Anonip replaces all IP addresses in a text file with a seemingly random one in a intelligent way. It is intended to anonymize the sensitive IP data in a file so that this file can be distributed without exposing one to security or privacy risks.
You can download it from the following link: https://packetstormsecurity.com/files/download/96381/anonip-0.1.tar.gz
Source: https://packetstormsecurity.com/files/96381/Anonip-IP-Address-Anonymizer-0.1.html