Check that www.nix.cz 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 nix.cz soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1593
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			292395	IN	NS	d.root-servers.net.
.			292395	IN	NS	i.root-servers.net.
.			292395	IN	NS	f.root-servers.net.
.			292395	IN	NS	e.root-servers.net.
.			292395	IN	NS	a.root-servers.net.
.			292395	IN	NS	b.root-servers.net.
.			292395	IN	NS	j.root-servers.net.
.			292395	IN	NS	c.root-servers.net.
.			292395	IN	NS	k.root-servers.net.
.			292395	IN	NS	h.root-servers.net.
.			292395	IN	NS	m.root-servers.net.
.			292395	IN	NS	l.root-servers.net.
.			292395	IN	NS	g.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	161718	IN	A	198.41.0.4
a.root-servers.net.	161718	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	119982	IN	A	192.228.79.201
c.root-servers.net.	507766	IN	A	192.33.4.12
d.root-servers.net.	466115	IN	A	128.8.10.90
d.root-servers.net.	466115	IN	AAAA	2001:500:2d::d
e.root-servers.net.	117302	IN	A	192.203.230.10
f.root-servers.net.	162589	IN	A	192.5.5.241
f.root-servers.net.	467465	IN	AAAA	2001:500:2f::f
g.root-servers.net.	163253	IN	A	192.112.36.4
h.root-servers.net.	120291	IN	A	128.63.2.53
h.root-servers.net.	120291	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	161825	IN	A	192.36.148.17
i.root-servers.net.	161825	IN	AAAA	2001:7fe::53

;; Query time: 8 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon May 21 17:04:46 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 881
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 10

;; QUESTION SECTION:
;nix.cz.				IN	SOA

;; AUTHORITY SECTION:
cz.			172800	IN	NS	b.ns.nic.cz.
cz.			172800	IN	NS	a.ns.nic.cz.
cz.			172800	IN	NS	d.ns.nic.cz.
cz.			172800	IN	NS	c.ns.nic.cz.
cz.			172800	IN	NS	f.ns.nic.cz.

;; ADDITIONAL SECTION:
a.ns.nic.cz.		172800	IN	A	194.0.12.1
b.ns.nic.cz.		172800	IN	A	194.0.13.1
c.ns.nic.cz.		172800	IN	A	194.0.14.1
d.ns.nic.cz.		172800	IN	A	193.29.206.1
f.ns.nic.cz.		172800	IN	A	193.171.255.48
a.ns.nic.cz.		172800	IN	AAAA	2001:678:f::1
b.ns.nic.cz.		172800	IN	AAAA	2001:678:10::1
c.ns.nic.cz.		172800	IN	AAAA	2001:678:11::1
d.ns.nic.cz.		172800	IN	AAAA	2001:678:1::1
f.ns.nic.cz.		172800	IN	AAAA	2001:628:453:420::48

;; Query time: 43 msec
;; SERVER: 2001:500:2f::f#53(f.root-servers.net)
;; WHEN: Mon May 21 17:04:46 2012
;; MSG SIZE  rcvd: 331

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 315
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 3, ADDITIONAL: 4

;; QUESTION SECTION:
;nix.cz.				IN	SOA

;; AUTHORITY SECTION:
nix.cz.			18000	IN	NS	ns2.ignum.cz.
nix.cz.			18000	IN	NS	ns1.nixcz.org.
nix.cz.			18000	IN	NS	info.nix.cz.

;; ADDITIONAL SECTION:
ns2.ignum.cz.		18000	IN	A	217.31.48.201
ns2.ignum.cz.		18000	IN	AAAA	2001:1ab0:7e1e:2::5
info.nix.cz.		18000	IN	A	195.47.235.3
info.nix.cz.		18000	IN	AAAA	2a02:38::1001

;; Query time: 698 msec
;; SERVER: 2001:678:1::1#53(d.ns.nic.cz)
;; WHEN: Mon May 21 17:04:47 2012
;; MSG SIZE  rcvd: 182

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 238
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 2

;; QUESTION SECTION:
;nix.cz.				IN	SOA

;; ANSWER SECTION:
nix.cz.			21600	IN	SOA	ns1.nixcz.org. noc.nix.cz. 2012051501 28800 7200 2419200 10800

;; AUTHORITY SECTION:
nix.cz.			21600	IN	NS	ns1.nixcz.org.
nix.cz.			21600	IN	NS	ns2.ignum.cz.
nix.cz.			21600	IN	NS	info.nix.cz.

;; ADDITIONAL SECTION:
info.nix.cz.		21600	IN	A	195.47.235.3
info.nix.cz.		21600	IN	AAAA	2a02:38::1001

;; Query time: 675 msec
;; SERVER: 2a02:38::1001#53(info.nix.cz)
;; WHEN: Mon May 21 17:04:49 2012
;; MSG SIZE  rcvd: 178

HTTP

Looking for CNAME of www.nix.cz
Checking if there is a AAAA for www.nix.cz ... success.
Sending...

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

Reading ...

HTTP/1.1 200 OK
Date: Mon, 21 May 2012 07:34:50 GMT
Server: Apache
X-Powered-By: PHP/5.2.6-1+lenny13
Content-Type: text/html; charset=utf-8

Accessed / [2a02:38:0:0:0:0:0:1001] Response: HTTP/1.1 200 OK

SMTP

MX 10 mail.nix.cz
Looking for AAAA on mail.nix.cz
Connecting to 2a02:38:0:0:0:0:0:1002 ... done.
220 mail.nix.cz ESMTP
250-mail.nix.cz
250-PIPELINING
250-SIZE 40960000
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
MX 10 ns1.nix.cz
Looking for AAAA on ns1.nix.cz

DNS

Looking for AAAA of NS ns1.nixcz.org
Querying 2a02:38:0:0:0:0:0:1003 for SOA of nix.cz over IPv6 ... successful!
Looking for AAAA of NS info.nix.cz
Querying 2a02:38:0:0:0:0:0:1001 for SOA of nix.cz over IPv6 ... successful!
Looking for AAAA of NS ns2.ignum.cz
Querying 2001:1ab0:7e1e:2:0:0:0:5 for SOA of nix.cz over IPv6 ... successful!

NTP

Looking for an A record for ntp.nix.cz
Looking for an A record for clock.nix.cz
Looking for an A record for time.nix.cz
Looking for an A record for chime.nix.cz

XMPP

Looking for a SRV record for _xmpp-client._tcp.nix.cz
Looking for a SRV record for _xmpp-server._tcp.nix.cz

Last Updated: Mon May 21 07:34:56 2012 UTC