Networking: DNS: trying to understand subdomain conventions

adam@201wdc0t2:~$ ping -c 1 ip68-14-174-230.ok.ok.cox.net
PING ip68-14-174-230.ok.ok.cox.net (68.14.174.230) 56(84) bytes of data.
64 bytes from ip68-14-174-230.ok.ok.cox.net (68.14.174.230): icmp_req=1 ttl=52 time=196 ms

--- ip68-14-174-230.ok.ok.cox.net ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 196.350/196.350/196.350/0.000 ms



adam@201wdc0t2:~$ ping -c 1 ok.ok.cox.net
ping: unknown host ok.ok.cox.net



adam@201wdc0t2:~$ ping -c 1 ok.cox.net
ping: unknown host ok.cox.net



adam@201wdc0t2:~$ ping -c 1 cox.net
PING cox.net (68.99.123.161) 56(84) bytes of data.
64 bytes from ww2.cox.com (68.99.123.161): icmp_req=1 ttl=53 time=58.2 ms

--- cox.net ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 58.241/58.241/58.241/0.000 ms



adam@201wdc0t2:~$ ping -c 1 net
ping: unknown host net


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Delivery to the following recipient failed permanently:

     [email protected]

Technical details of permanent failure:
DNS Error: DNS server returned answer with no data

Delivery to the following recipient failed permanently:

     [email protected]


Technical details of permanent failure:
DNS Error: DNS server returned answer with no data


(I sent an email to [email protected]... it didn't come back)


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let's try the www's

adam@201wdc0t2:~$ ping -c 1 www.ip68-14-174-230.ok.ok.cox.net
ping: unknown host www.ip68-14-174-230.ok.ok.cox.net

adam@201wdc0t2:~$ ping -c 1 www.ok.ok.cox.net
ping: unknown host www.ok.ok.cox.net

PING www.ok.cox.net (68.1.17.7) 56(84) bytes of data.
^C
--- www.ok.cox.net ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms
 * this does point to a system, but does not have a webserver running.  Very interesting (to me).


adam@201wdc0t2:~$ ping -c 1 www.cox.net
PING www.cox.net (68.99.123.161) 56(84) bytes of data.
64 bytes from ww2.cox.com (68.99.123.161): icmp_req=1 ttl=53 time=56.3 ms

--- www.cox.net ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 56.360/56.360/56.360/0.000 ms
 * here, www.cox.net = cox.net.  Or maybe its better to say cox.net =  www.cox.net