如何检测域名已经解析

nslookup example.com

dig example.com

host example.com

import socket

def check_domain_resolution(domain):
    try:
        ip_address = socket.gethostbyname(domain)
        return f"{domain} resolved to {ip_address}"
    except socket.gaierror:
        return f"{domain} could not be resolved"

print(check_domain_resolution("example.com"))

const dns = require('dns');

function checkDomainResolution(domain, callback) {
    dns.resolve(domain, (err, addresses) => {
        if (err) {
            callback(`${domain} could not be resolved`);
        } else {
            callback(`${domain} resolved to ${addresses}`);
        }
    });
}

checkDomainResolution('example.com', (result) => {
    console.log(result);
});