Thanks for all the pointers - now understand a lot more about how to properly use Net::hostent. However, my problem still remains. For instance, if I use the code snippet supplied my shenme, I get exactly the output promised. But my problem is that I would like to be able to give 'a562.cd.akamai.net' as the argument and have it return 'www.microsoft.com' as an alias. Alas, this does not happen and it appears that this is indeed the way this module (Net::hostent) is intended to work. So I am still wandering in the dark :( Thanks for all your efforts - Mark