dns-info

#!/usr/bin/env python3

import socket, sys

def query_whois_server(domain, server, port=43):
    try:
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect((server, port))
        s.send((domain + "\r\n").encode())
        data = s.recv(4096)
        s.close()
        return data.decode('utf-8', errors='ignore')
    except Exception as e:
        print(f"Error querying {server}: {e}")
        return None

response_iana = query_whois_server(sys.argv[1], "whois.iana.org")

if not response_iana:
    sys.exit(1)

response_lines = response_iana.split("\n")
whois_server = None

for line in response_lines:
    if "whois:" in line.lower():
        whois_server = line.split(":")[1].strip()
        break

if not whois_server:
    print("Unable to find the responsible WHOIS server.")
    sys.exit(1)

response_final = query_whois_server(sys.argv[1], whois_server)

if response_final:
    print(response_final)
else:
    print(f"Unable to retrieve information for {sys.argv[1]} using server {whois_server}.")