Best Online Tutorials

SQL Tutorial

Free SQL Tutorial

SQL Interview Questions

SQL Practice Questions

SQL Tips & Tricks

SQL Errors

SQL Books

Angular Tutorial

Free Angular Tutorial

Angular Interview Questions

Angular Practice Questions

Angular Tips & Tricks

Angular Errors

Angular Books

Node.js Tutorial

Free Node.js Tutorial

Node.js Interview Questions

Node.js Practice Questions

Node.js Tips & Tricks

Node.js Errors

Node.js Books

React.js Tutorial

Free React.js Tutorial

React.js Interview Questions

React.js Practice Questions

React.js Tips & Tricks

React.js Errors

React.js Books

SSIS Tutorial

Free SSIS Tutorial

SSIS Interview Questions

SSIS Practice Questions

SSIS Tips & Tricks

SSIS Errors

SSIS Books

SEO Tutorial

Free SEO Tutorial

SEO Interview Questions

SEO Practice Questions

SEO Tips & Tricks

SEO Errors

SEO Books

Javascript Tutorial

Free Javascript Tutorial

Javascript Interview Questions

Javascript Practice Questions

Javascript Tips & Tricks

Javascript Errors

Javascript Books

MongoDB Tutorial

Free MongoDB Tutorial

MongoDB Interview Questions

MongoDB Practice Questions

MongoDB Tips & Tricks

MongoDB Errors

MongoDB Books

Next.js Tutorial

Free Next.js Tutorial

Next.js Interview Questions

Next.js Practice Questions

Next.js Tips & Tricks

Next.js Errors

Next.js Books

Node.js - DNS 

Prashant Surya  |   Nov 19, 2019  |  Views: 13

Description:

DNS in node.js is the module which provides API to work with dns ans dns servers.

For example:

1. dns.lookup():
const dns = require('dns');
dns.lookup('iana.org', (err, address, family) => {
  console.log('address: %j family: IPv%s', address, family);
});
// address: "192.0.43.8" family: IPv4


2. dns.reverse():
const dns = require('dns');
dns.resolve4('archive.org', (err, addresses) => {
  if (err) throw err;
  console.log(`addresses: ${JSON.stringify(addresses)}`);
  addresses.forEach((a) => {
    dns.reverse(a, (err, hostnames) => {
      if (err) {
        throw err;
      }
      console.log(`reverse for ${a}: ${JSON.stringify(hostnames)}`);
    });
  });
});

dns module have class: Resolver which provides following methods:

  • resolver.getServers()
  • resolver.resolve()
  • resolver.resolve4()
  • resolver.resolve6()
  • resolver.resolveAny()
  • resolver.resolveCname()
  • resolver.resolveMx()
  • resolver.resolveNaptr()
  • resolver.resolveNs()
  • resolver.resolvePtr()
  • resolver.resolveSoa()
  • resolver.resolveSrv()
  • resolver.resolveTxt()
  • resolver.reverse()
  • resolver.setServers()



Comments:
Content Contributor
Prashant Surya

Prashant Surya

Software developer at Uniserve Data Technologies Pvt. Ltd.  |   Noida, Uttar Pradesh, India

I am a software developer, freelancer and trainer working on technologies likes. MEAN stack, MERN Stack, ASP.NET full stack, WebRTC, socket.io ,PWA, SQL, JavaScript, jQuery, HTML, CSS, SEO, responsive UI/UX designing... having 7 years of experience in development in multiple domains like, eCommerce, RTA, capital markets, education, real estate...


Read related articles

Node.js - Modules

Prashant Surya  |   Dec 26, 2019  |  Views: 20

Node.js - Cluster

Prashant Surya  |   Nov 19, 2019  |  Views: 18

Node.js - IPC

Prashant Surya  |   Nov 19, 2019  |  Views: 19

Node.js - OS

Prashant Surya  |   Nov 19, 2019  |  Views: 14

Node.js - Global Objects

Prashant Surya  |   Nov 19, 2019  |  Views: 25

Node.js - Command Line Options

Prashant Surya  |   Nov 19, 2019  |  Views: 28

Node.js - Callbacks

Prashant Surya  |   Nov 19, 2019  |  Views: 22

Node.js - NPM

Prashant Surya  |   Nov 19, 2019  |  Views: 14

Node.js - REPL

Prashant Surya  |   Nov 19, 2019  |  Views: 13

Node.js - Console

Prashant Surya  |   Nov 19, 2019  |  Views: 18

Node.js - First Example

Prashant Surya  |   Nov 19, 2019  |  Views: 21

Node.js - Installation

Prashant Surya  |   Nov 19, 2019  |  Views: 16

Node.js - Introduction

Prashant Surya  |   Nov 19, 2019  |  Views: 22

Node.js - Http

Prashant Surya  |   Nov 19, 2019  |  Views: 14

Node.js - Timer

Prashant Surya  |   Nov 19, 2019  |  Views: 24

Node.js - Crypto

Prashant Surya  |   Nov 19, 2019  |  Views: 18

Node.js - Errors

Prashant Surya  |   Nov 19, 2019  |  Views: 27

Node.js - File System

Prashant Surya  |   Nov 19, 2019  |  Views: 16

Node.js - Http/2

Prashant Surya  |   Nov 19, 2019  |  Views: 15

Node.js - Query String

Prashant Surya  |   Nov 19, 2019  |  Views: 17

Node.js - Async Hooks

Prashant Surya  |   Nov 19, 2019  |  Views: 29

Node.js - Https

Prashant Surya  |   Nov 19, 2019  |  Views: 18

Node.js - String Decoder

Prashant Surya  |   Nov 19, 2019  |  Views: 25

Node.js - DNS

Prashant Surya  |   Nov 19, 2019  |  Views: 14

Node.js - Debugger

Prashant Surya  |   Nov 19, 2019  |  Views: 17

Node.js - TLS/SSL

Prashant Surya  |   Nov 19, 2019  |  Views: 26

Node.js - Child Process

Prashant Surya  |   Nov 19, 2019  |  Views: 28

Node.js - Process

Prashant Surya  |   Nov 19, 2019  |  Views: 24

Node.js - Streams

Prashant Surya  |   Nov 19, 2019  |  Views: 16

Node.js - Net

Prashant Surya  |   Nov 19, 2019  |  Views: 15

Node.js - Crypto

Prashant Surya  |   Nov 19, 2019  |  Views: 22

Node.js - Performance Hooks

Prashant Surya  |   Nov 19, 2019  |  Views: 14

Node.js - Path

Prashant Surya  |   Nov 19, 2019  |  Views: 17

Node.js - StringDecoder

Prashant Surya  |   Nov 19, 2019  |  Views: 24

Node.js - Assertion

Prashant Surya  |   Nov 19, 2019  |  Views: 11

Node.js - Query String

Pooja Goel  |   Nov 19, 2019  |  Views: 16

Node.js - Callbacks

Prashant Surya  |   Nov 19, 2019  |  Views: 18

Node.js - Buffers

Prashant Surya  |   Nov 19, 2019  |  Views: 21

Node.js - Events

Prashant Surya  |   Nov 19, 2019  |  Views: 24

Node.js - ZLIB

Prashant Surya  |   Nov 19, 2019  |  Views: 22

Node.js - TTY

Prashant Surya  |   Nov 19, 2019  |  Views: 15

Node.js - Trace Events

Prashant Surya  |   Nov 19, 2019  |  Views: 15

Node.js - Worker Threads

Prashant Surya  |   Nov 19, 2019  |  Views: 15

Node.js - Web Modules

Prashant Surya  |   Nov 19, 2019  |  Views: 16

Want to sell your software ?-

If you want to sell your readymade software to the genuine clients or businessman, list your software with details and demo links.

  • Sell ERP
  • Sell Website Clones
  • Sell App Clones
  • Sell Readymade Portals
  • Sell Readymade Websites
  • Sell Mobile Apps
  • Sell Window Apps

Clients will find it using our advanced search filter and will contact you directly.

No any charge for the product lsiting.

Do you own a Company ?+

Property.sale

Buy or Sell Commercial Property+

Are you a freelancer ?+

Looking for a job ?+

Are you a Service Provider ?+

Are you a blogger ?+

Do you own an IT Institute ?+



Property.sale