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github · api

GitHub uses 27 prefixes for api.

Last updated 5 Nov 2026 from GitHub’s own list

Short answer

api lists the addresses of api.github.com.

IPv4 prefixes25
IPv6 prefixes2
Regions in the first 100—
Fetched by peekip5 Nov 2026

Prefixes

PrefixRegion / locationService
140.82.112.0/20—api
143.55.64.0/20—api
172.182.252.137/32—api
185.199.108.0/22—api
192.30.252.0/22—api
20.175.192.149/32—api
20.199.39.228/32—api
20.200.245.245/32—api
20.201.28.148/32—api
20.205.243.168/32—api
20.207.73.85/32—api
20.217.135.0/32—api
20.233.83.146/32—api
20.250.119.72/32—api
20.26.156.210/32—api
20.27.177.116/32—api
20.29.134.17/32—api
20.87.245.6/32—api
4.208.26.200/32—api
4.225.11.201/32—api
4.228.31.149/32—api
4.237.22.34/32—api
4.249.131.166/32—api
48.202.248.39/32—api
48.204.201.2/32—api
2606:50c0::/32—api
2a0a:a440::/29—api
Showing 27 of 27 prefixes All prefixes (CSV)

What changed

  • 21 Oct 2026
    + 20.250.119.72/32

Allowlist formats

nginx (first 5 prefixes)
allow 140.82.112.0/20;
allow 143.55.64.0/20;
allow 172.182.252.137/32;
allow 185.199.108.0/22;
allow 192.30.252.0/22;
deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 140.82.112.0/20 -j ACCEPT
iptables -A INPUT -s 143.55.64.0/20 -j ACCEPT
iptables -A INPUT -s 172.182.252.137/32 -j ACCEPT
iptables -A INPUT -s 185.199.108.0/22 -j ACCEPT
iptables -A INPUT -s 192.30.252.0/22 -j ACCEPT

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

Sources

  1. GitHub: published IP ranges · checked 5 Nov 2026
  2. GitHub documentation