Check that www.cityu.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 cityu.edu soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 453
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

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

;; ADDITIONAL SECTION:
A.ROOT-SERVERS.NET.	443867	IN	A	198.41.0.4
A.ROOT-SERVERS.NET.	443867	IN	AAAA	2001:503:ba3e::2:30
B.ROOT-SERVERS.NET.	402131	IN	A	192.228.79.201
C.ROOT-SERVERS.NET.	144525	IN	A	192.33.4.12
D.ROOT-SERVERS.NET.	141079	IN	A	128.8.10.90
D.ROOT-SERVERS.NET.	141079	IN	AAAA	2001:500:2d::d
E.ROOT-SERVERS.NET.	399451	IN	A	192.203.230.10
F.ROOT-SERVERS.NET.	444738	IN	A	192.5.5.241
F.ROOT-SERVERS.NET.	140474	IN	AAAA	2001:500:2f::f
G.ROOT-SERVERS.NET.	445402	IN	A	192.112.36.4
H.ROOT-SERVERS.NET.	402440	IN	A	128.63.2.53
H.ROOT-SERVERS.NET.	402440	IN	AAAA	2001:500:1::803f:235
I.ROOT-SERVERS.NET.	443974	IN	A	192.36.148.17
I.ROOT-SERVERS.NET.	443974	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri May 18 10:42:17 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1581
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 7

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

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

;; 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: 179 msec
;; SERVER: 192.228.79.201#53(B.ROOT-SERVERS.NET)
;; WHEN: Fri May 18 10:42:18 2012
;; MSG SIZE  rcvd: 262

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1894
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2

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

;; AUTHORITY SECTION:
cityu.edu.		172800	IN	NS	ns5.cityu.edu.
cityu.edu.		172800	IN	NS	ns6.cityu.edu.

;; ADDITIONAL SECTION:
ns5.cityu.edu.		172800	IN	A	209.221.169.21
ns6.cityu.edu.		172800	IN	A	209.221.169.23

;; Query time: 132 msec
;; SERVER: 2001:503:cc2c::2:36#53(g.edu-servers.net)
;; WHEN: Fri May 18 10:42:18 2012
;; MSG SIZE  rcvd: 95

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

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

;; ANSWER SECTION:
cityu.edu.		28800	IN	SOA	ns5.cityu.edu. grp\.it\.sys\.network.cityu.edu. 2011071353 10800 3600 2419200 900

;; Query time: 199 msec
;; SERVER: 209.221.169.21#53(ns5.cityu.edu)
;; WHEN: Fri May 18 10:42:19 2012
;; MSG SIZE  rcvd: 86

HTTP

Looking for CNAME of www.cityu.edu
Checking if there is a AAAA for www.cityu.edu ... FAILED.


; <<>> DiG 9.4.1-P1 <<>> www.cityu.edu aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 639
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

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

;; AUTHORITY SECTION:
cityu.edu.		900	IN	SOA	ns6.cityu.edu. please_set_email.absolutely.nowhere. 2011071353 10800 3600 2419200 900

;; Query time: 4 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri May 18 10:42:20 2012
;; MSG SIZE  rcvd: 106

Checking other options ... failed too.

SMTP

MX 10 mail.cityu.edu
Looking for AAAA on mail.cityu.edu

DNS

Looking for AAAA of NS ns6.cityu.edu
No AAAA record for ns6.cityu.edu
Looking for AAAA of NS ns5.cityu.edu
No AAAA record for ns5.cityu.edu

NTP

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

XMPP

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

Last Updated: Fri May 18 01:12:23 2012 UTC