question Affiliate script to check if domain names are available

[NewBob]

Hi! I have a newbie question: I've seen some people post lists of available domain names, presumably ones they do not buy themselves.

So there is a list of 100s of domain names, and you can click to check if the domain is still available at Hostgator, namesilo etc. If you click that button, it takes you to Hostgator etc through their affiliate link.

Does anyone know what this type of script is called? Is it custom or not?

I ask because I have an existing audience outsite domaining that would love if I posted lists like this

 

[NewBob]

Edit: I am looking for a script that does the same as "DNS Portfolio v1.7.0"