aws ec2 deprovision-byoip-cidr
Releases the specified address range that you provisioned for use with your Amazon Web Services resources through bring your own IP addresses (BYOIP) and deletes the corresponding address pool. AWS CLI reference
2 options Its page in the AWS CLI reference
Options
--cidrThe address range, in CIDR notation.--dry-runChecks whether you have the required permissions for the action, without actually making the request, and provides an error response.