# DescribeIpamByoasn


Describes your Autonomous System Numbers (ASNs), their provisioning statuses, and the BYOIP CIDRs with which they are associated. For more information, see [Tutorial: Bring your ASN to IPAM](https://docs.aws.amazon.com/vpc/latest/ipam/tutorials-byoasn.html) in the *Amazon VPC IPAM guide*.

## 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](CommonParameters.md).

 **DryRun**   
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

 **MaxResults**   
The maximum number of results to return with a single call. To retrieve the remaining results, make another call with the returned `nextToken` value.  
Type: Integer  
Valid Range: Minimum value of 1. Maximum value of 100.  
Required: No

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

## Response Elements


The following elements are returned by the service.

 **byoasnSet**   
ASN and BYOIP CIDR associations.  
Type: Array of [Byoasn](API_Byoasn.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


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

## See Also


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