Does chkdns do url validation, i think we need to validate if is a valid url before make the request

In app.py file,
Change this:
answer = ", ".join(answer.split()[-1] for answer in data["answers"])

to this:
if type=='SOA':
answer = data['response'][0].split(' ', 2)
answer = ' '.join(answer)
else:
answer = ", ".join(answer.split()[-1] for answer in data["answers"])

This will display the correct result for SOA type