Where can I find a list of country-specific IP ranges for Mexico? I know there are services I can query to determine if a specific address is based in Mexico, but doing that each time a new user loads a page seems like overkill. I'd like to create an XML file with IP ranges that I can check against.
The best I've been able to find so far is here: http://www.nirsoft.net/countryip/mx.html but it is far from accurate.
I've used this db before. I'm not sure how accurate it is these days.