li15-67 libexec # nslookup www.somesite.com x.x.x.221 | grep 'connection timed out'
li15-67 libexec # echo $?
1
li15-67 libexec # nslookup www.somesite.com x.x.x.222 | grep 'connection timed out'
;; connection timed out; no servers could be reached
li15-67 libexec # echo $?
0