Aihps3.106
net.general
utzoo!decvax!ucbvax!mhtsa!harpo!npois!houxi!ihnss!ihps3!pcl
Wed Feb  3 08:17:16 1982
Re: access to this network
Only access charge is phone costs to a willing site.  Tell us where you're
working, and someone should be able to tell you of the closest sites.

(Of course, you also need something akin to uucp (for file transfer and
remote execution).)