ping ie100.net -- unknown host

[thufir]

Just curious why the ping doesn't work:

thufir at dur:~$ 
thufir at dur:~$ ping google.com
PING google.com (173.194.33.34) 56(84) bytes of data.
64 bytes from sea09s02-in-f2.1e100.net (173.194.33.34): icmp_req=1 ttl=55 
time=2510 ms
^C64 bytes from sea09s02-in-f2.1e100.net (173.194.33.34): icmp_req=2 
ttl=55 time=2359 ms
^C64 bytes from sea09s02-in-f2.1e100.net (173.194.33.34): icmp_req=3 
ttl=56 time=2332 ms

--- google.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2016ms
rtt min/avg/max/mdev = 2332.351/2400.842/2510.498/78.346 ms, pipe 3
thufir at dur:~$ 
thufir at dur:~$ ping ie100.net
ping: unknown host ie100.net
thufir at dur:~$ 



I've been able to ping ie100.net in the past.  Is there some form of DNS 
lookup on my system which is causing that?


The primary dns is:  64.59.144.18
backups dns:   64.59.150.134

I'm connected via a universal wireless adapter of this type:
www.iogear.com/product/GWU627/‎

from which those dns entries are acquired, I assume, from the router.

thanks,

Thufir