# DisassociateIpamByoasn
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Remove the association between your Autonomous System Number (ASN) and your BYOIP CIDR. You may want to use this action to disassociate an ASN from a CIDR or if you want to swap ASNs. For more information, see [Tutorial: Bring your ASN to IPAM](https://docs.amazonaws.cn/vpc/latest/ipam/tutorials-byoasn.html) in the *Amazon VPC IPAM guide*.

## 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).

 **Asn**   
A public 2-byte or 4-byte ASN.  
Type: String  
Required: Yes

 **Cidr**   
A BYOIP CIDR.  
Type: String  
Required: Yes

 **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

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

 **asnAssociation**   
An ASN and BYOIP CIDR association.  
Type: [AsnAssociation](API_AsnAssociation.md) object

 **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/DisassociateIpamByoasn) 
+  [Amazon SDK for .NET V4](https://docs.amazonaws.cn/goto/DotNetSDKV4/ec2-2016-11-15/DisassociateIpamByoasn) 
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/DisassociateIpamByoasn) 
+  [Amazon SDK for Go v2](https://docs.amazonaws.cn/goto/SdkForGoV2/ec2-2016-11-15/DisassociateIpamByoasn) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/DisassociateIpamByoasn) 
+  [Amazon SDK for JavaScript V3](https://docs.amazonaws.cn/goto/SdkForJavaScriptV3/ec2-2016-11-15/DisassociateIpamByoasn) 
+  [Amazon SDK for Kotlin](https://docs.amazonaws.cn/goto/SdkForKotlin/ec2-2016-11-15/DisassociateIpamByoasn) 
+  [Amazon SDK for PHP V3](https://docs.amazonaws.cn/goto/SdkForPHPV3/ec2-2016-11-15/DisassociateIpamByoasn) 
+  [Amazon SDK for Python](https://docs.amazonaws.cn/goto/boto3/ec2-2016-11-15/DisassociateIpamByoasn) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/DisassociateIpamByoasn)