When using the ip2location ip-to-country-host database I'm always getting hosts resolved for any ip address and some of those hosts have names like anonymouse.no or virtualip.fr . I can't look up the actual values right now so these are just examples. If an ip address wouldn't resolve to a host name I could simply disallow access based on that because an ip address that belongs to a legit service provider always resolves to a host name. So some kind of VPN database should be possible.
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