hakrevdns
Small, fast tool for performing reverse DNS lookups en masse
...Written in Go, it converts IP addresses into associated hostnames by querying DNS PTR records. The software accepts lists of IP addresses through standard input, making it suitable for integration with other network reconnaissance tools. Its concurrent processing architecture allows multiple DNS requests to run simultaneously. Users can adjust thread counts, specify custom DNS resolvers, and load resolver lists from files. It supports both UDP and TCP DNS queries and can use system default resolvers. Results associate discovered hostnames with their corresponding IP addresses. ...