perl -e 'print "true!" if 10 * 256**3 + 0 * 256**2 + 0 * 256 + 1 == 167772161' # prints true! #### $ ping 167772161 PING 167772161 (10.0.0.1): 56 data bytes ^C --- 167772161 ping statistics --- 2 packets transmitted, 0 packets received, 100% packet loss