Запросы к DNS

# запрашиваем ip адрес для хоста
import socket

def get_ips_for_host(host):
    try:
        ips = socket.gethostbyname_ex(host)
    except socket.gaierror:
        ips=[]
    return ips

ips = get_ips_for_host('yandex.ru')
for ip in ips[2]:
    print(ip)


# запрашиваем ip адрес для хоста через определенный DNS
# pip install dnspython
import dns.resolver

host = "online.ru"

myResolver = dns.resolver.Resolver()
myResolver.nameservers = ['8.8.8.8', '8.8.4.4']

try:
        myAnswers = myResolver.query(host, "A")
        for rdata in myAnswers:
                print (rdata)
except:
        print ("Query failed")