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From: SH <i.love@spam.com>
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Subject: Re: Public DNS Services
Date: Tue, 3 Sep 2024 08:39:11 +0100
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On 02/09/2024 02:51, Lawrence D'Oliveiro wrote:
> We all know about the public DNS services offered by Google (8.8.8.8,
> 8.8.4.4) and Cloudflare (1.1.1.1, 1.0.0.1); did you know these
> addresses have names as well? And of course there are IPv6 addresses to
> go with the IPv4 ones.
> 
> Try this command to find out all the related Google DNS services:
> 
>      host -a dns.google.
> 
> (Yup, that’s “dns.google.”, no “.com” or anything else on the end.)
> That’s quite a breathtaking list of entries.
> 
> For Cloudflare, try
> 
>      host one.one.one.one.
> 
> Note that the “-a” option (“tell me everything”) doesn’t work with
> Cloudflare; quite a few online services are now imposing restrictions
> on these “all info” lookups, but clearly not Google, at least not on
> this domain: obviously they want it to remain easy for people to
> discover the services they’re offering.

C:\Users\public>host

'host' is not recognized as an internal or external command,
operable program or batch file.

(On Windows 11)