# AssociateIpamByoasn
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Associates your Autonomous System Number (ASN) with a BYOIP CIDR that you own in the same AWS Region. 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*.

After the association succeeds, the ASN is eligible for advertisement. You can view the association with [DescribeByoipCidrs](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeByoipCidrs.html). You can advertise the CIDR with [AdvertiseByoipCidr](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_AdvertiseByoipCidr.html).

## 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**   
The BYOIP CIDR you want to associate with an ASN.  
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**   
The 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 AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/ec2-2016-11-15/AssociateIpamByoasn) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/AssociateIpamByoasn)