Dns.GetHostEntry Method (IPAddress)


Resolves an IP address to an IPHostEntry instance.

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

static member GetHostEntry : 
        address:IPAddress -> IPHostEntry


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.

Exception Condition

address is null.


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.

IPv6 addresses are filtered from the results of the GetHostEntry method if the local computer does not have IPv6 installed. As a result, it is possible to get back an empty IPHostEntry instance if only IPv6 results where available for the address parameter.

The Aliases property of the IPHostEntry instance returned is not populated by this method and will always be empty.


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

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

No code example is currently available or this language may not be supported.


for accessing DNS information. Associated enumeration: PermissionState.Unrestricted

.NET Framework
Available since 2.0
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