Google Cloud uses 14 prefixes for us-central2.
Short answer
Google Cloud lists these prefixes under “us-central2”. 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
No prefixes added or removed since we started tracking this list. Changes appear here the day after the provider publishes them.
Allowlist formats
nginx (first 5 prefixes)
allow 107.167.160.0/20; allow 108.59.88.0/21; allow 136.73.0.0/16; allow 173.255.120.0/21; allow 34.183.115.0/24; deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 107.167.160.0/20 -j ACCEPT iptables -A INPUT -s 108.59.88.0/21 -j ACCEPT iptables -A INPUT -s 136.73.0.0/16 -j ACCEPT iptables -A INPUT -s 173.255.120.0/21 -j ACCEPT iptables -A INPUT -s 34.183.115.0/24 -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 3 Nov 2026
- Google Cloud documentation