[dns-operations] check if a domain has been registered via DNS

[Daniel Kalchev]

> On 29.04.2017 г., at 9:32, Patrik Fältström <paf at frobbit.se> wrote:
> 
> On 29 Apr 2017, at 1:24, David Conrad wrote:
> 
>> Use of RDAP here seems largely irrelevant to the use case Mark and Paul are talking about, i.e., automated bulk queries.
>> 
>> Do you think registries/registrars will not rate limit RDAP (differentiated access or not)?
> 
> Of course they will. Just like any kind of differential access.
> 
> So the questions I think are:
> 
> 1. Will there be differential access to whois data?
> 
> Answer: Yes, there is already that, although implemented in a clumsy way with whois/tcp/53 and much easier implemented with RDAP.
> 

What is the drama with TCP port 53?

Daniel