Netfind
A research prototype that provides a simple {Internet} "{white
pages}" user directory. It runs on {SunOS} 4.0 or more recent
systems that are connected to the Internet (however, you can
run Netfind on one server at your site, and let the others use
Netfind on that server). Given the name of a person on the
Internet and a rough description of where the person works,
Netfind attempts to locate telephone and electronic mailbox
information about the person.
(ftp://ftp.cs.colorado.edu/pub/cs/distribs/netfind).