Right-click the first part ( melissa-11.7z.001 ) and select "Extract" using a tool like 7-Zip or WinRAR.

Melissa (formerly Melissa Data), a provider of global data quality and address verification tools.

You must have all parts in the same folder (e.g., .001 , .002 , and .003 ).

You can use Windows PowerShell to check the file's integrity using the command Get-FileHash -Algorithm SHA256 "melissa-11.7z.003" if you have the expected hash from the official documentation .