Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site ucbvax.BERKELEY.EDU
Path: utzoo!decvax!bellcore!ulysses!cbosgd!ucbvax!MITRE-GATEWAY.ARPA!louden
From: louden@MITRE-GATEWAY.ARPA (T. Michael Louden, MS W422)
Newsgroups: mod.protocols.tcp-ip
Subject: RE: RFC986 Questions
Message-ID: <8606122211.AA19218@ucbvax.Berkeley.EDU>
Date: Thu, 12-Jun-86 16:38:28 EDT
Article-I.D.: ucbvax.8606122211.AA19218
Posted: Thu Jun 12 16:38:28 1986
Date-Received: Fri, 13-Jun-86 00:46:04 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 2
Approved: tcp-ip@sri-nic.arpa

So the RFC is for addressing in an ISO stack on the ARPA style net.
That makes more sense to me.  Thanks for the clearification!