const dns = require('dns').promises;

// Promise-based API
async function lookupExample() {
  try {
    const result = await dns.lookup('www.example.com');
    console.log('IP address:', result.address);
    console.log('IP version: IPv' + result.family);
  } catch (err) {
    console.error('Lookup failed:', err);
  }
}

lookupExample();