GCP prefixes (cloud.json)
Official JSON listing Google Cloud public IP address ranges, updated by Google.
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
Commonly cited GCP / Google Cloud ASNs
Google LLC advertises substantial space for Google Cloud; other Google ASNs (e.g. 15169) can appear in related routing. Use cloud.json and Google’s docs as authoritative.
Announced under this company
AS396982
Overlap with broader Google
Some documentation cross-references core Google ASNs; always scope rules to the prefixes in cloud.json for GCP workloads.
Announced under this company
AS15169
Published ranges
Official documentation and feeds for each product—open the links for current ranges and verification guidance.