So as an example of where this is a problem - All NZ government websites are hosted underneath the govt.nz namespace, e.g. dia.govt.nz, treasury.govt.nz, ssc.govt.nz and so on.

But all of them are evaluated as one, govt.nz. But they are all quite separately hosted and operated and use differing technologies.

Looks like this works fine for other similar situations e.g. .co.uk.

This is a really cool service, thanks for making it available for use!