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: Mon Feb 8 01:00:03 2010
Root Zone Processed: Mon Feb 8 15:38:13 2010

Top Level Domains (TLDs): 280

TLDs with IPv6 nameservers: 224
Percentage of TLDs with IPv6 nameservers: 80.0%

ac ad ae aero af ag al am an ao aq ar arpa as asia at au aw az ba be bg bi biz bj bm bn br bs bt bv bw by bz ca cat cd cf cg ch ci cl cm cn com cr cu cv cy cz de dk do dz edu ee eg er es et eu fi fj fm fr ga gb ge gg gh gi gl gn gp gr gs gt gu gw gy hk hn hr ht hu id ie il im in info int io ir is it je jm jo jp ke kg kh ki km kn kr kz la lb lc li lk lr ls lt lu lv ly ma mc md me mg mk ml mm mn mo mobi mr ms mt mu museum mv mw mx my mz na nc ne net ng nl no np nr nz om org pe pg ph pl pm pn pr ps pt py re ro rs ru rw sa sb sc sd se sg sh si sj sk sm sn so sv sz tc tel tf th tj tm tn to tp tr travel tt tw tz ua ug uk us uy va vc ve vg vi vn wf xn--0zwm56d xn--11b5bs3a9aj6g xn--80akhbyknj4f xn--9t4b11yi5a xn--deba0ad xn--g6w251d xn--hgbk6aj7f53bba xn--hlcj6aya9esc7a xn--jxalpdlp xn--kgbechtv xn--zckzah yt yu za zm zw

TLDs with nameservers with IPv6 glue in the root zone: 182
Percentage of TLDs that have nameservers with IPv6 glue in the root zone: 65.0%

ac ad ae aero af ag al am an ao aq ar arpa as asia at au az be bg bi biz bm br bt bw bz ca cat cd cf cg ch ci cl cn com cu cv cy cz de dk do dz edu ee eg es et eu fi fj fm fr ga gb ge gg gh gi gl gn gr gt gw gy hk hn ht hu id ie il im in info int io is it je jm jp ke kg kh ki km kn kr la lb lc li lk lr ls lt lu lv ly md me mk ml mn mo mobi mr ms mt museum mw mx my mz na net ng nl no np nr nz org ph pl pm pn ps pt py re ro rs rw sa sc se sg sh si sk sn so sz tel tf th tj tm tn tp travel tw tz ua ug uk us uy va vc ve vn wf xn--0zwm56d xn--11b5bs3a9aj6g xn--80akhbyknj4f xn--9t4b11yi5a xn--deba0ad xn--g6w251d xn--hgbk6aj7f53bba xn--hlcj6aya9esc7a xn--jxalpdlp xn--kgbechtv xn--zckzah yt yu za zm

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  84863025  73903871   1150872   1620612       475  (Mon Feb  8 01:11:03 2010)  (Mon Feb  8 08:53:14 2010)
      de  13155766  11570651      7639    398186       114  (Wed Jan 20 01:22:39 2010)  (Mon Feb  8 12:28:27 2010)
     net  12743053  10645016    139772    341374       726  (Mon Feb  8 01:12:06 2010)  (Mon Feb  8 09:26:33 2010)
     org   8028410   6880336     87215    222018       387  (Mon Feb  8 01:12:26 2010)  (Mon Feb  8 09:58:06 2010)
    info   5679334   4828131     71649    147506       185  (Mon Feb  8 01:12:39 2010)  (Mon Feb  8 10:17:20 2010)
     biz   2021564   1598652     21186     22180         0  (Mon Feb  8 01:13:52 2010)  (Mon Feb  8 10:39:26 2010)
      us   1550283   1257412     26995     14783         0  (Mon Feb  8 01:13:15 2010)  (Mon Feb  8 10:45:52 2010)
      ca   1330488   1137977      3892     15706         7  (Mon Feb  8 01:16:24 2010)  (Mon Feb  8 12:10:15 2010)
    mobi    940111    706854     31957      4347        32  (Mon Feb  8 01:12:48 2010)  (Mon Feb  8 10:30:03 2010)
      no    422532    299381       152      1383         3  (Fri Apr  3 02:10:44 2009)  (Mon Feb  8 14:09:35 2010)
    name    251680    182707      3404      4347         6  (Mon Feb  8 01:14:02 2010)  (Mon Feb  8 10:58:07 2010)
    asia    216974    147559      3331      1739        25  (Mon Feb  8 01:13:56 2010)  (Mon Feb  8 10:52:03 2010)
      sk    196900    149441     10456      3398         0  (Mon Feb  8 01:18:56 2010)  (Mon Feb  8 14:34:09 2010)
      kz     40502     27321         6     59345         0  (Mon Feb  8 01:18:27 2010)  (Mon Feb  8 13:37:26 2010)
    aero     31458      4580         8       301         0  (Mon Feb  8 01:12:43 2010)  (Mon Feb  8 10:23:41 2010)
      ma     31415     10575         5     33934         0  (Wed Dec  9 02:20:47 2009)  (Mon Feb  8 13:55:39 2010)
      am     26394      7391        45       550         4  (Mon Jul  6 01:58:16 2009)  (Mon Feb  8 11:19:20 2010)
      bg     21582     16360         9      1703        12  (Mon Feb  8 01:14:53 2010)  (Mon Feb  8 11:45:40 2010)
      tj     18416      4363         1       141         0  (Mon Feb  8 01:20:06 2010)  (Mon Feb  8 15:03:20 2010)
      ac     14956      9158         3       225         0  (Mon Feb  8 01:14:04 2010)  (Mon Feb  8 11:04:11 2010)
      ge     14505     12248         9       236         1  (Mon Feb  8 01:15:30 2010)  (Mon Feb  8 12:46:49 2010)
      ag     13631      9829        52       275         0  (Mon Feb  8 01:14:05 2010)  (Mon Feb  8 11:10:12 2010)
      to     13215     10349        36      1224         0  (Mon Feb  8 01:19:11 2010)  (Mon Feb  8 15:12:36 2010)
      tc      9956      7761        98       490         0  (Mon Feb  8 01:18:57 2010)  (Mon Feb  8 14:57:19 2010)
      ba      9132      7502         7      6753         0  (Mon Feb  8 01:16:50 2010)  (Mon Feb  8 11:33:13 2010)
      pe      8765      5463         2       177         0  (Mon Feb  8 01:18:20 2010)  (Mon Feb  8 14:15:38 2010)
      vg      8090      6016        61       326         0  (Mon Feb  8 01:19:21 2010)  (Mon Feb  8 15:29:11 2010)
      gt      7917      5681         4       478         2  (Mon Feb  8 01:15:42 2010)  (Mon Feb  8 13:05:21 2010)
      ec      6920      3705         5       133         0  (Mon Feb  8 01:15:19 2010)  (Mon Feb  8 12:34:41 2010)
      lk      6308      4001         1      5057         0  (Mon Feb  8 01:16:56 2010)  (Mon Feb  8 13:49:36 2010)
      sc      5446      4017         5       185         0  (Tue Aug 25 02:13:24 2009)  (Mon Feb  8 14:24:57 2010)
      jm      4883      2054         3      6604         0  (Mon Feb  8 01:16:54 2010)  (Mon Feb  8 13:22:09 2010)
     gov      4534      3581         4       861         0  (Mon Feb  8 01:15:36 2010)  (Mon Feb  8 12:56:14 2010)
      gl      3829      1740         3        18         0  (Mon Feb  8 01:15:32 2010)  (Mon Feb  8 12:49:59 2010)
      kg      3465      2644         2       242         0  (Mon Feb  8 01:16:41 2010)  (Mon Feb  8 13:28:18 2010)
      ug      3258      1955         1        75         0  (Mon Nov  9 02:12:10 2009)  (Mon Feb  8 15:23:11 2010)
      sh      2913      2272        10        94         1  (Mon Feb  8 01:18:44 2010)  (Mon Feb  8 14:28:06 2010)
      gd      2897      1496         1       238         0  (Mon Feb  8 01:15:29 2010)  (Mon Feb  8 12:40:46 2010)
      io      2830      2280         4        91         0  (Mon Feb  8 01:16:11 2010)  (Mon Feb  8 13:16:06 2010)
      sn      2441      1000         5       235         1  (Mon Feb  8 01:18:53 2010)  (Mon Feb  8 14:40:25 2010)
      lc      1604       450         1        40         0  (Mon Feb  8 01:16:54 2010)  (Mon Feb  8 13:43:30 2010)
      mw      1381       526         3         0         0  (Mon Feb  8 01:17:49 2010)  (Mon Feb  8 14:00:15 2010)
      jo      1381       950         1        40         0  (Mon Feb  8 01:17:26 2010)  (Mon Feb  8 13:25:12 2010)
      bd      1200       742         1      2002         0  (Mon Feb  8 01:14:15 2010)  (Mon Feb  8 11:39:35 2010)
      sl       953       574         1        17         0  (Mon Feb  8 01:18:47 2010)  (Mon Feb  8 14:37:16 2010)
      cu       859       231         0       650         9  (Mon Feb  8 01:15:03 2010)  (Mon Feb  8 12:17:57 2010)
      bb       766       425         4         0         0  (Mon Feb  8 01:14:11 2010)  (Mon Feb  8 11:36:17 2010)
      nf       722       512         5        12         0  (Mon Feb  8 01:17:53 2010)  (Mon Feb  8 14:03:32 2010)
      cv       557       327         1        72         0  (Mon Feb  8 01:14:58 2010)  (Mon Feb  8 12:21:00 2010)
      ao       238       115         1       130         0  (Mon Feb  8 01:14:06 2010)  (Mon Feb  8 11:24:10 2010)
     int       148        84         1        65         0  (Mon Feb  8 01:16:11 2010)  (Mon Feb  8 13:10:02 2010)
      ne        89        31         1        69         0  (Mon Feb  8 01:17:51 2010)  (Mon Feb  8 14:00:24 2010)
      tn        53         5         0       764         2  (Mon Feb  8 01:19:08 2010)  (Mon Feb  8 15:06:35 2010)
      au        20         1         0        27         4  (Fri Apr  3 01:55:15 2009)  (Mon Feb  8 11:24:10 2010)

   total 131729749 113488303   1558930   2921458      1996

Total registered domains with AAAA records: 1558930

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: Fri Feb 5 19:30:34 2010
Top 1000 Processed: Mon Feb 8 15:47:16 2010

Top 1000 Usenet Servers: 1000
Top 1000 Usenet Servers with a direct IPv4 address: 721
Top 1000 Usenet Servers with a direct IPv6 address: 79
Percentage of top 1000 Usenet Servers with direct addresses with IPv6 support: 10.96%

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: Mon Feb 8 00:11:32 PST 2010

IPv4 ASes: 33657

IPv6 ASes: 1946

ASes using only IPv4: 31769

ASes using only IPv6: 58

ASes using IPv4 and IPv6: 1888

ASes using IPv4 or IPv6: 33715

Percentage of ASes (IPv4 or IPv6) running IPv6: 5.8%

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: Mon Feb 8 02:28:47 PST 2010

IPv6 Prefixes: 2418

IPv6 rDNS Nameservers: 2443

IPv6 rDNS Nameservers with an IPv4 address: 2389

IPv6 rDNS Nameservers with an IPv6 address: 924

IPv6 rDNS Nameservers reachable via IPv4 (ping or dns): 2067

IPv6 rDNS Nameservers reachable via IPv6 (ping or dns): 775

IPv6 rDNS Nameservers reachable via IPv4 or IPv6: 2151

IPv6 rDNS Nameservers reachable via IPv4 and IPv6: 691

Percentage reachable IPv6 rDNS Nameservers reachable via IPv6: 36.0%

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): 389

IPv6 rDNS Nameservers where IPv4 and IPv6 are the same speed (within 1ms): 101

IPv6 rDNS Nameservers where IPv4 is faster than IPv6 (by more than 1ms): 201

IPv6 rDNS nameservers where IPv6 is as fast or faster than IPv4 (within 1ms): 490

Percentage of IPv6 rDNS Nameservers where IPv6 is as fast or faster than IPv4 (within 1ms): 70.9%

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: Mon Feb 8 00:11:43 2010
Alexa Top 1 Million Domains Processed: Mon Feb 8 00:49:28 2010

Alexa 1M raw domains: 1000000
Alexa 1M raw with a direct IPv4 address: 923575
Alexa 1M raw with a direct IPv6 address: 1450

(top 50)
google.ca 2001:4860:8004::68
softlayer.com 2607:f0d0:1000:11:1::2
cyberciti.biz 2607:f0d0:1002:11::4
tribune.com 2002:a3c0:1712::a3c0:1712
internic.net 2620:0:2d0:200::9
freebsd.org 2001:4f8:fff6::28
ripe.net 2001:610:240:22::c100:68b
ucla.edu 2607:f010:3fe:201:101d:9ff:fe32:adee
leaseweb.com 2001:1af8:3100:1:214:22ff:fe1e:d380
nyaatorrents.org 2002:53e9:a52a::832:3316:5042
arin.net 2001:500:4:13::81
geenstijl.nl 2a00:d00:ff:131:94:228:131:131
kenengba.com 2001:470:1f04:8c1::2
monash.edu.au 2001:388:608c:c91::117
koreus.com 2001:41d0:2:4133::1
filezilla-project.org 2a01:198:200:5b7::2
python.org 2001:888:2000:d::a2
spitsnieuws.nl 2a00:d00:ff:131:94:228:131:131
torrentfreak.com 2607:f128:40::174
google.com.kw 2001:4860:8005::63
kino.de 2001:a60:9003:a000::b003
fedoraproject.org 2610:28:200:1::fed0:1
animesuki.com 2001:4d88:ffff:ffff:30:524:ac23:2
servage.net 2a01:3b0:1:1::1:a
icann.org 2620:0:2d0:200::7
itb.ac.id 2001:d30:3::22
truecompanion.com 2001:470:1:48::d8da:b883
keenspot.com 2001:470:1:3a::13
comicgenesis.com 2001:470:1:3a::14
sify.com 2001:e48:0:10::10
weeronline.nl 2001:888:30af::206:85
he.net 2001:470:0:76::2
infomaniak.ch 2001:1600:3:7::101
zoover.nl 2001:888:30af::206:81
maxconsole.net 2a00:d00:ff:131:94:228:131:131
exchangecash.de 447f:0:4b51:e8:447f:0:5151:e8
ietf.org 2001:1890:1112:1::20
mediabiz.de 2001:a60:9003:a000::b00c
bt-chat.com 2001:470:b040:20::1
steadfast.net 2607:f128::2
proua.com 2a01:d0::10:1
456bereastreet.com 2a02:750:0:501::101
torrentbits.ro 2001:4d18:0:1::32
ubuntu.ru 2001:780:0:25:206:5bff:fe04:8bcb
bumptop.com 2607:f590:0:ffff::3d
pastebin.ca 2610:1e8:2:20::e8b8:97
debian-administration.org 2001:41c8:10:62::1
www.gov.hk 2406:0:6a:8001::200a
cbn.net.id 2001:d10:2:80::80
pcc.edu 192:192:168:168:1:1:1:1

www. + Alexa 1M domains: 1000000
www. + Alexa 1M with a direct IPv4 address: 969244
www. + Alexa 1M with a direct IPv6 address: 1978

(top 50)
www.softlayer.com 2607:f0d0:1000:11:1::1
www.google.az 2001:4860:8005::93
www.ucla.edu 2607:f010:3fe:301:101d:9ff:fe32:a7db
www.cyberciti.biz 2607:f0d0:1002:11::4
www.sakura.ne.jp 2001:e40:100:407::d2e0:ac35
www.doctissimo.fr 2a01:7b0:2:3::26
www.internic.net 2620:0:2d0:200::9
www.ripe.net 2001:610:240:22::c100:68b
www.dti.ne.jp 2001:2e8:22:13::103
www.kddi.com 2001:268:fd01::1
www.odn.ne.jp 2001:278:0:1106::4
www.lokalisten.de 2001:608:0:1008::46
www.nyaatorrents.org 2002:53e9:a52a::832:3316:5042
www.monash.edu.au 2001:388:608c:c91::117
www.geenstijl.nl 2a00:d00:ff:131:94:228:131:131
www.free.fr 2a01:e0c:1:1599::1
www.arin.net 2001:500:4:13::81
www.python.org 2001:888:2000:d::a2
www.torrentfreak.com 2607:f128:40::174
www.kenengba.com 2001:470:1f04:8c1::2
www.kino.de 2001:a60:9003:a000::b003
www.gamershell.com 2a00:d00:ff:131:94:228:131:131
www.icann.org 2620:0:2d0:200::7
www.keenspot.com 2001:470:1:3a::13
www.hentai-foundry.com 2607:f0d0:1003:c::30
www.truecompanion.com 2001:470:1:48::d8da:b883
www.nnm-club.ru 2001:470:1f0a:1505::2
www.iastate.edu 2610:130:101:102::f0
www.spele.nl 2a00:f80::10
www.fedoraproject.org 2610:28:200:1::fed0:2
www.bt-chat.com 2001:470:b040:20::1
www.ulaval.ca 2620:0:1af0:144:ffff::fff2
www.univie.ac.at 2001:62a:4:1::80:108
www.hitachi.co.jp 2001:240:400::8591:e013
www.koreus.com 2001:41d0:2:4136::1
www.google.ci 2001:4860:8005::6a
www.cnnic.cn 2001:dc7:1::daf1:6129
www.spitsnieuws.nl 2a00:d00:ff:131:94:228:131:131
www.servage.net 2a01:3b0:1:1::1:a
www.k12.pa.us 2001:5e8:0:1000::fc
www.fudan.edu.cn 2001:da8:8001:2:21e:c9ff:feb5:eace
www.rmc.fr 2001:41d0:1:7b20::1
www.auone-net.jp 2001:268:fd02::8
www.weeronline.nl 2001:888:30af::206:86
www.01net.com 2001:41d0:1:148::1
www.t7online.com 2a01:198:540:1:f0d4:82d9:200:3
www.maxconsole.net 2a00:d00:ff:131:94:228:131:131
www.google.sn 2001:4860:8004::68
www.he.net 2001:470:0:76::2
www.iana.org 2620:0:2d0:1::193

ipv6. + Alexa 1M domains: 1000000
ipv6. + Alexa 1M with a direct IPv4 address: 241103
ipv6. + Alexa 1M with a direct IPv6 address: 1081

(top 50)
ipv6.comcast.net 2001:558:1002:5:68:87:64:59
ipv6.netflix.com 2620:0:ef0:13::20
ipv6.google.com 2001:4860:b006::67
ipv6.google.co.jp 2001:4860:b006::63
ipv6.2ch.net 2407:3000:6:175::12
ipv6.google.cn 2401:3800:c001::68
ipv6.scribd.com 2607:f0d0:1004:2::2
ipv6.berkeley.edu 2607:f140:ffff:ffff::80
ipv6.seznam.cz 2a02:598:1::101
ipv6.iwiw.hu 2001:4c48:2:a::1
ipv6.novinky.cz 2a02:598:1::106
ipv6.sony.co.jp 2001:cf8:0:6b::190
ipv6.gazeta.pl 2a02:bd8:1::50fc:91
ipv6.freemail.hu 2001:4c48:2:f::100
ipv6.21cn.com 2042:8800:1::3
ipv6.bt.com 2002:c171:3a71::1
ipv6.lide.cz 2a02:598:1::103
ipv6.denic.de 2001:608:6::1
ipv6.pku.edu.cn 2001:da8:201:1129:203:baff:fe2f:163c
ipv6.nyaatorrents.org 2002:53e9:a52a::832:3316:5042
ipv6.df.eu 2a00:1158:0:100::3
ipv6.dyndns.com 2607:f590:0:ffff::29
ipv6.tokyotosho.info 2001:470:dc56:b00::25:1
ipv6.sjtu.edu.cn 2001:da8:8000:1::80
ipv6.vt.edu 2001:468:c80:210f:0:1c6:1a85:8564
ipv6.monash.edu.au 2001:388:608c:c91::117
ipv6.weeronline.nl 2001:888:30af::206:85
ipv6.podnapisi.net 2a02:840:1:2:117::1
ipv6.afraid.org 2001:470:d19b::203
ipv6.ovh.com 2001:41d0:1:10::d5ba:2122
ipv6.gatech.edu 2001:468:300:ee01:a00:2bff:fec4:4e8e
ipv6.spoluzaci.cz 2a02:598:1::102
ipv6.italiansubs.net 2001:41d0:1:8364::1
ipv6.peta.org 2001:4978:f:36f::2
ipv6.uk.to 3ffe:2c03:120:c1f3:baba::5
ipv6.spele.nl 2a00:f80::10
ipv6.unm.edu 3ffe:2900:11:10::1
ipv6.gsa.gov 2620:0:150:ffad::5
ipv6.hopto.org 2001:470:8:145::1
ipv6.trueinternet.co.th 2001:fb0:100:1:58:97:5:30
ipv6.nnm-club.ru 2001:470:1f0a:1505::2
ipv6.fudan.edu.cn 2001:da8:8001:108:211:43ff:fecd:f734
ipv6.sidn.nl 2a00:d78:0:fd:217:a4ff:fe8d:f4b2
ipv6.comicgenesis.com 2001:470:1:3a::14
ipv6.lsu.edu 2620:0:da0:f001::7
ipv6.infomaniak.ch 2001:1600::ffff
ipv6.finviz.com 2001:1ba0:2a0:5965:0:30:35:1
ipv6.ustc.edu.cn 2001:da8:d800::66
ipv6.zoover.nl 2001:888:30af::206:82
ipv6.ku.ac.th 2001:3c8:1303:1125::18