public open resolver list?

Mon Feb 1 19:04:57 UTC 2021

On 10:49 01/02, Randy Bush wrote:
> >> is there a list of public resolvers?  e.g. 1.1.1.1, 4.4.4.4, 8.8.8.8,
> >> etc.?
> > 
> > https://public-dns.info/
> 
> interesting, but probably too broad.
> 
> but i suspect my question was too broad.
> 
> >> we have a measurement set which contains resolvers, some of which we
> >> suspect are intentionally open, some unintentionally open, and some
> >> not open.  we are trying to filter that first set, the intentionally
> >> open.
> 
> i suspect it hinges on what one thinks of as 'public'.  i.e. dtag's
> servers for its customers is not what i think of as public.  maybe
> i mean globally public or something.
> 
> randy, who clearly needs to think a bit more
> 

I don't know of an exhaustive list, but a while ago I collected these:

cloudflare 1.1.1.1 1.0.0.1 2606:4700:4700::1111 2606:4700:4700::1001
comodo: 8.26.56.26 8.20.247.20
dyn: 216.146.35.35 216.146.36.36
google: 8.8.8.8 8.8.4.4 2001:4860:4860::8888 2001:4860:4860::8844
level3: 4.2.2.2 4.2.2.1
norton: 199.85.126.10 199.85.127.10
opendns: 208.67.222.222 208.67.220.220
quad9: 9.9.9.9 149.112.112.112 2620:fe::fe 2620:fe::9
ultradns: 156.154.71.1 156.154.70.1

Hugo

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