Google Cloud uses 36 prefixes for asia-south1.
Short answer
Google Cloud lists these prefixes under “asia-south1”. Google Cloud publishes cloud.json: the external address ranges available to Google Cloud customers, with the region (scope) each one is used in.
Prefixes
What changed
- 11 Oct 2026
+ 34.183.136.0/22 + 34.184.136.0/22
- 9 Oct 2026
− 34.183.136.0/22 − 34.184.136.0/22
Allowlist formats
nginx (first 5 prefixes)
allow 136.83.128.0/17; allow 136.95.0.0/16; allow 34.0.227.0/24; allow 34.100.128.0/17; allow 34.104.108.0/23; deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 136.83.128.0/17 -j ACCEPT iptables -A INPUT -s 136.95.0.0/16 -j ACCEPT iptables -A INPUT -s 34.0.227.0/24 -j ACCEPT iptables -A INPUT -s 34.100.128.0/17 -j ACCEPT iptables -A INPUT -s 34.104.108.0/23 -j ACCEPT
Generate the full list from the CSV, and refresh it on a schedule: providers add and retire prefixes often.
Sources
- Google Cloud: published IP ranges · checked 5 Nov 2026
- Google Cloud documentation