The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.
One of a set of tools we're offering as a way of saying thank you for being a part of the community.
There is no site that accesses the ASP pages, it's the client that accesses the pages. It only happens to be inside a frameset that comes from another server.
In JScript, you can use top.location.href to get the address of the main frameset source. But if that's not on the same server, you get a permission denied error.
You have to pick up the referer information where it's available (on the previous page) and send it on to the page where you need the information.