root servers more debug data

At present I am able to reach root nameservers A, B, C, D, E, G, I and receive valid replies to a name request. Root nameserver F is not reachable from my network. Root nameserver H is responding to all my requests with the 4-bit Response Code field set to the value 0x03 ("Name error") This is confusing a fair number of things. -matthew kaufman matthew@scruz.net ps. this is clearly the wrong list for this, but the only one I am on and successfully receiving mail from.