How can I check all domains for registration availability?

Question

linux

Is there any way to directly request information about the availability of a domain somewhere, whether it is free or not?
I find that there are paid apis, how can you make a similar service for yourself?
Maybe someone understands this issue well?

Answer 1

https://en.wikipedia.org/wiki/WHOIS
https://ru.wikipedia.org/wiki/WHOIS

Answer 2

digdomain.com

Answer 3

Only registrars in a specific zone have unlimited access to check domains. For ordinary mortals, access is limited to the number of requests per hour.
If you do not have a million requests per day, then you can easily do it through the console with the whois utility.

Answer 4

discover linux and the whois command. Unless there may be modern exotic zones like cars and so on ..