Get Local Ip Address

Get local IP address

To get local Ip Address:

public static string GetLocalIPAddress()
{
    var host = Dns.GetHostEntry(Dns.GetHostName());
    foreach (var ip in host.AddressList)
    {
        if (ip.AddressFamily == AddressFamily.InterNetwork)
        {
            return ip.ToString();
        }
    }
    throw new Exception("No network adapters with an IPv4 address in the system!");
}

To check if you're connected or not:

System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();

Get local IP address in Node.js

This information can be found in os.networkInterfaces(), — an object, that maps network interface names to its properties (so that one interface can, for example, have several addresses):

'use strict';

const { networkInterfaces } = require('os');

const nets = networkInterfaces();
const results = Object.create(null); // Or just '{}', an empty object

for (const name of Object.keys(nets)) {
    for (const net of nets[name]) {
        // Skip over non-IPv4 and internal (i.e. 127.0.0.1) addresses
        // 'IPv4' is in Node <= 17, from 18 it's a number 4 or 6
        const familyV4Value = typeof net.family === 'string' ? 'IPv4' : 4
        if (net.family === familyV4Value && !net.internal) {
            if (!results[name]) {
                results[name] = [];
            }
            results[name].push(net.address);
        }
    }
}

// 'results'
{
  "en0": [
    "192.168.1.101"
  ],
  "eth0": [
    "10.0.0.101"
  ],
  "<network name>": [
    "<ip>",
    "<ip alias>",
    "<ip alias>",
    ...
  ]
}

// results["en0"][0]
"192.168.1.101"

How do I get the local IP address in Go?

You need to loop through all network interfaces

ifaces, err := net.Interfaces()
// handle err
for _, i := range ifaces {
    addrs, err := i.Addrs()
    // handle err
    for _, addr := range addrs {
        var ip net.IP
        switch v := addr.(type) {
        case *net.IPNet:
                ip = v.IP
        case *net.IPAddr:
                ip = v.IP
        }
        // process IP address
    }
}

Play (taken from util/helper.go)

How to get and store the localhost ip address into a variable (Windows 10)

To find your IP address on Windows 10, using the command prompt, you can use the following command, ipconfig/all and press Enter. Your IP Address will display along with other LAN details.

How to get the primary IP address of the local machine on Linux and OS X?

Use grep to filter IP address from ifconfig:

ifconfig | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1'

Or with sed:

ifconfig | sed -En 's/127.0.0.1//;s/.*inet (addr:)?(([0-9]*\.){3}[0-9]*).*/\2/p'

If you are only interested in certain interfaces, wlan0, eth0, etc. then:

ifconfig wlan0 | ...

You can alias the command in your .bashrc to create your own command called myip for instance.

alias myip="ifconfig | sed -En 's/127.0.0.1//;s/.*inet (addr:)?(([0-9]*\.){3}[0-9]*).*/\2/p'"

A much simpler way is hostname -I (hostname -i for older versions of hostname but see comments). However, this is on Linux only.

How to get the local IP of the PC?

You are missing to filter the IP by type (v4). Anyway you can have multiple IP v4 addresses on your PC (for example you can have 2 interfaces, LAN and Wi-Fi).

The following code gets the list of available IP v4.

List<string> ips = new List<string>();

System.Net.IPHostEntry entry = System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName());

foreach (System.Net.IPAddress ip in entry.AddressList)
    if (ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
        ips.Add(ip.ToString());

How to get local ip address python?

You can use this code:

import socket
hostname = socket.getfqdn()
print("IP Address:",socket.gethostbyname_ex(hostname)[2][1])

or this to get public ip:

import requests
import json
print(json.loads(requests.get("https://ip.seeip.org/jsonip?").text)["ip"])

How to get local IP address of Windows system?

To enumerate local IP addresses, use the Win32 API GetAdaptersInfo() (supports IPv4 only) or GetAdaptersAddresses() (supports IPv4 and IPv6) function. C/C++ examples are included in their documentation.

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