The accompanying figures make it clear that the high bits indicate which class an address is. --On Tuesday, January 11, 2005 16:48 -0600 Anson Rinesmith <anson at bigrivertel.net> wrote: > http://rfc.sunsite.dk/rfc/rfc796.html -- GPG/PGP --> 0xE736BD7E 5144 6A2D 977A 6651 DFBE 1462 E351 88B9 E736 BD7E