Get subdomain list and check whether they are active or not by each response code. Using API by c99.nl

▶ go install github.com/abaykan/getsubdomain@latest

Put your API_KEY in ~/.config/c99.txt:

▶ echo "<YOUR_API_KEY>" > ~/.config/c99.txt

• Single Domain

▶ echo "kustirama.id" | getsubdomain

or

▶ echo "kustirama.id" | getsubdomain clean

• From List

▶ cat domainlist.txt | getsubdomain

or

▶ cat domainlist.txt | getsubdomain clean

• Single Domain

• From Domain List

For my own learning purpose. These codes are messy af. Feel free to contribute so I know how to code properly.
Don't expect anything new or ground breaking, I'm just following tutorials.