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Dns.GetHostEntry Method (IPAddress)

Resolves an IP address to an IPHostEntry instance.

Namespace:  System.Net
Assembly:  System (in System.dll)

Public Shared Function GetHostEntry ( _
	address As IPAddress _
) As IPHostEntry
Dim address As IPAddress 
Dim returnValue As IPHostEntry 

returnValue = Dns.GetHostEntry(address)


Type: System.Net.IPAddress

An IP address.

Return Value

Type: System.Net.IPHostEntry
An IPHostEntry instance that contains address information about the host specified in address.


address is Nothing.


An error is encountered when resolving address.


address is an invalid IP address.

The GetHostEntry method queries a DNS server for the IP addresses and aliases associated with an IP address.


This member emits trace information when you enable network tracing in your application. For more information, see Network Tracing.

The following code example uses the GetHostEntry method to resolve an IP address to an IPHostEntry instance.

Public Sub DoGetHostEntry(hostName As [String])

    DIM host as IPHostEntry = Dns.GetHostEntry(hostname)

    Console.WriteLine("GetHostEntry(" + hostname + ") returns: ")

    Dim ip As IPAddress() = host.AddressList

    Dim index As Integer 
    For index = 0 To ip.Length - 1
    Next index
End Sub    
// Determine the Internet Protocol(IP) addresses for my host.
static void DoGetLocalHostAddress()
    IPAddress * myHost[] = Dns::GetLocalHostAddresses();

    Console::Write("IPs for my host: ");

    IEnumerator* ips = myHost->GetEnumerator();
    while (ips->MoveNext())
        Console::Write("{0} ", ips->Current);

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0