[atlas] Is there a way to find the resolver used by the probe?

These measurement collect this information already for you:

IPv4: https://atlas.ripe.net/measurements/8310245/

IPv6: https://atlas.ripe.net/measurements/8310366/

They were set up as part of a larger project to collect data about DNS resolvers:
https://dnsthought.nlnetlabs.nl/raw/

— Moritz


> On 29 Jun 2021, at 04:26, Cameron Steel <tugzrida at gmail.com> wrote:
> 
> To some extent, yes.
> 
> In the JSON results download, the dst_addr key will provide the address that the probe sent its query to, however this will probably not be massively useful, as it’ll often be the address of a local router or other DNS cache.
> 
> Finding out what resolver a given client is using at the level of "is this Cloudflare/Google/Local ISP/etc" is a little harder and requires using either an NSID query, which you can set on Atlas measurements but may not be supported by all resolvers, or a "whoami" style service like Akamai’s: https://developer.akamai.com/blog/2018/05/10/introducing-new-whoami-tool-dns-resolver-information.
> 
> Hope that helps
> Cameron
> 
> 
>> On 29 Jun 2021, at 11:12, pravicha <pravicha at masonlive.gmu.edu> wrote:
>> 
>> Hello,
>> 
>> I’ve been trying to get dns measurements for a couple of domains over different regions using atlas probes. Is there a way to find the resolver’s IP used by the probes when use_probe_resolver is set to true?
>> 
>> Thanks
> 

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