# AvailabilityZoneAddress

Configuration for a specific Availability Zone in a Regional NAT Gateway.

This is used to manually specify which EIPs to use in each AZ.

- Source: [`aws-ec2/lib/nat.ts`](https://github.com/aws/aws-cdk/blob/v2.275.0/packages/aws-cdk-lib/aws-ec2/lib/nat.ts#L196)
- Type last changed: v2.272.0 · 30 Sep 2026

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_ec2 as ec2 } from 'aws-cdk-lib';
const availabilityZoneAddress: ec2.AvailabilityZoneAddress = {
  allocationIds: ['allocationIds'],

  // the properties below are optional
  availabilityZone: 'availabilityZone',
  availabilityZoneId: 'availabilityZoneId',
};
```

## Properties

- `allocationIds`: string[] (required) — The allocation IDs of the Elastic IP addresses to be used for handling outbound NAT traffic in this specific Availability Zone.

- `availabilityZone`: string — The Availability Zone where this specific NAT gateway configuration will be active.

  **Default:** Use availabilityZoneId instead

  Either `availabilityZone` or `availabilityZoneId` must be specified.

- `availabilityZoneId`: string — The ID of the Availability Zone where this specific NAT gateway configuration will be active.

  **Default:** Use availabilityZone instead

  Either `availabilityZone` or `availabilityZoneId` must be specified.