Check that www.cam.ac.uk 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 cam.ac.uk soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 403
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			25780	IN	NS	m.root-servers.net.
.			25780	IN	NS	f.root-servers.net.
.			25780	IN	NS	l.root-servers.net.
.			25780	IN	NS	a.root-servers.net.
.			25780	IN	NS	d.root-servers.net.
.			25780	IN	NS	g.root-servers.net.
.			25780	IN	NS	i.root-servers.net.
.			25780	IN	NS	k.root-servers.net.
.			25780	IN	NS	c.root-servers.net.
.			25780	IN	NS	h.root-servers.net.
.			25780	IN	NS	e.root-servers.net.
.			25780	IN	NS	j.root-servers.net.
.			25780	IN	NS	b.root-servers.net.

;; ADDITIONAL SECTION:
k.root-servers.net.	515298	IN	A	193.0.14.129
k.root-servers.net.	515298	IN	AAAA	2001:7fd::1
a.root-servers.net.	513772	IN	A	198.41.0.4
a.root-servers.net.	513772	IN	AAAA	2001:503:ba3e::2:30
c.root-servers.net.	214430	IN	A	192.33.4.12
d.root-servers.net.	210984	IN	A	128.8.10.90
d.root-servers.net.	210984	IN	AAAA	2001:500:2d::d
j.root-servers.net.	126042	IN	A	192.58.128.30
j.root-servers.net.	126042	IN	AAAA	2001:503:c27::2:30
b.root-servers.net.	472036	IN	A	192.228.79.201
e.root-servers.net.	469356	IN	A	192.203.230.10
i.root-servers.net.	513879	IN	A	192.36.148.17
i.root-servers.net.	513879	IN	AAAA	2001:7fe::53
f.root-servers.net.	514643	IN	A	192.5.5.241

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu May 17 15:17:12 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1970
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 11, ADDITIONAL: 14

;; QUESTION SECTION:
;cam.ac.uk.			IN	SOA

;; AUTHORITY SECTION:
uk.			172800	IN	NS	nsc.nic.uk.
uk.			172800	IN	NS	ns4.nic.uk.
uk.			172800	IN	NS	nsd.nic.uk.
uk.			172800	IN	NS	ns2.nic.uk.
uk.			172800	IN	NS	nsb.nic.uk.
uk.			172800	IN	NS	ns3.nic.uk.
uk.			172800	IN	NS	nsa.nic.uk.
uk.			172800	IN	NS	ns5.nic.uk.
uk.			172800	IN	NS	ns7.nic.uk.
uk.			172800	IN	NS	ns6.nic.uk.
uk.			172800	IN	NS	ns1.nic.uk.

;; ADDITIONAL SECTION:
ns1.nic.uk.		172800	IN	A	195.66.240.130
ns1.nic.uk.		172800	IN	AAAA	2a01:40:1001:35::2
ns2.nic.uk.		172800	IN	A	217.79.164.131
ns3.nic.uk.		172800	IN	A	213.219.13.131
ns4.nic.uk.		172800	IN	A	194.83.244.131
ns4.nic.uk.		172800	IN	AAAA	2001:630:181:35::83
ns5.nic.uk.		172800	IN	A	213.246.167.131
ns6.nic.uk.		172800	IN	A	213.248.254.130
ns7.nic.uk.		172800	IN	A	212.121.40.130
nsa.nic.uk.		172800	IN	A	156.154.100.3
nsa.nic.uk.		172800	IN	AAAA	2001:502:ad09::3
nsb.nic.uk.		172800	IN	A	156.154.101.3
nsc.nic.uk.		172800	IN	A	156.154.102.3
nsd.nic.uk.		172800	IN	A	156.154.103.3

;; Query time: 186 msec
;; SERVER: 192.33.4.12#53(c.root-servers.net)
;; WHEN: Thu May 17 15:17:12 2012
;; MSG SIZE  rcvd: 489

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1612
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 7, ADDITIONAL: 0

;; QUESTION SECTION:
;cam.ac.uk.			IN	SOA

;; AUTHORITY SECTION:
ac.uk.			172800	IN	NS	auth03.ns.uu.net.
ac.uk.			172800	IN	NS	ns2.ja.net.
ac.uk.			172800	IN	NS	ns4.ja.net.
ac.uk.			172800	IN	NS	ns1.surfnet.nl.
ac.uk.			172800	IN	NS	ns0.ja.net.
ac.uk.			172800	IN	NS	ns3.ja.net.
ac.uk.			172800	IN	NS	ws-fra1.win-ip.dfn.de.

;; Query time: 325 msec
;; SERVER: 213.248.254.130#53(ns6.nic.uk)
;; WHEN: Thu May 17 15:17:12 2012
;; MSG SIZE  rcvd: 195

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 824
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 7, ADDITIONAL: 8

;; QUESTION SECTION:
;cam.ac.uk.			IN	SOA

;; AUTHORITY SECTION:
cam.ac.uk.		86400	IN	NS	authdns0.csx.cam.ac.uk.
cam.ac.uk.		86400	IN	NS	ns2.ic.ac.uk.
cam.ac.uk.		86400	IN	NS	dns0.cl.cam.ac.uk.
cam.ac.uk.		86400	IN	NS	dns0.eng.cam.ac.uk.
cam.ac.uk.		86400	IN	NS	authdns1.csx.cam.ac.uk.
cam.ac.uk.		86400	IN	NS	bitsy.mit.edu.
cam.ac.uk.		86400	IN	NS	dns1.cl.cam.ac.uk.

;; ADDITIONAL SECTION:
ns2.ic.ac.uk.		86400	IN	A	155.198.142.82
dns0.cl.cam.ac.uk.	86400	IN	A	128.232.0.19
dns0.eng.cam.ac.uk.	86400	IN	A	129.169.8.8
dns1.cl.cam.ac.uk.	86400	IN	A	128.232.0.18
authdns0.csx.cam.ac.uk.	86400	IN	A	131.111.8.37
authdns0.csx.cam.ac.uk.	86400	IN	AAAA	2001:630:212:8::d:a0
authdns1.csx.cam.ac.uk.	86400	IN	A	131.111.12.37
authdns1.csx.cam.ac.uk.	86400	IN	AAAA	2001:630:212:12::d:a1

;; Query time: 325 msec
;; SERVER: 2001:610:1:800a:192:87:106:101#53(ns1.surfnet.nl)
;; WHEN: Thu May 17 15:17:13 2012
;; MSG SIZE  rcvd: 341

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1830
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 7, ADDITIONAL: 9

;; QUESTION SECTION:
;cam.ac.uk.			IN	SOA

;; ANSWER SECTION:
cam.ac.uk.		86400	IN	SOA	authdns0.csx.cam.ac.uk. hostmaster.ucs.cam.ac.uk. 1337198350 14400 3600 604800 14400

;; AUTHORITY SECTION:
cam.ac.uk.		86400	IN	NS	bitsy.mit.edu.
cam.ac.uk.		86400	IN	NS	authdns1.csx.cam.ac.uk.
cam.ac.uk.		86400	IN	NS	ns2.ic.ac.uk.
cam.ac.uk.		86400	IN	NS	authdns0.csx.cam.ac.uk.
cam.ac.uk.		86400	IN	NS	dns0.eng.cam.ac.uk.
cam.ac.uk.		86400	IN	NS	dns0.cl.cam.ac.uk.
cam.ac.uk.		86400	IN	NS	dns1.cl.cam.ac.uk.

;; ADDITIONAL SECTION:
ns2.ic.ac.uk.		86400	IN	A	155.198.142.82
dns0.cl.cam.ac.uk.	21600	IN	A	128.232.0.19
dns0.cl.cam.ac.uk.	21600	IN	AAAA	2001:630:212:267::d:a0
dns0.eng.cam.ac.uk.	86400	IN	A	129.169.8.8
dns1.cl.cam.ac.uk.	21600	IN	A	128.232.0.18
authdns0.csx.cam.ac.uk.	86400	IN	A	131.111.8.37
authdns0.csx.cam.ac.uk.	86400	IN	AAAA	2001:630:212:8::d:a0
authdns1.csx.cam.ac.uk.	86400	IN	A	131.111.12.37
authdns1.csx.cam.ac.uk.	86400	IN	AAAA	2001:630:212:12::d:a1

;; Query time: 314 msec
;; SERVER: 155.198.142.82#53(ns2.ic.ac.uk)
;; WHEN: Thu May 17 15:17:13 2012
;; MSG SIZE  rcvd: 420

HTTP

Looking for CNAME of www.cam.ac.uk
Checking if there is a AAAA for www.cam.ac.uk ... FAILED.


; <<>> DiG 9.4.1-P1 <<>> www.cam.ac.uk aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 128
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.cam.ac.uk.			IN	AAAA

;; AUTHORITY SECTION:
cam.ac.uk.		10800	IN	SOA	authdns0.csx.cam.ac.uk. hostmaster.ucs.cam.ac.uk. 1337198350 14400 3600 604800 14400

;; Query time: 4 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu May 17 15:17:15 2012
;; MSG SIZE  rcvd: 95

Checking other options ... failed too.

SMTP

MX 7 mx.cam.ac.uk
Looking for AAAA on mx.cam.ac.uk

DNS

Looking for AAAA of NS dns1.cl.cam.ac.uk
No AAAA record for dns1.cl.cam.ac.uk
Looking for AAAA of NS dns0.eng.cam.ac.uk
No AAAA record for dns0.eng.cam.ac.uk
Looking for AAAA of NS ns2.ic.ac.uk
No AAAA record for ns2.ic.ac.uk
Looking for AAAA of NS authdns1.csx.cam.ac.uk
Querying 2001:630:212:12:0:0:d:a1 for SOA of cam.ac.uk over IPv6 ... successful!
Looking for AAAA of NS dns0.cl.cam.ac.uk
Querying 2001:630:212:267:0:0:d:a0 for SOA of cam.ac.uk over IPv6 ... successful!
Looking for AAAA of NS authdns0.csx.cam.ac.uk
Querying 2001:630:212:8:0:0:d:a0 for SOA of cam.ac.uk over IPv6 ... successful!
Looking for AAAA of NS bitsy.mit.edu
No AAAA record for bitsy.mit.edu

NTP

Looking for an A record for ntp.cam.ac.uk
Looking for an A record for clock.cam.ac.uk
Looking for an A record for time.cam.ac.uk
Looking for an A record for chime.cam.ac.uk

XMPP

Looking for a SRV record for _xmpp-client._tcp.cam.ac.uk
Looking for a SRV record for _xmpp-server._tcp.cam.ac.uk

Last Updated: Thu May 17 05:47:22 2012 UTC