UnassignPrivateNatGatewayAddress - Amazon Elastic Compute Cloud


Unassigns secondary private IPv4 addresses from a private NAT gateway. You cannot unassign your primary private IP. For more information, see Edit secondary IP address associations in the Amazon VPC User Guide.

While unassigning is in progress, you cannot assign/unassign additional IP addresses while the connections are being drained. You are, however, allowed to delete the NAT gateway.

A private IP address will only be released at the end of MaxDrainDurationSeconds. The private IP addresses stay associated and support the existing connections, but do not support any new connections (new connections are distributed across the remaining assigned private IP address). After the existing connections drain out, the private IP addresses are released.

Request Parameters

The following parameters are for this specific action. For more information about required and optional parameters that are common to all actions, see Common Query Parameters.


Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation. Otherwise, it is UnauthorizedOperation.

Type: Boolean

Required: No


The maximum amount of time to wait (in seconds) before forcibly releasing the IP addresses if connections are still in progress. Default value is 350 seconds.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 4000.

Required: No


The ID of the NAT gateway.

Type: String

Required: Yes


The private IPv4 addresses you want to unassign.

Type: Array of strings

Required: Yes

Response Elements

The following elements are returned by the service.


Information about the NAT gateway IP addresses.

Type: Array of NatGatewayAddress objects


The ID of the NAT gateway.

Type: String


The ID of the request.

Type: String


For information about the errors that are common to all actions, see Common client error codes.

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: