Hi Ok so we have been round and round on this subject but no one seems to have suggested the obvious. We are using x.x.x.x:nn for ipv4 why not use x:x:x:x.nn for ipv6. I will now don my fire proof vest. Regards, -- ---------------------------------- E-Mail: [email protected] Phone: +44 (0)1223 581051 Stephen Burley EMEA Registrar UUNET ----------------------------------