IP Geolocation with Anycast IP addresses

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IP Geolocation with Anycast IP addresses

L1 Bithead

Hi there,


I am wondering how geolocation is working with IP addresses where anycast is used.

Anycast addresses are shared by multiple server, typically with different locations.


How is such an address assigned to a particular country/region in the Geolocation DB?

Does anybody know?







Cyber Elite
Cyber Elite


I don't think there's any rhyme or reason for where these get placed. CloudFlare's is currently listed in Australia, Google's is listed in the United States, along with Quad9's 

L6 Presenter

I see the same for various public DNS at the moment, though I have had problems with them changing in the past. So I created a custom region code "CDN" in Objects -> Regions and placed any kind of generic anycast/CDN addresses that I want to communicate with. Use my custom CDN region, in addition to standard country region codes, as the destination in outbound rules.

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