Anthropic incident

Connection failures for organizations restricting GitHub access by IP address

Major Resolved View vendor source →

Anthropic experienced a major incident on May 6, 2026 affecting claude.ai and Claude Code, lasting 18h 3m. The incident has been resolved; the full update timeline is below.

Started
May 06, 2026, 10:32 PM UTC
Resolved
May 07, 2026, 04:36 PM UTC
Duration
18h 3m
Detected by Pingoru
May 06, 2026, 10:32 PM UTC

Affected components

claude.aiClaude Code

Update timeline

  1. identified May 06, 2026, 10:32 PM UTC

    We have identified an issue affecting organizations that restrict GitHub access by source IP address. A recent infrastructure change altered the IP addresses Anthropic uses for outbound connections to GitHub, which may cause Claude Code remote sessions, GitHub Enterprise plugin syncing, and Claude Security to fail. We are reverting the change to restore the previous IP ranges; no allowlist changes will be needed on your side. We will post an update once the fix is deployed.

  2. monitoring May 07, 2026, 03:17 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved May 07, 2026, 04:36 PM UTC

    This incident has been resolved.