ipregistry-rdns
Java library to perform reverse Domain Name Service (rDNS) lookups with ease.
The library is async, thread-safe and has built-in support for caching.
import co.ipregistry.rdns.ReverseDomainNameService; import java.net.InetAddress; final ReverseDomainNameService reverseDomainNameService = new ReverseDomainNameService(); final CompletableFuture<String> response = reverseDomainNameService.lookup(InetAddress.getByName("8.8.8.8")); Assertions.assertEquals("dns.google", response.get());