Testing root server down code

I was thinking. If the "servers" went down on
28 June 1985, how many were there? Host table
#485 (October 1985) lists 1961 hosts.


Two. SRI-NIC and ISI-B.

A third root server ISI-F existed, but on June 12 1985 was
changed to a "test" server. All were located in California.
All were DECSystem-20/TOPS-20 mainframes running JEEVES.

On October 31, 1985 (Halloween) the first BIND root server was
announced at BRL-AOS (US east coast).