Download of Internet Protocol Address Calculator 2.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this free software for Mac is IP Calculator Administrator. The program lies within Internet & Network Tools, more precisely Network tools.
From the developer:
Internet Protocol Address Calculator is an open-source Java-based application. This calculator will assist network administrators to perform calculations over both IPv4 and IPv6 address space. A handy whois search client is also integrated into this tool.
You may want to check out more Mac applications, such as IP Address Menu, Router IP Address or NLA Timecode Calculator, which might be similar to Internet Protocol Address Calculator.