# DescribeIpamPolicies
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Describes one or more IPAM policies.

An IPAM policy is a set of rules that define how public IPv4 addresses from IPAM pools are allocated to Amazon resources. Each rule maps an Amazon service to IPAM pools that the service will use to get IP addresses. A single policy can have multiple rules and be applied to multiple Amazon Regions. If the IPAM pool run out of addresses then the services fallback to Amazon-provided IP addresses. A policy can be applied to an individual Amazon account or an entity within Amazon Organizations.

## Request Parameters
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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](CommonParameters.md).

 **DryRun**   
A check for 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

 **Filter.N**   
One or more filters for the IPAM policy description.  
Type: Array of [Filter](API_Filter.md) objects  
Required: No

 **IpamPolicyId.N**   
The IDs of the IPAM policies to describe.  
Type: Array of strings  
Required: No

 **MaxResults**   
The maximum number of results to return in a single call.  
Type: Integer  
Valid Range: Minimum value of 5. Maximum value of 1000.  
Required: No

 **NextToken**   
The token for the next page of results.  
Type: String  
Required: No

## Response Elements
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The following elements are returned by the service.

 **ipamPolicySet**   
Information about the IPAM policies.  
An IPAM policy is a set of rules that define how public IPv4 addresses from IPAM pools are allocated to Amazon resources. Each rule maps an Amazon service to IPAM pools that the service will use to get IP addresses. A single policy can have multiple rules and be applied to multiple Amazon Regions. If the IPAM pool run out of addresses then the services fallback to Amazon-provided IP addresses. A policy can be applied to an individual Amazon account or an entity within Amazon Organizations.  
Type: Array of [IpamPolicy](API_IpamPolicy.md) objects

 **nextToken**   
The token to use to retrieve the next page of results. This value is `null` when there are no more results to return.  
Type: String

 **requestId**   
The ID of the request.  
Type: String

## Errors
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For information about the errors that are common to all actions, see [Common client error codes](errors-overview.md#CommonErrors).

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon Command Line Interface V2](https://docs.amazonaws.cn/goto/cli2/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/ec2-2016-11-15/DescribeIpamPolicies) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/DescribeIpamPolicies)