How to open Part 42 of a multi-volume archive: a split or compressed file .042 files
Have you had trouble opening the 042 file on your computer? What are 042 files? We explain what they are and recommend software that we know will open them.
What is 042 file?
A 042 file extension is related to split file or compressed file from a multi-volume archive (part 42).
Part 42 of a multi-volume archive: a split or compressed file description
The 042 file extension is generally used for split files. A part of larger file split using splitter software, such us HJSplit, WellTek 001 File Joiner & Splitter, SplitJoin or File Managers, such as Total Commander.
It is also associated with several archivers or compression tools, which are using, or did use in the past, the 042 file extension for its multi-volume files or archives, such as Winrar or 7-Zip.
In case of split files, you will need to merge them first with the use of the splitting/joining software tool, before you can open or work with them. If the files are compressed multi-volume archives, you will have to extract the first one and it will automatically continue to extract all the parts. In either case, you will need ALL the parts to access the original content.
Suggested software to open 042 file

WinRAR
One of the oldest and most popular shareware file archiver and data compression utility