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The contents of this legacy page are no longer maintained nor supported, and are made available only for historical purposes. These pages present the results of CAIDA's work in 2005 and 2006 analyzing the rates and levels of consumption and use of Internet identifiers. Geoff Houston maintains current statistics on IPv4 consumption. Due to resource constraints and other priorities, we have shifted

See the IPv4 and IPv6 AS Core in 2020 for details of our latest AS Core 2020 visualization, and download a poster of the latest AS Core visualization. AS Core 2020 data source and analysis AS Core 2020 Poster About the AS Core visualizations Data Source CAIDA's AS Core visualization represents a macroscopic snapshot of IPv4 and IPv6 Internet topology samples captured over the course of a year. The

In The News Routing Data: Ukraine’s Wartime Internet from the Inside (Kentik) May 19 2023 Graph Analytics: "Semantic Spacetime and Data Analytics" (Mark Burgess) Dec 16 2021 Security: "News Archive Internet Security Doesn’t Measure Up; a Team of Experts Is Working to Change This" (SDSC) Oct 13 2021 DNS: Afilias to Protect TLDs Against Potential "Orphan Glue" Exploits (CircleID) Aug 11 2020 Interne

The contents of this legacy page are no longer maintained nor supported, and are made available only for historical purposes. First released in 1998, skitter is a tool for actively probing the Internet in order to analyze topology and performance. Skitter was also used in reference to the Macroscopic Topology Measurements Project and the Skitter infrastructure, which has since been replaced with t