dig is a dns lookup program found in linux.

https://manpages.ubuntu.com/manpages/xenial/en/man1/dig.1.html

You just need to hook it up to some kind of scripting language to run the program and format the output. There is a batch mode included in dig that would help in cutting down the code required.

You don't. dig can only do a single query from a single name server at a time. You would need to use something like the code provided by angch to go through each of them separately.