These maps show the geographic distribution of class A, B, and C IP addresses. The left-hand maps show point locations, while those on the right display kernel densities. Because points can be co-located, some high-density locations only appear on the kernel density maps.
There are some interesting differences between the maps, particularly in Brazil, Australia, and parts of Western Europe. There is also a bright yellow spot on the kernel density maps just northwest of Lake Bakal in Russia. At that location, tens of thousands of IP addresses are all located at a very specific latitude/longitude.
Data source: http://dev.maxmind.com/geoip/geoip2/geolite2/