Since someone was having problems with the fearedbliss's Java-version of the code calculator, I took about 20 minutes of my precious time and quickly whipped up a web-version using Javascript. I'm not really a web-programmer, but I think it should work.  Xamino was kind and set up a Github-page to hold it: http://kingsongunlocker.github.io/ Fairly straightforward to use: input your ISN in the field (either with or without colons, like 64:1E:84:C3:D6:D4 or 641E84C3D6D4), hit enter or "C