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aws · S3

Amazon Web Services uses 1,146 prefixes for S3.

Last updated 6 Nov 2026 from Amazon Web Services’s own list (file dated 2026-11-05-23-07-05)

Short answer

S3 lists the endpoints of Amazon S3 storage in each region.

IPv4 prefixes483
IPv6 prefixes663
Regions in the first 100eu-central-1, us-west-1, ap-northeast-3, ap-southeast-5, ap-east-1, ap-southeast-2, me-south-1, eu-south-1 …
Fetched by peekip6 Nov 2026

Prefixes

PrefixRegion / locationService
1.178.10.0/24eu-central-1S3
1.178.100.0/24us-west-1S3
1.178.101.0/24ap-northeast-3S3
1.178.102.0/24ap-southeast-5S3
1.178.103.0/24ap-east-1S3
1.178.11.0/24ap-southeast-2S3
1.178.16.0/24me-south-1S3
1.178.17.0/24eu-south-1S3
1.178.18.0/24af-south-1S3
1.178.19.0/24ap-southeast-3S3
1.178.20.0/24me-central-1S3
1.178.21.0/24eu-central-2S3
1.178.22.0/24eu-south-2S3
1.178.23.0/24ap-south-2S3
1.178.24.0/24ap-southeast-4S3
1.178.25.0/24il-central-1S3
1.178.26.0/24ca-west-1S3
1.178.27.0/24ap-southeast-6S3
1.178.28.0/24ap-southeast-7S3
1.178.29.0/24mx-central-1S3
1.178.30.0/24us-gov-west-1S3
1.178.31.0/24ap-east-2S3
1.178.4.0/24us-east-1S3
1.178.5.0/24us-east-1S3
1.178.6.0/24us-east-1S3
1.178.64.0/24ap-northeast-1S3
1.178.65.0/24us-west-2S3
1.178.7.0/24eu-west-1S3
1.178.8.0/24us-east-2S3
1.178.88.0/24ap-south-1S3
1.178.89.0/24ap-southeast-1S3
1.178.9.0/24us-west-2S3
1.178.90.0/24eu-west-3S3
1.178.91.0/24ap-northeast-2S3
1.178.92.0/24ca-central-1S3
1.178.93.0/24eu-north-1S3
1.178.94.0/24eu-west-2S3
1.178.95.0/24sa-east-1S3
108.136.154.16/28ap-southeast-3S3
108.136.154.32/28ap-southeast-3S3
108.136.154.48/28ap-southeast-3S3
108.175.48.0/22us-gov-west-1S3
108.175.52.0/22us-gov-east-1S3
108.175.56.0/22us-gov-west-1S3
108.175.60.0/22us-gov-east-1S3
13.213.20.144/28ap-southeast-1S3
13.213.20.160/28ap-southeast-1S3
13.245.93.176/28af-south-1S3
13.245.93.192/28af-south-1S3
13.248.224.0/24GLOBALS3
Showing 50 of 1,146 prefixes All prefixes (CSV)

What changed

  • 9 Oct 2026
    + 16.15.100.0/22
+ 16.15.104.0/22
+ 16.15.108.0/22
+ 16.15.112.0/22
+ 16.15.116.0/22
+ 16.15.120.0/22
  • 8 Oct 2026
    + 16.15.80.0/22
+ 16.15.84.0/22
+ 16.15.88.0/22
+ 16.15.92.0/22
+ 16.15.96.0/22
  • 7 Oct 2026
    + 16.15.64.0/22
+ 16.15.68.0/22
+ 16.15.72.0/22
+ 16.15.76.0/22

Allowlist formats

nginx (first 5 prefixes)
allow 1.178.10.0/24;
allow 1.178.100.0/24;
allow 1.178.101.0/24;
allow 1.178.102.0/24;
allow 1.178.103.0/24;
deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 1.178.10.0/24 -j ACCEPT
iptables -A INPUT -s 1.178.100.0/24 -j ACCEPT
iptables -A INPUT -s 1.178.101.0/24 -j ACCEPT
iptables -A INPUT -s 1.178.102.0/24 -j ACCEPT
iptables -A INPUT -s 1.178.103.0/24 -j ACCEPT

Generate the full list from the CSV, and refresh it on a schedule: providers add and retire prefixes often.

Sources

  1. Amazon Web Services: published IP ranges · checked 6 Nov 2026
  2. Amazon Web Services documentation