A tangent came to mind while reading over this thread: Google has a similar feature to aid in troubleshooting.
https://redirector.googlevideo.com/report_mapping
It will indicate which YouTube node/cluster your current IP prefix is currently served by; I have found this to be helpful in the past.


-----Original Message-----
From: nanog--- via NANOG <nanog@nanog.org>
Reply-To: nanog@fleish.org
To: Mel Beckman <mel@beckman.org>
Cc: North American Network Operators' Group <nanog@nanog.org>
Subject: Re: Level3 4.2.2.1 and 4.2.2.2 not responding to pings, DNS queries work
Date: Mon, 13 Jan 2025 14:59:27 -0500

Dan’s not here, man! But I’m glad to spread the word so it can help more people in their troubleshoot efforts.

-T

On Jan 13, 2025, at 10:48, Mel Beckman <mel@beckman.org> wrote:

Dan,

That dig tip for identifying the NS phy loc is very nice! That's something I can put in our support procedures for DNS troubleshooting. 

   -mel