Amazon Web Services uses 87 prefixes for CLOUDFRONT_ORIGIN_FACING.
Short answer
CLOUDFRONT_ORIGIN_FACING is the subset of CloudFront addresses that connect to your origin; AWS suggests allowing only these at an origin server.
Prefixes
What changed
- 16 Oct 2026
+ 2001:3fc6:4::/48 + 2001:3fc6:5::/48 + 51.74.20.0/24 + 51.74.21.0/24 + 51.74.22.0/24
- 14 Oct 2026
+ 2001:3fc6:3c::/47
Allowlist formats
nginx (first 5 prefixes)
allow 13.124.199.0/24; allow 130.176.0.0/18; allow 130.176.128.0/21; allow 130.176.136.0/23; allow 130.176.140.0/22; deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 13.124.199.0/24 -j ACCEPT iptables -A INPUT -s 130.176.0.0/18 -j ACCEPT iptables -A INPUT -s 130.176.128.0/21 -j ACCEPT iptables -A INPUT -s 130.176.136.0/23 -j ACCEPT iptables -A INPUT -s 130.176.140.0/22 -j ACCEPT
Generate the full list from the CSV, and refresh it on a schedule: providers add and retire prefixes often.
Sources
- Amazon Web Services: published IP ranges · checked 5 Nov 2026
- Amazon Web Services documentation