This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::EC2::IPAMResourceDiscovery IpamOperatingRegion
<a name="aws-properties-ec2-ipamresourcediscovery-ipamoperatingregion"></a>

The operating Regions for an IPAM. Operating Regions are Amazon Regions where the IPAM is allowed to manage IP address CIDRs. IPAM only discovers and monitors resources in the Amazon Regions you select as operating Regions.

For more information about operating Regions, see [Create an IPAM](https://docs.amazonaws.cn//vpc/latest/ipam/create-ipam.html) in the *Amazon VPC IPAM User Guide*.

## Syntax
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To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-ec2-ipamresourcediscovery-ipamoperatingregion-syntax.json"></a>

```
{
  "[RegionName](#cfn-ec2-ipamresourcediscovery-ipamoperatingregion-regionname)" : String
}
```

### YAML
<a name="aws-properties-ec2-ipamresourcediscovery-ipamoperatingregion-syntax.yaml"></a>

```
  [RegionName](#cfn-ec2-ipamresourcediscovery-ipamoperatingregion-regionname): String
```

## Properties
<a name="aws-properties-ec2-ipamresourcediscovery-ipamoperatingregion-properties"></a>

`RegionName`  <a name="cfn-ec2-ipamresourcediscovery-ipamoperatingregion-regionname"></a>
The name of the operating Region.  
*Required*: Yes  
*Type*: String  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)