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The Mailchimp outage of October 4, 2026, as measured from 10 regions

Single-region outage, 32 min long, from Oct 4, 2026, 10:21 AM UTC to Oct 4, 2026, 10:52 AM UTC.

Region-by-region timeline

When each monitored region started failing and when it recovered, per RealUptime's own probes. A region not listed here never failed during this incident.

US-Central32 min
Failing from Oct 4, 2026, 10:21 AM UTC, recovered Oct 4, 2026, 10:52 AM UTC

How this was measured

This record comes only from RealUptime's own scheduled probes against Mailchimp's public, unauthenticated endpoints, run from 10 named regions. It is never built from user reports or from Mailchimp's own status page, and it does not change once this incident closes: this page is the permanent record, not a live view.

See Mailchimp's full evidence record or read the methodology.