Kentik - Network Observability
Kentik Network Analysis Center

Facebook suffers global outage

October 4, 2021
Facebook, Instagram, and WhatsApp all were unavailable due to a global outage impacting the popular social media services.

According to Kentik aggregate NetFlow data, internet traffic to Facebook services virtually disappeared at 15:39 UTC on Monday, October 4, 2021 with initial indications pointing to a DNS problem.

After 5.5 hours, we began seeing traffic to Facebook begin flowing again.

For more analysis of this outage, see Doug Madory’s blog post, “Facebook’s historic outage, explained.

Doug Madory

Doug Madory is the director of internet analysis for Kentik where he works on internet infrastructure analysis. The Washington Post dubbed him “The Man who can see the Internet” for his reputation in identifying significant developments in the global layout of the internet. Doug is regularly quoted by major news outlets about developments ranging from national blackouts to BGP hijacks to the activation of submarine cables. Prior to Kentik, he was the lead analyst for Oracle’s internet intelligence team (formerly Dyn Research and Renesys).

Twitter: @DougMadory

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Facebook, WhatsApp, Instagram Suffer Worldwide Outage

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About the data

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