Interesting. The heuristic consists of checking whether "co.uk" resolves to an IP address. Now imagine an ISP which substitutes all name-not-found DNS errors wi

Interesting. The heuristic consists of checking whether "co.uk" resolves to an IP address. Now imagine an ISP which substitutes all name-not-found DNS errors with ad pages... I'm curious: dear customers of annoying ISPs, does "co.uk" resolve to an address for you?