aws ec2 deprovision-public-ipv4-pool-cidr
Deprovision a CIDR from a public IPv4 pool. AWS CLI reference
3 options Its page in the AWS CLI reference
Options
--cidrThe CIDR you want to deprovision from the pool.--dry-runA check for whether you have the required permissions for the action without actually making the request and provides an error response.--pool-idThe ID of the pool that you want to deprovision the CIDR from.