When you destroy a deployment, its IP addresses are deleted. The allocated IPs, for example the IPS in a network profile range, are released and made available for subsequent provisioning.
When you destroy a machine that has a static IP address, its IP address is made available for other machines to use. Unused addresses might not be available immediately because the process to reclaim static IP addresses runs every 30 minutes.
If you are using a third-party IPAM provider, vRealize Automation deletes the associated IP addresses by using the vRealize Orchestrator workflow in the third-party IPAM provider plug-in or package.