@bruno29a OP is after a reverse DNS lookup. It can be done, but the results aren’t nice URLs. Won’t work for any IP though, as you mentioned.
Windows utility:
How to convert an IP address to a URL - Quora
Java, see Clint’s answer:
Need to perform a reverse DNS lookup of a particular IP address in java - Stack Overflow
Normal DNS lookup with Java Snippet in our Forum:
DNS lookup with KNIME - KNIME Analytics Platform - KNIME Community Forum
OP has already found that one though.