Of course, but you got the hostname wrong. It's http://dnswl.swinog.ch aka http://antispam.imp.ch/swinog-dnsrbl-whitelist
But not only Swiss Mailservers, this would be a bit useless :-)
And of course there is also dnswl.org ;-) [Note that dnswl.org data also includes the Swinog whitelist, updated (ir)regularly.]
-- Matthias (one of admins@dnswl.org)