How to get all domains of a specific tld?

Question

Domain Name System

Greetings,
A couple of research ideas have appeared, to test them, you need an up-to-date list of domains in a specific tld (for example, .ru).
In this regard, the question arose: How to get the entire up-to-date list of domains for a specific tld for free?
PS I know that you can buy ready-made lists, but I'm interested in the free option of getting an up-to-date list.
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PS2. ".ru" cited as an example, I'm interested in the ".us" zone. However, if you share information about other zones, I will also be grateful.

Answer 1

The list is on https://statonline.ru
All you need is an account in the register, this is their official subsidiary site, you can see it in their news