GitHub
GitHub publishes machine-readable metadata including hooks and API IP endpoints for firewall configuration.
Autonomous systems
Network background
GitHub is operated by Microsoft; egress often appears in major cloud ASNs. Use api.github.com/meta and GitHub’s changelog when allowlisting.
Third-party hosting & clouds
Microsoft / Azure (typical)
AS8075
AS12076
Illustrative only - meta JSON is authoritative for hook ranges.
Published ranges
GitHub Meta API
Official feedJSON with hooks, web, API, Git, pages, importer, and other IP lists maintained by GitHub.