Thank you David. As I expected, you gave a very nice presentation. You also got me to investigate the 90.0.0.n range. It does appear the this range is a myth and not truly reserved. Here is a link I ran into: http://www.bcmaven.com/networking/myths.htm If anyone has more info on the 90.0.0.n range, please post. In particular, how the myth get started, or a reference to where it is reserved would be nice. If memory serves me, I originally found it in a Ziff-Davis publication, as well as a few other places, but not a definitive source. Peter ----------------------------------------------- The NoSpin Group [log in to unmask] > -----Original Message----- > The most common private ranges, defined by RFC 1918, are > > 10.x.x.x (1 Class A network) > 172.16.x.x - 172.31.x.x (16 Class B networks) > 192.168.x.x (256 Class C networks) > > APIPA (169.254.x.x (Class B)) is a special case defined > elsewhere, as is > (I believe) 192.0.2.x (Class C). I'm not sure where, or even > if, 90.x.x.x > is defined. > > David Gillett (no final e...) The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com