Check that www.columbia.edu 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 columbia.edu soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 178
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; AUTHORITY SECTION:
.			3600000	IN	NS	B.ROOT-SERVERS.NET.
.			3600000	IN	NS	D.ROOT-SERVERS.NET.
.			3600000	IN	NS	J.ROOT-SERVERS.NET.
.			3600000	IN	NS	C.ROOT-SERVERS.NET.
.			3600000	IN	NS	M.ROOT-SERVERS.NET.
.			3600000	IN	NS	F.ROOT-SERVERS.NET.
.			3600000	IN	NS	K.ROOT-SERVERS.NET.
.			3600000	IN	NS	I.ROOT-SERVERS.NET.
.			3600000	IN	NS	H.ROOT-SERVERS.NET.
.			3600000	IN	NS	A.ROOT-SERVERS.NET.
.			3600000	IN	NS	L.ROOT-SERVERS.NET.
.			3600000	IN	NS	G.ROOT-SERVERS.NET.
.			3600000	IN	NS	E.ROOT-SERVERS.NET.

;; ADDITIONAL SECTION:
A.ROOT-SERVERS.NET.	479587	IN	A	198.41.0.4
A.ROOT-SERVERS.NET.	479587	IN	AAAA	2001:503:ba3e::2:30
B.ROOT-SERVERS.NET.	437851	IN	A	192.228.79.201
C.ROOT-SERVERS.NET.	180245	IN	A	192.33.4.12
D.ROOT-SERVERS.NET.	176799	IN	A	128.8.10.90
D.ROOT-SERVERS.NET.	176799	IN	AAAA	2001:500:2d::d
E.ROOT-SERVERS.NET.	435171	IN	A	192.203.230.10
F.ROOT-SERVERS.NET.	480458	IN	A	192.5.5.241
F.ROOT-SERVERS.NET.	176194	IN	AAAA	2001:500:2f::f
G.ROOT-SERVERS.NET.	481122	IN	A	192.112.36.4
H.ROOT-SERVERS.NET.	438160	IN	A	128.63.2.53
H.ROOT-SERVERS.NET.	438160	IN	AAAA	2001:500:1::803f:235
I.ROOT-SERVERS.NET.	479694	IN	A	192.36.148.17
I.ROOT-SERVERS.NET.	479694	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri May 18 00:46:57 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2028
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 7

;; QUESTION SECTION:
;columbia.edu.			IN	SOA

;; AUTHORITY SECTION:
edu.			172800	IN	NS	a.edu-servers.net.
edu.			172800	IN	NS	c.edu-servers.net.
edu.			172800	IN	NS	d.edu-servers.net.
edu.			172800	IN	NS	f.edu-servers.net.
edu.			172800	IN	NS	g.edu-servers.net.
edu.			172800	IN	NS	l.edu-servers.net.

;; ADDITIONAL SECTION:
a.edu-servers.net.	172800	IN	A	192.5.6.30
c.edu-servers.net.	172800	IN	A	192.26.92.30
d.edu-servers.net.	172800	IN	A	192.31.80.30
f.edu-servers.net.	172800	IN	A	192.35.51.30
g.edu-servers.net.	172800	IN	A	192.42.93.30
l.edu-servers.net.	172800	IN	A	192.41.162.30
g.edu-servers.net.	172800	IN	AAAA	2001:503:cc2c::2:36

;; Query time: 38 msec
;; SERVER: 2001:7fd::1#53(K.ROOT-SERVERS.NET)
;; WHEN: Fri May 18 00:46:57 2012
;; MSG SIZE  rcvd: 265

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 158
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 4

;; QUESTION SECTION:
;columbia.edu.			IN	SOA

;; AUTHORITY SECTION:
columbia.edu.		172800	IN	NS	dns2.itd.umich.edu.
columbia.edu.		172800	IN	NS	adns1.berkeley.edu.
columbia.edu.		172800	IN	NS	adns2.berkeley.edu.
columbia.edu.		172800	IN	NS	ns1.lse.ac.uk.
columbia.edu.		172800	IN	NS	ext-ns1.columbia.edu.

;; ADDITIONAL SECTION:
dns2.itd.umich.edu.	172800	IN	A	141.211.125.15
adns1.berkeley.edu.	172800	IN	A	128.32.136.3
adns2.berkeley.edu.	172800	IN	A	128.32.136.14
ext-ns1.columbia.edu.	172800	IN	A	128.59.59.165

;; Query time: 254 msec
;; SERVER: 192.26.92.30#53(c.edu-servers.net)
;; WHEN: Fri May 18 00:46:57 2012
;; MSG SIZE  rcvd: 221

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1926
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 1

;; QUESTION SECTION:
;columbia.edu.			IN	SOA

;; ANSWER SECTION:
columbia.edu.		3600	IN	SOA	master-ns.columbia.edu. hostmaster.columbia.edu. 6572 3600 1800 2419200 3600

;; AUTHORITY SECTION:
columbia.edu.		3600	IN	NS	ext-ns1.columbia.edu.
columbia.edu.		3600	IN	NS	dns2.itd.umich.edu.
columbia.edu.		3600	IN	NS	adns2.berkeley.edu.
columbia.edu.		3600	IN	NS	adns1.berkeley.edu.
columbia.edu.		3600	IN	NS	ns1.lse.ac.uk.

;; ADDITIONAL SECTION:
ext-ns1.columbia.edu.	3600	IN	A	128.59.59.165

;; Query time: 244 msec
;; SERVER: 128.59.59.165#53(ext-ns1.columbia.edu)
;; WHEN: Fri May 18 00:46:58 2012
;; MSG SIZE  rcvd: 230

HTTP

Looking for CNAME of www.columbia.edu
Warning: Might be out sourced to a web service.
Checking if there is a AAAA for www.columbia.edu ... FAILED.


; <<>> DiG 9.4.1-P1 <<>> www.columbia.edu aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1692
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.columbia.edu.		IN	AAAA

;; ANSWER SECTION:
www.columbia.edu.	3600	IN	CNAME	www.columbia.akadns.net.

;; AUTHORITY SECTION:
akadns.net.		180	IN	SOA	internal.akadns.net. hostmaster.akamai.com. 1337267818 90000 90000 90000 180

;; Query time: 5 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri May 18 00:46:58 2012
;; MSG SIZE  rcvd: 137

Checking other options ... failed too.

SMTP

MX 10 external-smtp-multi-vif.cc.columbia.edu
Looking for AAAA on external-smtp-multi-vif.cc.columbia.edu

DNS

Looking for AAAA of NS dns2.itd.umich.edu
No AAAA record for dns2.itd.umich.edu
Looking for AAAA of NS ns1.lse.ac.uk
No AAAA record for ns1.lse.ac.uk
Looking for AAAA of NS adns1.berkeley.edu
Querying 2607:f140:ffff:fffe:0:0:0:3 for SOA of columbia.edu over IPv6 ... successful!
Looking for AAAA of NS adns2.berkeley.edu
Querying 2607:f140:ffff:fffe:0:0:0:e for SOA of columbia.edu over IPv6 ... successful!
Looking for AAAA of NS ext-ns1.columbia.edu
No AAAA record for ext-ns1.columbia.edu

NTP

Looking for an A record for ntp.columbia.edu
Looking for an A record for clock.columbia.edu
Looking for an A record for time.columbia.edu
Looking for an A record for chime.columbia.edu

XMPP

Looking for a SRV record for _xmpp-client._tcp.columbia.edu
Looking for a SRV record for _xmpp-server._tcp.columbia.edu

Last Updated: Thu May 17 15:17:02 2012 UTC