The NetBox IPAM Scanner is a NetBox / Python script which uses NMAP to scan the IPAM prefixes for online ip addresses to check which ones are live, add newly found ip addresses to the IPAM module in ...
Admittedly a rather obscure one that's not so easy to spot. NetBox DNS has a migration feature for IPAM DNSsync that can be used to deactivate existing address records when a managed record is created ...