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gcp · us-south1

Google Cloud uses 22 prefixes for us-south1.

Last updated 3 Nov 2026 from Google Cloud’s own list (file dated 2026-11-02T18:07:01.260033)

Short answer

Google Cloud lists these prefixes under “us-south1”. Google Cloud publishes cloud.json: the external address ranges available to Google Cloud customers, with the region (scope) each one is used in.

IPv4 prefixes20
IPv6 prefixes2
Regions in the first 100us-south1
Fetched by peekip3 Nov 2026

Prefixes

PrefixRegion / locationService
152.239.128.0/18us-south1us-south1
34.0.128.0/19us-south1us-south1
34.127.156.0/22us-south1us-south1
34.128.4.0/22us-south1us-south1
34.144.172.0/22us-south1us-south1
34.152.110.128/26us-south1us-south1
34.157.174.0/23us-south1us-south1
34.157.219.128/26us-south1us-south1
34.157.46.0/23us-south1us-south1
34.174.0.0/16us-south1us-south1
34.177.120.0/22us-south1us-south1
34.183.66.0/24us-south1us-south1
34.184.65.0/24us-south1us-south1
35.235.172.0/22us-south1us-south1
8.230.96.0/19us-south1us-south1
8.234.20.0/22us-south1us-south1
8.234.24.0/21us-south1us-south1
8.236.192.0/18us-south1us-south1
8.237.192.0/18us-south1us-south1
8.237.64.0/18us-south1us-south1
2600:1901:8140::/44us-south1us-south1
2600:1902:280::/44us-south1us-south1
Showing 22 of 22 prefixes All prefixes (CSV)

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 152.239.128.0/18;
allow 34.0.128.0/19;
allow 34.127.156.0/22;
allow 34.128.4.0/22;
allow 34.144.172.0/22;
deny all;
iptables (first 5 prefixes)
iptables -A INPUT -s 152.239.128.0/18 -j ACCEPT
iptables -A INPUT -s 34.0.128.0/19 -j ACCEPT
iptables -A INPUT -s 34.127.156.0/22 -j ACCEPT
iptables -A INPUT -s 34.128.4.0/22 -j ACCEPT
iptables -A INPUT -s 34.144.172.0/22 -j ACCEPT

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

Sources

  1. Google Cloud: published IP ranges · checked 3 Nov 2026
  2. Google Cloud documentation