import subprocess

dns_servers = [
    '14.4.4.1',
    '140.44.4.65',
    '14.4.4.44',
    '140.44.4.1',
    '140.44.4.70',
    '140.44.4.71',
    '1.1.1.1',
    '8.8.8.8'
]

for server in dns_servers:
    try:
        cmd = f"nslookup argo.snarfnet.net {server}"
        res = subprocess.run(cmd, capture_output=True, text=True, shell=True, timeout=5)
        print(f"=== DNS Server {server} ===")
        print(res.stdout.strip())
    except Exception as e:
        print(f"Server {server} failed: {e}")