       100         0  (Mon Nov  1 00:40:56 2010)  (Fri Apr 18 04:49:46 2014)
      kg      4774      2736        49       289         0  (Fri Dec  9 01:42:34 2011)  (Fri Apr 18 04:49:42 2014)
      hn      4742      2940        40       163         1  (Mon Mar 18 00:44:42 2013)  (Fri Apr 18 04:49:41 2014)
      gl      4630      2160        79        17         0  (Thu Aug  4 01:49:07 2011)  (Fri Apr 18 04:49:41 2014)
      gd      4257      2412        64        26         1  (Wed Feb 20 00:34:32 2013)  (Fri Apr 18 04:49:40 2014)
      sc      4237      3229        81       207         2  (Fri Apr 18 00:40:15 2014)  (Fri Apr 18 04:49:47 2014)
      tm      3788      2129        13        42         0  (Fri Oct 22 00:43:17 2010)  (Fri Apr 18 04:49:51 2014)
      sn      3562      1441        12       289         1  (Fri Dec  2 01:44:58 2011)  (Fri Apr 18 04:49:48 2014)
      ci      3489      2446        12        72         0  (Fri Apr 18 00:35:47 2014)  (Fri Apr 18 04:49:31 2014)
      io      3421      2345        91        98         0  (Fri Oct 22 00:38:53 2010)  (Fri Apr 18 04:49:42 2014)
      ug      3258      1319        14        75         0  (Mon Nov  9 02:12:10 2009)  (Fri Apr 18 04:49:51 2014)
      fo      3118      2454       111        20         0  (Wed Apr 17 01:40:22 2013)  (Fri Apr 18 04:49:40 2014)
      sh      3029      1618        56        85         2  (Fri Oct 22 00:42:38 2010)  (Fri Apr 18 04:49:48 2014)
      je      2730      1161        22        19         0  (Fri Jul 30 01:07:12 2010)  (Fri Apr 18 04:49:42 2014)
      tt      2374      1331         9        53         2  (Mon Oct  3 01:47:28 2011)  (Fri Apr 18 04:49:51 2014)
      bs      2300      1090         7        82         0  (Wed Apr  6 02:05:29 2011)  (Fri Apr 18 04:49:29 2014)
      gg      2287      1137        18         9         0  (Fri Jul 30 01:06:34 2010)  (Fri Apr 18 04:49:41 2014)
      mc      2239       910         7        25         0  (Fri Apr 18 00:38:23 2014)  (Fri Apr 18 04:49:43 2014)
      gy      2214      1736        93        45         0  (Fri Apr 18 00:37:26 2014)  (Fri Apr 18 04:49:41 2014)
      lc      1810       474         7        48         0  (Wed Oct 27 00:55:12 2010)  (Fri Apr 18 04:49:43 2014)
      pg      1726       807         1        30         0  (Fri Apr 18 00:39:29 2014)  (Fri Apr 18 04:49:46 2014)
      jo      1559       911         7        39         0  (Fri Nov 18 01:45:28 2011)  (Fri Apr 18 04:49:42 2014)
      mw      1501       744         5         0         0  (Fri Apr 18 00:38:59 2014)  (Fri Apr 18 04:49:44 2014)
      bi      1360       924        14        16         1  (Fri Apr 18 00:35:31 2014)  (Fri Apr 18 04:49:29 2014)
      sr      1203       553         2        13         0  (Thu Oct 15 02:27:19 2009)  (Fri Apr 18 04:49:48 2014)
      sl      1109       728        13        36         0  (Fri Apr 18 00:40:17 2014)  (Fri Apr 18 04:49:48 2014)
      bf       953       420         8        97         0  (Fri Apr 18 00:34:57 2014)  (Fri Apr 18 04:49:29 2014)
      cv       834       580         9       184         8  (Fri Apr 27 00:55:54 2012)  (Fri Apr 18 04:49:31 2014)
      cu       809       218         7       653         8  (Mon Jan 24 01:48:44 2011)  (Fri Apr 18 04:49:31 2014)
      bb       791       434         1         2         0  (Fri Apr 18 00:34:55 2014)  (Fri Apr 18 04:49:29 2014)
      nf       738       432         4        12         0  (Thu Dec  9 01:43:21 2010)  (Fri Apr 18 04:49:45 2014)
      aw       616       289         1         3         0  (Fri Mar  8 01:38:55 2013)  (Fri Apr 18 04:49:28 2014)
      cw       472       265         5        13         0  (Fri Apr 18 00:36:35 2014)  (Fri Apr 18 04:49:31 2014)
      bj       366       208         7        38         0  (Wed Feb 15 01:41:41 2012)  (Fri Apr 18 04:49:29 2014)
      ga       350        56         2       514         0  (Wed Oct 26 01:47:11 2011)  (Fri Apr 18 04:49:40 2014)
      ao       334       150         6       167         2  (Fri Apr 18 00:34:49 2014)  (Fri Apr 18 04:49:28 2014)
      mo       318       193         1        75         2  (Fri Apr 18 00:38:46 2014)  (Fri Apr 18 04:49:44 2014)
      ki       283       135         2         0         0  (Wed Feb 15 01:43:02 2012)  (Fri Apr 18 04:49:42 2014)
      pf       276       189         2        35         0  (Fri Apr 18 00:39:27 2014)  (Fri Apr 18 04:49:46 2014)
      na       226        67         2         6         0  (Mon Aug 15 01:48:26 2011)  (Fri Apr 18 04:49:44 2014)
     int       180       116         2        68         1  (Fri Apr 18 00:37:39 2014)  (Fri Apr 18 04:49:42 2014)
      ne       149        51         5        82         0  (Sat May  5 01:50:39 2012)  (Fri Apr 18 04:49:45 2014)
      iq       149        82         2        14         0  (Thu Apr 25 00:36:24 2013)  (Fri Apr 18 04:49:42 2014)
      ni       146        91         2         5         0  (Sun Apr 13 00:39:37 2014)  (Fri Apr 18 04:49:45 2014)
      ml       117        59         1        24         0  (Wed Mar 27 00:37:25 2013)  (Fri Apr 18 04:49:44 2014)
      au        20         1         1        27         4  (Fri Apr  3 01:55:15 2009)  (Fri Apr 18 04:49:28 2014)
    arpa        10         1         0        12        12  (Fri Apr 18 00:30:07 2014)  (Fri Apr 18 04:49:28 2014)

   total 168426550 146385380   5951252   3909948     17633

Total registered domains with AAAA records: 5951252

This tells you the number of registered domains that have added IPv6 for their primary domain, for the set of TLDs above, which is a partial listing based on what TLDs we could get access to. It does not include subdomains i.e. ipv6.google.com, which means our number is a lower bound and that the number of IPv6 enabled domains is even higher.

Eventually the really important number here is the total number of domains returning AAAA records. However, right now a large amount of the domains included in this number are the result of SEDO (search engine domain optimization) parking operations. By looking at the gradual increase in the people that have AAAA glue in the TLD zone files for their authorative nameservers we can tell that the trend of individual companies enabling IPv6 for their websites and other infrastructure is upwards.

Top 1000 Usenet Servers with IPv6 support

Generated by parsing the top 1000 usenet servers (from Top 1000 Usenet Servers) and querying for A and AAAA records. Note: Due to how the usenet protocol works not every listed usenet server has a direct addresses (some usenet server names are not fully qualified domain names).

Top 1000 Downloaded: Sat Nov 5 20:30:42 2011
Top 1000 Processed: Fri Apr 18 04:50:34 2014

Top 1000 Usenet Servers: 1000
Top 1000 Usenet Servers with a direct IPv4 address: 630
Top 1000 Usenet Servers with a direct IPv6 address: 118
Percentage of top 1000 Usenet Servers with direct addresses with IPv6 support: 18.73%

Networks Running IPv6

We can measure the percentage of networks running IPv6 by comparing the set of ASes in the IPv6 routing table to those in the combined set of IPv4 and IPv6.

IPv4 and IPv6 RIBs Last Parsed: Fri Apr 18 01:08:00 PDT 2014

IPv4 ASes: 46910

IPv6 ASes: 8198

ASes using only IPv4: 38855

ASes using only IPv6: 143

ASes using IPv4 and IPv6: 8055

ASes using IPv4 or IPv6: 47053

Percentage of ASes (IPv4 or IPv6) running IPv6: 17.4%

IPv6 rDNS Nameservers running IPv6

One amusing measure of IPv6 deployment to ask the question: What percentage of IPv6 reverse DNS servers are reachable via IPv6?

(ping tests and dns queries run from a server on Hurricane Electric's IPv4 and IPv6 backbone in Fremont, California.)

IPv6 rDNS Nameservers Last Polled: Fri Apr 18 06:08:49 PDT 2014

IPv6 Prefixes: 16809

IPv6 rDNS Nameservers: 8719

IPv6 rDNS Nameservers with an IPv4 address: 8586

IPv6 rDNS Nameservers with an IPv6 address: 4629

IPv6 rDNS Nameservers reachable via IPv4 (ping or dns): 7035

IPv6 rDNS Nameservers reachable via IPv6 (ping or dns): 3732

IPv6 rDNS Nameservers reachable via IPv4 or IPv6: 7418

IPv6 rDNS Nameservers reachable via IPv4 and IPv6: 3349

Percentage reachable IPv6 rDNS Nameservers reachable via IPv6: 50.3%

IPv6 Performance

Actually, the reason we looked at IPv6 reverse DNS servers was to get some hosts on both IPv6 and IPv4 so that we can compare IPv6 vs IPv4 latency.

IPv6 rDNS Nameservers where IPv6 is faster than IPv4 (by more than 1ms): 2167

IPv6 rDNS Nameservers where IPv4 and IPv6 are the same speed (within 1ms): 401

IPv6 rDNS Nameservers where IPv4 is faster than IPv6 (by more than 1ms): 781

IPv6 rDNS nameservers where IPv6 is as fast or faster than IPv4 (within 1ms): 2568

Percentage of IPv6 rDNS Nameservers where IPv6 is as fast or faster than IPv4 (within 1ms): 76.7%

Top Websites Running IPv6

A very quick way to measure IPv6 deployment for websites is just to check for a AAAA record in DNS.

Alexa provides an approximate list of the most popular sites on the web.

In the report below, the raw domain is the base domain, such as free.fr, which does not have an AAAA record (at the time of this writing. However www.free.fr *does* have a AAAA record. So we check both.

Another convention is to add an AAAA using ipv6 as a subdomain, i.e. ipv6.google.com. The reason so many domains show up as having A records for "ipv6." subdomains is because many domains use wildcard records in DNS which respond to queries for any subdomain.

Alexa Top 1 Million Domains Downloaded: Fri Apr 18 00:00:07 2014
Alexa Top 1 Million Domains Processed: Fri Apr 18 00:34:56 2014

Alexa 1M raw domains: 1000000
Alexa 1M raw with a direct IPv4 address: 948245
Alexa 1M raw with a direct IPv6 address: 55505

(top 100)
wikipedia.org 2620:0:861:ed1a::1
youm7.com 2400:cb00:2048:1::8d65:726a
flipkart.com 2001:df0:23e:9002::15
facebook.com 2a03:2880:2110:df07:face:b00c:0:1
google.com 2a00:1450:4017:801::1000
google.com.hk 2a00:1450:4017:801::101f
youtube.com 2001:4860:400b:c01::be
blogspot.com 2001:4860:400b:c01::bf
google.ch 2607:f8b0:4005:802::1018
google.cl 2a00:1450:4017:801::101f
google.de 2607:f8b0:4005:802::1017
google.com.bd 2607:f8b0:4005:802::101f
google.co.jp 2607:f8b0:4007:805::1017
google.com.mx 2607:f8b0:4010:801::1018
google.co.hu 2a00:1450:4017:801::101f
google.ru 2607:f8b0:4004:806::1017
blogspot.in 2607:f8b0:4003:c04::bf
google.com.br 2607:f8b0:4000:806::101f
google.com.au 2607:f8b0:4005:802::1017
google.com.sg 2607:f8b0:4010:801::101f
google.com.my 2607:f8b0:4010:801::1017
google.ae 2607:f8b0:4010:801::1017
blogger.com 2607:f8b0:400e:c02::bf
google.fr 2607:f8b0:4005:802::1017
cloudflare.com 2400:cb00:2048:1::c629:d49d
blogspot.mx 2607:f8b0:400e:c04::bf
blogspot.com.es 2607:f8b0:400e:c04::bf
google.ca 2607:f8b0:4010:801::1017
goo.gl 2607:f8b0:4005:802::1004
google.com.tw 2607:f8b0:4007:804::1017
google.cn 2607:f8b0:400e:c04::a0
google.com.ar 2607:f8b0:4010:801::1018
google.az 2607:f8b0:400e:c04::93
google.com.eg 2607:f8b0:4005:802::1017
blogspot.de 2607:f8b0:400e:c04::bf
google.fi 2607:f8b0:4000:806::1017
google.co.in 2607:f8b0:4007:802::1017
google.co.za 2a00:1450:4001:c02::5e
blogspot.fr 2607:f8b0:400e:c02::bf
google.com.vn 2607:f8b0:4005:802::1018
google.com.co 2607:f8b0:4000:806::1017
google.be 2607:f8b0:4004:806::101f
google.co.id 2607:f8b0:4005:802::1017
google.dk 2607:f8b0:4005:802::1017
google.com.ua 2607:f8b0:4010:801::1017
blogspot.com.br 2607:f8b0:400e:c04::bf
google.se 2607:f8b0:4005:802::101f
google.ro 2607:f8b0:4010:801::101f
blogspot.ru 2a00:1450:400c:c06::bf
google.co.il 2607:f8b0:4010:801::101f
blogspot.gr 2607:f8b0:400e:c04::bf
google.sk 2607:f8b0:4005:802::1017
google.at 2607:f8b0:4010:801::101f
blogspot.jp 2607:f8b0:400e:c02::bf
google.kz 2607:f8b0:4005:802::1014
google.com.sa 2607:f8b0:4010:801::1018
privatehomeclips.com 2400:cb00:2048:1::a29f:f626
eztv.it 2400:cb00:2048:1::a29f:f4f9
imagetwist.com 2400:cb00:2048:1::a29f:f1f4
blogspot.com.tr 2607:f8b0:400e:c03::bf
google.bg 2607:f8b0:4005:802::101f
google.gr 2607:f8b0:400a:801::101f
google.pt 2607:f8b0:4010:801::1018
google.es 2607:f8b0:4005:802::101f
google.co.nz 2a00:1450:4017:801::101f
stanford.edu 2607:f6d0:0:925a::ab43:d7c8
google.it 2607:f8b0:4010:801::1017
blogspot.com.ar 2607:f8b0:400e:c04::bf
google.pl 2607:f8b0:4005:802::101f
google.com.ec 2607:f8b0:4010:801::1018
google.com.do 2607:f8b0:4005:802::101f
android.com 2607:f8b0:4005:802::1014
google.co.ve 2607:f8b0:400e:c03::5e
google.com.pe 2607:f8b0:4005:802::1018
softlayer.com 2607:f0d0:1000:11:1::4
feedburner.com 2607:f8b0:4005:802::1002
google.com.ph 2607:f8b0:4005:802::1017
google.lt 2607:f8b0:4005:802::1018
mtsindia.in 2406:5600:9:300::80
popcash.net 2400:cb00:2048:1::a29f:f325
centurylink.com 2001:428:b21:1::20
videoyoum7.com 2400:cb00:2048:1::a29f:fd3d
blogspot.kr 2607:f8b0:400d:c01::bf
google.hr 2607:f8b0:4007:802::1018
google.iq 2607:f8b0:4005:802::1018
att.com 2001:1890:1c00:5112::f:1008
google.si 2607:f8b0:4010:801::1017
cyberciti.biz 2607:f0d0:1002:51::4
doubleclick.com 2607:f8b0:4005:802::1001
noaa.gov 2610:20:8800:8c00::24
tubecup.com 2400:cb00:2048:1::c629:f91b
google.com.af 2607:f8b0:4005:802::1011
mediatemple.net 2606:2300:4:8:fa9b:30de:e2e5:50bb
thisav.com 2400:cb00:2048:1::8d65:793e
shoutmeloud.com 2400:cb00:2048:1::8d65:7457
google.lk 2607:f8b0:4007:802::101f
google.com.pk 2607:f8b0:400a:801::1017
usgs.gov 2001:49c8:c000:121c::151
couchtuner.eu 2400:cb00:2048:1::6ca2:c7e7
panoramio.com 2607:f8b0:4005:802::1003

www. + Alexa 1M domains: 1000000
www. + Alexa 1M with a direct IPv4 address: 966268
www. + Alexa 1M with a direct IPv6 address: 72281

(top 100)
www.wikipedia.org 2620:0:863:ed1a::1
www.facebook.com 2a03:2880:f016:401:face:b00c:0:1
www.uol.com.br 2804:49c:319:430::100
www.flipkart.com 2001:df0:23e:9002::15
www.apple.com 2600:1406:1a:39e::c77
www.fbcdn.net 2a03:2880:2110:df07:face:b00c:0:1
www.irs.gov 2600:1406:1::addf:e848
www.wikimedia.org 2620:0:863:ed1a::1
www.att.com 2001:418:142c:18c::90e
www.youm7.com 2400:cb00:2048:1::8d65:726a
www.java.com 2600:1406:1:1:9f00::1ba3
www.wiktionary.org 2620:0:863:ed1a::1
www.free-tv-video-online.me 2400:cb00:2048:1::c629:f971
www.immobilienscout24.de 2600:1406:1a:393::1546
www.google.com 2a00:1450:4017:801::1012
www.google.ru 2607:f8b0:4005:802::1018
www.youtube.com 2001:4860:400b:c01::5b
www.blogspot.com 2001:4860:400b:c01::bf
www.google.co.in 2404:6800:4005:807::1018
www.google.com.au 2607:f8b0:4005:802::1018
www.google.ca 2607:f8b0:4010:801::101f
www.google.co.jp 2607:f8b0:400e:c04::5e
www.google.fr 2607:f8b0:4005:802::1018
www.google.it 2607:f8b0:4010:801::1017
www.google.co.uk 2607:f8b0:4005:802::101f
www.google.com.hk 2a00:1450:4017:801::1017
www.google.es 2607:f8b0:4005:802::1018
www.blogger.com 2607:f8b0:400e:c02::bf
www.google.com.tr 2607:f8b0:4009:803::1017
www.google.com.ar 2607:f8b0:4010:801::1017
www.popcash.net 2400:cb00:2048:1::a29f:f325
www.brainyquote.com 2400:cb00:2048:1::8d65:711a
www.googleusercontent.com 2607:f8b0:4005:802::100a
www.life.com.tw 2400:cb00:2048:1::a29f:f249
www.google.com.pk 2404:6800:4005:800::1017
www.google.co.th 2607:f8b0:4005:802::1018
www.google.pl 2607:f8b0:4005:802::1018
www.google.nl 2607:f8b0:4005:802::1018
www.google.com.sa 2607:f8b0:4010:801::1017
www.google.com.mx 2607:f8b0:4010:801::101f
www.google.com.eg 2607:f8b0:4005:802::1018
www.google.com.tw 2607:f8b0:4005:802::1018
www.eztv.it 2400:cb00:2048:1::a29f:f3f9
www.wpmudev.org 2400:cb00:2048:1::c629:f9ba
www.google.co.za 2a00:1450:4013:c00::5e
www.google.com.vn 2607:f8b0:4005:802::1017
www.google.se 2607:f8b0:4005:802::1017
www.blogspot.com.br 2607:f8b0:400e:c04::bf
www.google.cl 2a00:1450:4017:801::1017
www.google.gr 2404:6800:4005:800::1018
www.google.com.ng 2607:f8b0:4009:801::101f
www.google.be 2607:f8b0:4005:802::1017
www.google.ro 2607:f8b0:4010:801::1017
www.google.co.ve 2607:f8b0:400e:c03::5e
www.google.com.ph 2607:f8b0:4005:802::1017
www.google.at 2607:f8b0:4010:801::101f
www.blogspot.com.es 2607:f8b0:400e:c04::bf
www.google.ch 2607:f8b0:4005:802::1017
www.google.com.ua 2607:f8b0:4010:801::1017
www.google.pt 2607:f8b0:4010:801::101f
www.google.com.sg 2607:f8b0:4008:805::1017
www.google.no 2607:f8b0:4005:802::1018
www.google.cz 2607:f8b0:4005:802::1017
www.google.com.bd 2607:f8b0:4005:802::1017
www.blogspot.mx 2607:f8b0:400e:c04::bf
www.goo.gl 2607:f8b0:4005:802::1001
www.google.co.id 2607:f8b0:4005:802::1017
www.doubleclick.com 2607:f8b0:4005:802::1009
www.google.dk 2607:f8b0:4005:802::1018
www.google.az 2607:f8b0:400e:c04::5e
www.google.de 2607:f8b0:4005:802::1017
www.google.dz 2607:f8b0:4005:802::101f
www.google.com.pe 2607:f8b0:4005:802::1018
www.google.co.il 2001:4860:4007:800::1017
www.google.ae 2607:f8b0:4010:801::1017
www.google.co.kr 2607:f8b0:4007:802::1017
www.blogspot.de 2607:f8b0:400e:c04::bf
www.google.cn 2607:f8b0:400e:c04::a0
www.blogspot.jp 2607:f8b0:400e:c02::bf
www.google.sk 2607:f8b0:4009:801::1017
www.stanford.edu 2607:f6d0:0:925a::ab43:d7c8
www.blogspot.ru 2a00:1450:400c:c06::bf
www.blogspot.gr 2607:f8b0:400e:c04::bf
www.state.gov 2600:1406:1::addf:e848
www.google.com.kw 2a00:1450:4010:c03::5e
www.google.kz 2607:f8b0:4005:802::1018
www.blogspot.com.tr 2607:f8b0:400e:c03::bf
www.google.bg 2607:f8b0:4005:802::1017
www.bab.la 2400:cb00:2048:1::6ca2:c699
www.binarysystem4u.com 2400:cb00:2048:1::8d65:75d9
www.imagetwist.com 2400:cb00:2048:1::a29f:f0f4
www.google.co.nz 2a00:1450:4017:801::101f
www.google.lk 2404:6800:4005:807::1018
www.mozilla.org 2620:101:8008:5::2:1
www.google.com.ec 2607:f8b0:4010:801::101f
www.privatehomeclips.com 2400:cb00:2048:1::a29f:f726
www.pravda.com.ua 2607:f8b0:400e:c01::79
www.google.com.ly 2607:f8b0:4010:801::1017
www.viooz.co 2400:cb00:2048:1::8d65:747d
www.google.rs 2a00:1450:4013:c00::5e

ipv6. + Alexa 1M domains: 1000000
ipv6. + Alexa 1M with a direct IPv4 address: 230477
ipv6. + Alexa 1M with a direct IPv6 address: 29546

(top 100)
ipv6.ebay.com 2620:0:503:429::feed:bacc
ipv6.cnn.com 2620:100:e000::8001
ipv6.scribd.com 2607:f0d0:1004:2::4
ipv6.mozilla.org 2620:101:8008:5::2:8
ipv6.netflix.com 2620:0:ef0:13::20
ipv6.flipkart.com 2001:df0:23e:9002::15
ipv6.archive.org 2620:0:9c0:6::4
ipv6.youm7.com 2400:cb00:2048:1::be5d:f56a
ipv6.comcast.net 2001:2031:0:4::d1aa:5bcb
ipv6.yts.re 2605:f700:80:800::f3df:bae6
ipv6.google.com 2a00:1450:4017:801::1001
ipv6.google.com.hk 2a00:1450:4017:801::1001
ipv6.google.co.jp 2607:f8b0:400e:c04::65
ipv6.mapquest.com 2001:4b0:1668:2211:1::4
ipv6.match.com 2620:10e:a001:3::10
ipv6.firstpost.com 2600:1406:1::addf:e808
ipv6.nasa.gov 2600:1406:1::addf:e818
ipv6.googleusercontent.com 2607:f8b0:4005:802::100b
ipv6.blogspot.mx 2607:f8b0:4005:802::100a
ipv6.kaskus.co.id 2404:8000:10:1::2
ipv6.rutube.ru 2001:67c:25d0:200::2
ipv6.blogspot.jp 2607:f8b0:4005:802::100a
ipv6.blogspot.com.tr 2607:f8b0:4010:801::100c
ipv6.xkcd.com 2001:4830:120:1::2
ipv6.bab.la 2400:cb00:2048:1::6ca2:c799
ipv6.mtsindia.in 2406:5600:7:1::3
ipv6.videoyoum7.com 2400:cb00:2048:1::a29f:fe3c
ipv6.blogspot.com 2607:f8b0:4010:801::100c
ipv6.blogspot.tw 2607:f8b0:4005:802::100c
ipv6.inagist.com 2600:3c00:1::607e:7725
ipv6.googleapis.com 2607:f8b0:400e:c04::5f
ipv6.blogspot.in 2607:f8b0:4000:806::100a
ipv6.blogspot.fr 2607:f8b0:400a:801::100c
ipv6.blogspot.de 2607:f8b0:4005:802::100a
ipv6.t-mobile.com 2607:fb90:beef:c137::3
ipv6.blogspot.gr 2607:f8b0:4005:802::100b
ipv6.blogspot.com.es 2607:f8b0:4007:804::100c
ipv6.beatport.com 2620:56:8000:4000:0:1:1:1
ipv6.ovh.com 2001:41d0:1:1b00:213:186:33:34
ipv6.outlook.com 2a01:111:f400:1800::6
ipv6.cox.net 2001:578:0:6e2::80
ipv6.blogspot.com.ar 2607:f8b0:4007:802::100a
ipv6.zynga.com 2620:102:8000:200::127
ipv6.avaaz.org 2400:cb00:2048:1::8d65:73d5
ipv6.blogspot.ro 2607:f8b0:4005:802::100c
ipv6.enom.com 2620:10f:5000:5000::2
ipv6.blogspot.nl 2607:f8b0:4010:801::100c
ipv6.sergey-mavrodi.com 2400:cb00:2048:1::a29f:fcfd
ipv6.blogspot.kr 2607:f8b0:4004:806::100a
ipv6.bitsnoop.com 2a02:29b8:1925::2
ipv6.tomshardware.com 2a01:8200:1001::80
ipv6.autoblog.com 2001:4b0:1668:2211:1::2
ipv6.aol.com 2001:4b0:1668:3c06:1::1
ipv6.sex.com 2607:fc10:1:400::82
ipv6.google.cn 2607:f8b0:4005:802::1005
ipv6.sprint.com 2600::ffff
ipv6.identi.li 2400:cb00:2048:1::a29f:f0ed
ipv6.miniclip.com 2a02:5f8:1:46d::120
ipv6.cpanel.net 2620:0:28a0:1528:230:48ff:fece:9f78
ipv6.plurk.com 2607:f128:47::1:1
ipv6.blackberry.com 2607:ffc0:c:1:208:65:75:22
ipv6.upenn.edu 2600:1406:1::addf:e829
ipv6.jne.co.id 2400:cb00:2048:1::6ca2:c746
ipv6.maduradas.com 2400:cb00:2048:1::a29f:f2e0
ipv6.withgoogle.com 2607:f8b0:400e:c04::8d
ipv6.cuevana.tv 2400:cb00:2048:1::6ca2:c73b
ipv6.animeflv.net 2400:cb00:2048:1::a29f:faba
ipv6.aboutus.org 2406:da00:ff00::36d1:7b73
ipv6.blogspot.com.br 2607:f8b0:4007:804::100a
ipv6.seriespepito.com 2a00:1d70:c01c::110:91
ipv6.fbsbx.com 2a03:2880:2110:df07:face:b00c:0:1
ipv6.lindaikeji.blogspot.com 2607:f8b0:4004:806::100b
ipv6.googlecode.com 2607:f8b0:400e:c04::52
ipv6.sdpnoticias.com 2001:4801:7901:0:d0b1:3a58:0:2
ipv6.blogspot.ch 2607:f8b0:4010:801::100c
ipv6.fark.com 2607:f100:3:164:fa12:1c:bee:12
ipv6.techinasia.com 2400:cb00:2048:1::8d65:75a5
ipv6.enlacespepito.com 2a00:1d70:c01c::231:195
ipv6.nginx.org 2001:1af8:4060:a004:21::e3
ipv6.akamai.com 2600:1406:1::addf:e852
ipv6.blogspot.hk 2607:f8b0:4005:802::100a
ipv6.boards.ie 2a01:258:f000:3::107
ipv6.aporrea.org 2400:cb00:2048:1::6ca2:c431
ipv6.epochtimes.com 2001:49f0:a000:7:37e7:ea68:bb14:e822
ipv6.edgesuite.net 2600:1406:1::addf:e848
ipv6.blogspot.no 2607:f8b0:4007:804::100b
ipv6.blogspot.fi 2607:f8b0:4007:804::100b
ipv6.fansided.com 2400:cb00:2048:1::c71b:8791
ipv6.cornell.edu 2620:110:d000:5::5
ipv6.twentytwowords.com 2400:cb00:2048:1::a29f:f416
ipv6.teamliquid.net 2001:48c8:1:400::2
ipv6.bbc.co.uk 2001:4b10:bbc::1
ipv6.frandroid.com 2400:cb00:2048:1::6ca2:c683
ipv6.cairodar.com 2400:cb00:2048:1::a29f:fe3d
ipv6.spankbang.com 2400:cb00:2048:1::8d65:7422
ipv6.yandex.ru 2a02:6b8::3
ipv6.moodle.org 2400:cb00:2048:1::be5d:ff05
ipv6.foozine.com 2001:8d8:881:5f00::74:5711
ipv6.naver.com 2402:de00:11::9
ipv6.yandex.ua 2a02:6b8::3