Google Cloud Platform

Google publishes GCP IPv4 and IPv6 prefixes in a single JSON file (cloud.json) and documents how to use it for firewall planning. This is cloud egress space - not Googlebot.

Autonomous systems

AS396982 AS15169

Google Cloud - cloud.json

Official feed

Official JSON listing Google Cloud public IP address ranges, updated by Google.

https://www.gstatic.com/ipranges/cloud.json

Documentation