Google DNS --- Figuring out which DNS Cluster you are using

Shaun nanog at
Thu Aug 24 04:21:28 UTC 2017

On Wed, 23 Aug 2017 20:09:49 +0000
Erik Sundberg <ESundberg at> wrote:

> Which Google DNS Server Cluster am I using. I am testing this from Chicago, IL
> # dig -t txt +short @
> ""                     <<<<<<DNS Server IP, reference the list above to get the cluster, Council Bluffs, IA
> "edns0-client-subnet"                                  <<<< Your Source IP Block

Worth noting, this record has TTL 60 and caching can cause unexpected
responses; you may have to try a few times to get the correct data. My
first attempt gave me an unrecognized "edns0-client-subnet" and a Google
IP from Finland when I was querying from Atlanta.


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