Source CIDR

Cloudflare

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Cloudflare publishes IPv4 and IPv6 addresses used by its reverse-proxy and CDN edge for allowlisting origin firewalls.

Autonomous systems

AS13335 AS209242
Amazon CloudFront AWS edge ranges used for origin firewall rules. Fastly Public CDN edge list with similar origin protection use cases. Akamai Official CDN CIDR downloads for origin IP ACLs. Amazon Web Services The broader AWS ip-ranges.json feed, including service filtering context.