Check that www.upenn.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 upenn.edu soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1878
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			168426	IN	NS	e.root-servers.net.
.			168426	IN	NS	m.root-servers.net.
.			168426	IN	NS	b.root-servers.net.
.			168426	IN	NS	c.root-servers.net.
.			168426	IN	NS	h.root-servers.net.
.			168426	IN	NS	a.root-servers.net.
.			168426	IN	NS	l.root-servers.net.
.			168426	IN	NS	g.root-servers.net.
.			168426	IN	NS	d.root-servers.net.
.			168426	IN	NS	i.root-servers.net.
.			168426	IN	NS	k.root-servers.net.
.			168426	IN	NS	f.root-servers.net.
.			168426	IN	NS	j.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	37749	IN	A	198.41.0.4
a.root-servers.net.	37749	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	514414	IN	A	192.228.79.201
c.root-servers.net.	383797	IN	A	192.33.4.12
d.root-servers.net.	342146	IN	A	128.8.10.90
d.root-servers.net.	342146	IN	AAAA	2001:500:2d::d
e.root-servers.net.	514414	IN	A	192.203.230.10
f.root-servers.net.	38620	IN	A	192.5.5.241
f.root-servers.net.	343496	IN	AAAA	2001:500:2f::f
g.root-servers.net.	39284	IN	A	192.112.36.4
h.root-servers.net.	601135	IN	A	128.63.2.53
h.root-servers.net.	601135	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	37856	IN	A	192.36.148.17
i.root-servers.net.	37856	IN	AAAA	2001:7fe::53

;; Query time: 10 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed May 23 03:30:55 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1757
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 7

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

;; AUTHORITY SECTION:
edu.			172800	IN	NS	a.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.
edu.			172800	IN	NS	d.edu-servers.net.
edu.			172800	IN	NS	c.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
g.edu-servers.net.	172800	IN	AAAA	2001:503:cc2c::2:36
l.edu-servers.net.	172800	IN	A	192.41.162.30

;; Query time: 138 msec
;; SERVER: 2001:503:c27::2:30#53(j.root-servers.net)
;; WHEN: Wed May 23 03:30:55 2012
;; MSG SIZE  rcvd: 262

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 356
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 6

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

;; AUTHORITY SECTION:
upenn.edu.		172800	IN	NS	noc3.dccs.upenn.edu.
upenn.edu.		172800	IN	NS	noc2.dccs.upenn.edu.
upenn.edu.		172800	IN	NS	dns1.udel.edu.
upenn.edu.		172800	IN	NS	dns2.udel.edu.
upenn.edu.		172800	IN	NS	sns-pb.isc.org.

;; ADDITIONAL SECTION:
noc3.dccs.upenn.edu.	172800	IN	A	128.91.251.158
noc3.dccs.upenn.edu.	172800	IN	AAAA	2607:f470:1003::3:3
noc2.dccs.upenn.edu.	172800	IN	A	128.91.254.1
noc2.dccs.upenn.edu.	172800	IN	AAAA	2607:f470:1002::2:2
dns1.udel.edu.		172800	IN	A	128.175.13.16
dns2.udel.edu.		172800	IN	A	128.175.13.17

;; Query time: 250 msec
;; SERVER: 192.41.162.30#53(l.edu-servers.net)
;; WHEN: Wed May 23 03:30:55 2012
;; MSG SIZE  rcvd: 261

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 817
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 4

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

;; ANSWER SECTION:
upenn.edu.		3600	IN	SOA	assailants.net.isc.upenn.edu. hostmaster.upenn.edu. 1002393618 10800 3600 604800 3600

;; AUTHORITY SECTION:
upenn.edu.		86400	IN	NS	noc2.dccs.upenn.edu.
upenn.edu.		86400	IN	NS	dns2.udel.edu.
upenn.edu.		86400	IN	NS	dns1.udel.edu.
upenn.edu.		86400	IN	NS	noc3.dccs.upenn.edu.
upenn.edu.		86400	IN	NS	sns-pb.isc.org.

;; ADDITIONAL SECTION:
noc2.dccs.upenn.edu.	86400	IN	A	128.91.254.1
noc2.dccs.upenn.edu.	86400	IN	AAAA	2607:f470:1002::2:2
noc3.dccs.upenn.edu.	86400	IN	A	128.91.251.158
noc3.dccs.upenn.edu.	86400	IN	AAAA	2607:f470:1003::3:3

;; Query time: 203 msec
;; SERVER: 2001:500:2e::1#53(sns-pb.isc.org)
;; WHEN: Wed May 23 03:30:56 2012
;; MSG SIZE  rcvd: 295

HTTP

Looking for CNAME of www.upenn.edu
Checking if there is a AAAA for www.upenn.edu ... success.
Sending...

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

Reading ...

HTTP/1.1 200 OK
Server: Apache/2.2.22 (Unix) mod_ssl/2.2.22 OpenSSL/0.9.8e-fips-rhel5
Content-Type: text/html
Date: Tue, 22 May 2012 18:00:58 GMT
Connection: keep-alive

Accessed / [2001:4478:1820:100:0:0:cbce:8119] Response: HTTP/1.1 200 OK

SMTP

MX 10 cluster5.us.messagelabs.com
Looking for AAAA on cluster5.us.messagelabs.com
MX 10 cluster5a.us.messagelabs.com
Looking for AAAA on cluster5a.us.messagelabs.com

DNS

Looking for AAAA of NS noc3.dccs.upenn.edu
Querying 2607:f470:1003:0:0:0:3:3 for SOA of upenn.edu over IPv6 ... successful!
Looking for AAAA of NS dns1.udel.edu
No AAAA record for dns1.udel.edu
Looking for AAAA of NS dns2.udel.edu
No AAAA record for dns2.udel.edu
Looking for AAAA of NS noc2.dccs.upenn.edu
Querying 2607:f470:1002:0:0:0:2:2 for SOA of upenn.edu over IPv6 ... successful!
Looking for AAAA of NS sns-pb.isc.org
Querying 2001:500:2e:0:0:0:0:1 for SOA of upenn.edu over IPv6 ... successful!

NTP

Looking for an A record for ntp.upenn.edu
Found an A or AAAA record. Now looking for a AAAA.
ntpdate -sq ntp.upenn.edu (2607:f470:1002:0:0:0:2:2)
server 2607:f470:1002::2:2, stratum 2, offset -0.004164, delay 0.27869

XMPP

Looking for a SRV record for _xmpp-client._tcp.upenn.edu
Found XMPP client jabber.upenn.edu (5, 5222)
Trying to connect to 128.91.2.172 on 5222 ... Connection succeeded
Trying to connect to 2607:f470:1001:0:0:0:1:12 on 5222 ... Connection succeeded

Looking for a SRV record for _xmpp-server._tcp.upenn.edu
Found XMPP server jabber.upenn.edu (5, 5269)
Trying to connect to 128.91.2.172 on 5269 ... Connection succeeded
Trying to connect to 2607:f470:1001:0:0:0:1:12 on 5269 ... Connection succeeded

Last Updated: Tue May 22 18:01:03 2012 UTC