Golang : Get the IPv4 and IPv6 addresses for a specific network interface


You need to find the IP address of a specific network interface on your machine for developing your application. Perhaps your machine has couple of network interfaces and your application needs to use a specific interface for security reason.

How to find the IP address either version 4 or 6?


Use net package Interfaces() function. Below is an example of how to use the Interfaces() to find out the available interfaces and then specify a network interface by name to list out the IP addresses.

NOTE : This example will enumerate all the available network interfaces. If you need to specify a particular interface on your machine, first find out the interface name and then plug in the name in net.InterfaceByName("name").

Here you go!

 package main

 import (

 func main() {

 // get available network interfaces for
 // this machine
 interfaces, err := net.Interfaces()

 if err != nil {

 for _, i := range interfaces {

 fmt.Printf("Name : %v \n", i.Name)

 byNameInterface, err := net.InterfaceByName(i.Name)

 if err != nil {

 //fmt.Println("Interface by Name : ", byNameInterface)

 addresses, err := byNameInterface.Addrs()

 for k, v := range addresses {

 fmt.Printf("Interface Address #%v : %v\n", k, v.String())


Sample output on my machine. Your machine result will be different.

Name : lo0

Interface Address #0 : ::1/128

Interface Address #1 :

Interface Address #2 : fe80::1/64


Name : gif0


Name : stf0


Name : en3

Interface Address #0 : fe80::1aa6:f7ff:fe16:e80b/64

Interface Address #1 :


If the network interface has no IP address, usually it means the status is DOWN.




  See also : Golang : How to detect a server/machine network interface capabilities?

By Adam Ng

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