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gcp · us-west1

Google Cloud uses 70 prefixes for us-west1.

Last updated 4 Nov 2026 from Google Cloud’s own list (file dated 2026-11-03T18:03:05.86262)

Short answer

Google Cloud lists these prefixes under “us-west1”. Google Cloud publishes cloud.json: the external address ranges available to Google Cloud customers, with the region (scope) each one is used in.

IPv4 prefixes68
IPv6 prefixes2
Regions in the first 100us-west1
Fetched by peekip4 Nov 2026

Prefixes

PrefixRegion / locationService
104.196.224.0/19us-west1us-west1
104.198.0.0/20us-west1us-west1
104.198.96.0/20us-west1us-west1
104.199.112.0/20us-west1us-west1
136.109.0.0/16us-west1us-west1
136.117.0.0/16us-west1us-west1
136.118.0.0/16us-west1us-west1
136.66.0.0/15us-west1us-west1
136.69.128.0/17us-west1us-west1
136.70.0.0/18us-west1us-west1
136.74.0.0/16us-west1us-west1
136.86.128.0/17us-west1us-west1
136.87.0.0/16us-west1us-west1
179.193.192.0/18us-west1us-west1
179.199.0.0/17us-west1us-west1
179.67.64.0/18us-west1us-west1
179.69.128.0/18us-west1us-west1
186.242.0.0/18us-west1us-west1
34.105.0.0/17us-west1us-west1
34.11.128.0/17us-west1us-west1
34.118.192.0/21us-west1us-west1
34.127.0.0/17us-west1us-west1
34.143.64.0/21us-west1us-west1
34.145.0.0/17us-west1us-west1
34.157.112.0/21us-west1us-west1
34.157.240.0/21us-west1us-west1
34.158.240.0/21us-west1us-west1
34.158.8.0/21us-west1us-west1
34.168.0.0/15us-west1us-west1
34.177.112.0/21us-west1us-west1
34.182.0.0/17us-west1us-west1
34.183.113.0/24us-west1us-west1
34.183.124.0/24us-west1us-west1
34.183.160.0/23us-west1us-west1
34.183.24.0/22us-west1us-west1
34.183.58.0/24us-west1us-west1
34.184.112.0/24us-west1us-west1
34.184.123.0/24us-west1us-west1
34.184.160.0/23us-west1us-west1
34.184.24.0/22us-west1us-west1
34.184.55.0/24us-west1us-west1
34.187.128.0/17us-west1us-west1
34.19.0.0/17us-west1us-west1
34.3.96.0/20us-west1us-west1
34.4.104.0/21us-west1us-west1
34.4.208.0/20us-west1us-west1
34.53.0.0/17us-west1us-west1
34.82.0.0/15us-west1us-west1
35.185.192.0/18us-west1us-west1
35.197.0.0/17us-west1us-west1
Showing 50 of 70 prefixes All prefixes (CSV)

What changed

  • 1 Nov 2026
    + 34.183.160.0/23
+ 34.184.160.0/23
  • 25 Oct 2026
    + 179.193.192.0/18
+ 179.199.0.0/17
+ 186.242.0.0/18
  • 23 Oct 2026
    − 179.193.192.0/18
− 179.199.0.0/17
− 186.242.0.0/18
  • 22 Oct 2026
    + 179.193.192.0/18
+ 179.199.0.0/17
+ 186.242.0.0/18
  • 11 Oct 2026
    + 179.67.64.0/18
+ 179.69.128.0/18
  • 9 Oct 2026
    − 179.67.64.0/18
− 179.69.128.0/18

Allowlist formats

nginx (first 5 prefixes)
allow 104.196.224.0/19;
allow 104.198.0.0/20;
allow 104.198.96.0/20;
allow 104.199.112.0/20;
allow 136.109.0.0/16;
deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 104.196.224.0/19 -j ACCEPT
iptables -A INPUT -s 104.198.0.0/20 -j ACCEPT
iptables -A INPUT -s 104.198.96.0/20 -j ACCEPT
iptables -A INPUT -s 104.199.112.0/20 -j ACCEPT
iptables -A INPUT -s 136.109.0.0/16 -j ACCEPT

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

Sources

  1. Google Cloud: published IP ranges · checked 4 Nov 2026
  2. Google Cloud documentation