Here is a list of directory servers that from the comp.infosystems.wais news group:
:ip-name "wais.sdsu.edu"
:tcp-port 210
:database-name "SDSU-directory-of-servers"
:ip-name "archie.au"
:tcp-port 210
:database-name "au-directory-of-servers"
:ip-name "irit.irit.fr"
:tcp-port 210
:database-name "directory-irit-fr"
:ip-name "ds.internic.net"
:tcp-port 210
:database-name "resources"