查询域名有没有被使用

import whois

def check_domain_availability(domain_name):
    try:
        w = whois.whois(domain_name)
        if w.status == None:
            return f"{domain_name} is available."
        else:
            return f"{domain_name} is already registered."
    except Exception as e:
        return f"Error: {e}"

# 示例调用
print(check_domain_availability("example.com"))

import dns.resolver

def check_dns_resolution(domain_name):
    try:
        answers = dns.resolver.resolve(domain_name, 'A')
        return f"{domain_name} is resolved to {answers[0].address}."
    except dns.resolver.NXDOMAIN:
        return f"{domain_name} does not exist."
    except dns.resolver.NoAnswer:
        return f"{domain_name} exists but has no A records."
    except dns.resolver.Timeout:
        return f"Timeout while querying {domain_name}."
    except Exception as e:
        return f"Error: {e}"

# 示例调用
print(check_dns_resolution("example.com"))