二级域名批量生成

import dns.resolver

def generate_subdomains(base_domain, prefixes):
    subdomains = []
    for prefix in prefixes:
        subdomain = f"{prefix}.{base_domain}"
        subdomains.append(subdomain)
    return subdomains

def check_subdomains(subdomains):
    for subdomain in subdomains:
        try:
            answers = dns.resolver.resolve(subdomain, 'A')
            print(f"{subdomain} is valid and resolves to: {answers[0].address}")
        except dns.resolver.NXDOMAIN:
            print(f"{subdomain} does not exist.")
        except dns.resolver.NoAnswer:
            print(f"{subdomain} exists but has no A records.")
        except dns.resolver.Timeout:
            print(f"{subdomain} timed out.")

if __name__ == "__main__":
    base_domain = "example.com"
    prefixes = ["www", "blog", "shop", "news", "forum"]
    subdomains = generate_subdomains(base_domain, prefixes)
    check_subdomains(subdomains)