Cloudflare summed it up nicely: 
https://blog.cloudflare.com/october-2021-facebook-outage/

Rob++

----- Original Message -----
> From: "Jason Kuehl via Outages" <[email protected]>
> To: "Jason Kuehl via Outages" <[email protected]>
> Sent: Monday, October 4, 2021 11:26:52 AM
> Subject: Re: [outages] Facebook.com no records?

> A carrier networking engineer friend of mine observed that the network that
> those DNS servers live in is no longer in the global routing table. Sounds 
> like
> BGP issues rather than DNS ones, I guess. (I won’t admit to understanding 
> BGP.)
> 
> -Rich
> 
> Rich Lafferty

-- 
Internet: [email protected]
Life: Rob@Van_Alstyne.Texas.USA.Earth

"They couldn't hit an elephant at this distance."
  -- Major General John Sedgwick
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