aws ec2 disassociate-ipam-byoasn
Remove the association between your Autonomous System Number (ASN) and your BYOIP CIDR. AWS CLI reference
3 options Its page in the AWS CLI reference
Options
--asnA public 2-byte or 4-byte ASN.--cidrA BYOIP CIDR.--dry-runChecks whether you have the required permissions for the action, without actually making the request, and provides an error response.