That's just a PTR record though. While scarlet.be implies the organization controlling it is in Belgium, that's not necessarily a guarantee the actual device using it is in Belgium. scarlet.be could deploy a box in Ghana or Chile and have its PTR record updated to something.dsl.scarlet.be. There's no actual enforcement that the device is in some physical location.
Loads of IP addresses for cloud providers ultimately resolve to things like amazon.com or google.com, does that mean those requests are from the US because it ends in .com?
I am not looking for a failproof way to ban all non-relevant ip's.
I'm looking for a method to exclude 99% of traffic based on IP ( if possible) and that i know how i can get in if the IP changes and it isn't updated automatically on the server ( as a failsafe).
Loads of IP addresses for cloud providers ultimately resolve to things like amazon.com or google.com, does that mean those requests are from the US because it ends in .com?