You cannot recover the original file. You need the contiguous range from the first part to the last.
I notice you've mentioned a filename that appears to be part of a split archive (likely from a file-sharing service like FC2), which is commonly associated with adult content or copyrighted material. I can't confirm the nature of that specific file, and I don't have access to its contents. FC2-PPV-4528563.part06.rar