System.Net.IPInterfaceAddress – .NET API Documentation

Namespace

System.Net

Class

IPInterfaceAddress

Provides information about an IP address and the network interface to which it is bound.

Inheritance

System.Object → System.Net.IPInterfaceAddress

Properties

Name	Type	Description
Address	IPAddress	The IP address assigned to the interface.
PrefixLength	int	The length of the network prefix (subnet mask) in bits.
NetworkInterface	NetworkInterface	The network interface that the address belongs to.
IsDnsEligible	bool	Indicates whether the address is DNS-eligible.
IsTransient	bool	Specifies whether the address is transient (e.g., DHCP assigned).

Methods

public override string ToString();

Returns a string that represents the current IPInterfaceAddress.

Examples

PowerShell

// Retrieve all IPInterfaceAddress objects on the local machine
using System;
using System.Net;
using System.Net.NetworkInformation;

class Program
{
    static void Main()
    {
        foreach (NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
        {
            IPInterfaceProperties ipProps = ni.GetIPProperties();
            foreach (UnicastIPAddressInformation addr in ipProps.UnicastAddresses)
            {
                var ipInterface = new IPInterfaceAddress
                {
                    Address = addr.Address,
                    PrefixLength = addr.PrefixLength,
                    NetworkInterface = ni,
                    IsDnsEligible = addr.IsDnsEligible,
                    IsTransient = addr.IsTransient
                };

                Console.WriteLine(ipInterface);
            }
        }
    }
}

# List IPInterfaceAddress information using PowerShell
Get-NetIPAddress | ForEach-Object {
    $interface = Get-NetIPInterface -InterfaceIndex $_.InterfaceIndex
    [PSCustomObject]@{
        Address        = $_.IPAddress
        PrefixLength   = $_.PrefixLength
        InterfaceAlias = $interface.InterfaceAlias
        IsDnsEligible  = $_.AddressState -eq 'Preferred'
        IsTransient    = $_.AddressFamily -eq 'IPv4' -and $_.State -eq 'Preferred'
    }
} | Format-Table -AutoSize