The code that was constructing this diagram was running from July 16, 1998 until June 10, 2006. I had just finished reading “Practical Reusable Unix Software” (which is now available for download) and was trying to do something cool using graphviz. Yep, almost the same time as the Internet Mapping Project began.
I believe the World IPv6 Day is as close a date as we can get to a new Internet Flag Day. This time the switch will not happen in a day but gradually and very (very) slowly. Hopefully in 30 years from today, no IPv4 islands will exist.