On Jan 7, 2013, at 1:52 PM, Ian McLaughlin wrote: Wouldn't it be ironic if Hecnet ran out of addresses :) Does anyone know what the largest DECnet deplayment was duing the good old days? The internal net at DEC was seriously out of addresses, though just like IP that's partly because the addressing scheme forced it to be somewhat sparse. Still, there were certainly tens of thousands of nodes on it. paul