Check that www.top-ix.org exists for IPv4 in case we have a typo on the domain name. Use dig to query the local name server (::1).


; <<>> DiG 9.4.1-P1 <<>> +trace +all top-ix.org soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1821
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			163899	IN	NS	d.root-servers.net.
.			163899	IN	NS	c.root-servers.net.
.			163899	IN	NS	g.root-servers.net.
.			163899	IN	NS	i.root-servers.net.
.			163899	IN	NS	a.root-servers.net.
.			163899	IN	NS	h.root-servers.net.
.			163899	IN	NS	b.root-servers.net.
.			163899	IN	NS	m.root-servers.net.
.			163899	IN	NS	f.root-servers.net.
.			163899	IN	NS	e.root-servers.net.
.			163899	IN	NS	j.root-servers.net.
.			163899	IN	NS	k.root-servers.net.
.			163899	IN	NS	l.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	33222	IN	A	198.41.0.4
a.root-servers.net.	33222	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	509887	IN	A	192.228.79.201
c.root-servers.net.	379270	IN	A	192.33.4.12
d.root-servers.net.	337619	IN	A	128.8.10.90
d.root-servers.net.	337619	IN	AAAA	2001:500:2d::d
e.root-servers.net.	509887	IN	A	192.203.230.10
f.root-servers.net.	34093	IN	A	192.5.5.241
f.root-servers.net.	338969	IN	AAAA	2001:500:2f::f
g.root-servers.net.	34757	IN	A	192.112.36.4
h.root-servers.net.	596608	IN	A	128.63.2.53
h.root-servers.net.	596608	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	33329	IN	A	192.36.148.17
i.root-servers.net.	33329	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed May 23 04:46:22 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1142
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 12

;; QUESTION SECTION:
;top-ix.org.			IN	SOA

;; AUTHORITY SECTION:
org.			172800	IN	NS	a0.org.afilias-nst.info.
org.			172800	IN	NS	a2.org.afilias-nst.info.
org.			172800	IN	NS	b0.org.afilias-nst.org.
org.			172800	IN	NS	b2.org.afilias-nst.org.
org.			172800	IN	NS	c0.org.afilias-nst.info.
org.			172800	IN	NS	d0.org.afilias-nst.org.

;; ADDITIONAL SECTION:
a0.org.afilias-nst.info. 172800	IN	A	199.19.56.1
a2.org.afilias-nst.info. 172800	IN	A	199.249.112.1
b0.org.afilias-nst.org.	172800	IN	A	199.19.54.1
b2.org.afilias-nst.org.	172800	IN	A	199.249.120.1
c0.org.afilias-nst.info. 172800	IN	A	199.19.53.1
d0.org.afilias-nst.org.	172800	IN	A	199.19.57.1
a0.org.afilias-nst.info. 172800	IN	AAAA	2001:500:e::1
a2.org.afilias-nst.info. 172800	IN	AAAA	2001:500:40::1
b0.org.afilias-nst.org.	172800	IN	AAAA	2001:500:c::1
b2.org.afilias-nst.org.	172800	IN	AAAA	2001:500:48::1
c0.org.afilias-nst.info. 172800	IN	AAAA	2001:500:b::1
d0.org.afilias-nst.org.	172800	IN	AAAA	2001:500:f::1

;; Query time: 38 msec
;; SERVER: 2001:7fd::1#53(k.root-servers.net)
;; WHEN: Wed May 23 04:46:22 2012
;; MSG SIZE  rcvd: 430

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1070
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;top-ix.org.			IN	SOA

;; AUTHORITY SECTION:
top-ix.org.		86400	IN	NS	dns1.topix.it.
top-ix.org.		86400	IN	NS	dns2.csi.it.

;; Query time: 293 msec
;; SERVER: 2001:500:b::1#53(c0.org.afilias-nst.info)
;; WHEN: Wed May 23 04:46:23 2012
;; MSG SIZE  rcvd: 78

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 569
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;top-ix.org.			IN	SOA

;; ANSWER SECTION:
top-ix.org.		86400	IN	SOA	dns1.topix.it. postmaster.topix.it. 2012052201 28800 7200 604800 86400

;; AUTHORITY SECTION:
top-ix.org.		86400	IN	NS	dns1.topix.it.
top-ix.org.		86400	IN	NS	dns2.csi.it.

;; ADDITIONAL SECTION:
dns1.topix.it.		86400	IN	A	194.116.122.2
dns2.csi.it.		3600	IN	A	158.102.161.191

;; Query time: 315 msec
;; SERVER: 158.102.161.191#53(dns2.csi.it)
;; WHEN: Wed May 23 04:46:24 2012
;; MSG SIZE  rcvd: 157

HTTP

Looking for CNAME of www.top-ix.org
Checking if there is a AAAA for www.top-ix.org ... success.
Sending...

HEAD / HTTP/1.1
Host: www.top-ix.org
User-Agent: ipv6-survey.pl/1.97 http://www.mrp.net/IPv6_Survey.html

Reading ...

HTTP/1.1 200 OK
Date: Tue, 22 May 2012 19:16:25 GMT
Server: Apache/2.2.8 (Ubuntu) PHP/5.2.4-2ubuntu5.14 with Suhosin-Patch
X-Powered-By: PHP/5.2.4-2ubuntu5.14
Set-Cookie: qtrans_cookie_test=qTranslate+Cookie+Test; path=/; domain=www.top-ix.org
X-Pingback: http://www.top-ix.org/xmlrpc.php
Vary: Accept-Encoding
Content-Type: text/html; charset=UTF-8

Accessed / [2001:7f8:23:33e:0:0:0:8e] Response: HTTP/1.1 200 OK

SMTP

MX 1 aspmx.l.google.com
Looking for AAAA on ASPMX.L.GOOGLE.COM
MX 1 alt1.aspmx.l.google.com
Looking for AAAA on ALT1.ASPMX.L.GOOGLE.COM
MX 1 alt2.aspmx.l.google.com
Looking for AAAA on ALT2.ASPMX.L.GOOGLE.COM
MX 1 aspmx2.googlemail.com
Looking for AAAA on ASPMX2.GOOGLEMAIL.COM
MX 1 aspmx3.googlemail.com
Looking for AAAA on ASPMX3.GOOGLEMAIL.COM
MX 1 aspmx4.googlemail.com
Looking for AAAA on ASPMX4.GOOGLEMAIL.COM
MX 1 aspmx5.googlemail.com
Looking for AAAA on ASPMX5.GOOGLEMAIL.COM

DNS

Looking for AAAA of NS dns2.csi.it
No AAAA record for dns2.csi.it
Looking for AAAA of NS dns1.topix.it
No AAAA record for dns1.topix.it

NTP

Looking for an A record for ntp.top-ix.org
Looking for an A record for clock.top-ix.org
Looking for an A record for time.top-ix.org
Looking for an A record for chime.top-ix.org

XMPP

Looking for a SRV record for _xmpp-client._tcp.top-ix.org
Looking for a SRV record for _xmpp-server._tcp.top-ix.org

Last Updated: Tue May 22 19:16:29 2012 UTC