Ilia Alshanetsky has posted the next set of results from his domains-running-PHP research he's been doing. In this latest post he looks at the domain distribution by city mostly falling in the US, Europe and China.
I am making available two additional geographic chats that breakdown the domain distribution by top world cities. The first chart a preview of which can been below (click to see full, browse-able/zoomable version) shows the Top 150 cities, by domain distribution. These cities represent a total 91.3% of some 102 million domains that could be resolved to a city level.
The top ranking city falls in the US in Scottsdale, Arizona (because of the large domain provider GoDaddy being based there) with the second place spot going to San Francisco, California. He's created both a interactive map you can use to see the numbers for different parts of the world and a concentration view of the same results making it a bit easier to digest.