Thanks very much for this link (and the summary). I see an interesting (if not surprising) trend in Advertised AS Count. Up until 2001 it was accelerating... and after 2001 its stayed linear. However, unadvertised AS count which was basically stagnant has increased markedly before
then. Those are not unadvertised ASNs. Those are only ASNs which have been issued but are undetectable by his monitoring tools. That doesn't mean that they are not advertised, just that his tool cannot detect them. Given the fact that the Internet is now thoroughly global with rich interconnectivity in most regions of the globe, it is hardly surprising that lots of ASNs do not get advertised globally. The trend you see is likely cause by rich local interconnectivity becoming the norm rather than a few circuits from the capital city to some big U.S. city. --Michael Dillon