Get reliable resolvers for DNS recon and subdomain enumeration

publicdns.py

import requests
import csv

PUBDNS_URL = 'https://public-dns.info/nameservers.csv'

def fetch_valid_resolvers():
    r = requests.get(PUBDNS_URL)
    d = csv.DictReader(r.content.decode().splitlines(),delimiter=',')
    valid = [row['ip_address'] for row in d if row['reliability'] == '1.00' and ':' not in row['ip_address']]
    for i in valid:
        print(i)
    

if __name__ == '__main__':
    # run dnsvalidator after
    fetch_valid_resolvers()