For more information send the single word 'help' to the same address. If you're able to use the 'nslookup' command on your system you can find out interactively. On a Unix system try 'man nslookup' for help on using nslookup. Another way is to use 'telnet ', normally that shows the IP address of the site as well. Unless otherwise stated, all sites take 'anonymous' for the username and your e-mail address for the password.
Most sites accept username 'ftp' as well.
This does not mean that that site is no longer operational, just that it wasn't reachable for me at that moment. I don't want to use daylight savings or something like summertime or whatever because it complicates matters. If they have regional access or limited links, respect their restrictions. And remember that mirrors are here for a reason. Don't ruin it for yourself and lots of others by overusing a site or not abiding by their rules.