RFC 1918 network range choices

Jerry Cloe jerry at jtcloe.net
Thu Oct 5 17:32:19 CST 2017

Several years ago I remember seeing a mathematical justification for it, and I remember thinking at the time it made a lot of sense, but now I can't find it.

I think the goal was to make it easier for routers to dump private ranges based on simple binary math, but not sure that concept ever got widely used.

Time to start writing  out all the binary.

-----Original message-----
From:Jay R. Ashworth <jra at baylink.com>
Sent:Thu 10-05-2017 09:41 am
Subject:RFC 1918 network range choices
To:North American Network Operators‘ Group <nanog at nanog.org>; 
Does anyone have a pointer to an *authoritative* source on why

172.16/12 and

were the ranges chosen to enshrine in the RFC?  Came up elsewhere, and I can't 
find a good citation either.

To list or I'll summarize.

-- jra


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