nc10@your-5554c55be4 ~
$ netstat -an | grep '72.232.233.42:6789'                                                   TCP    192.168.1.100:11418    72.232.233.42:6789     ESTABLISHED

nc10@your-5554c55be4 ~
$ netstat -an | awk '$4 ~ /ESTABLISHED/ && $3 ~ /72.232.233.42:6789/{print "Connected"} '
Connected

nc10@your-5554c55be4 ~
$