Get IP address and hostname from local machine

In this example we shall show you how to retrieve the IP address and hostname from the local host. To get the IP address and hostname from the local machine one should perform the following steps :

  • Retrieve the Address object for the local host. This object contains all address related information about the specific host
  • Use the getAddress() API method to get a byte array representation of the IP address of the specific host. In order to convert the byte array representation to a more readable one you may perform a conversion like the one shown in the code snippet below
  • Use the getHostName() API method to retrieve the hostname of the specific host
  • as demonstrated in the code snippet that follows.

package com.javacodegeeks.snippets.core;


public class GetIPAddressAndHostnameFromLocalMachine {
	public static void main(String[] args) {
		try {
			InetAddress inetAddr = InetAddress.getLocalHost();
			byte[] addr = inetAddr.getAddress();

			// Convert to dot representation
			String ipAddr = "";
			for (int i = 0; i < addr.length; i++) {
				if (i > 0) {
					ipAddr += ".";
				ipAddr += addr[i] & 0xFF;
			String hostname = inetAddr.getHostName();
			System.out.println("IP Address: " + ipAddr);
			System.out.println("Hostname: " + hostname);
		catch (UnknownHostException e) {
			System.out.println("Host not found: " + e.getMessage());


This was an example of how to get the IP and hostname of the local host in Java.

Byron Kiourtzoglou

Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.
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