What information can you realistically get from a reverse phone lookup in Italy? I’m mainly interested in whether the number is mobile or landline, its possible area, business connection, and any spam reports.

A reverse lookup can sometimes provide useful clues, but I wouldn’t expect it to reveal private subscriber information for every Italian number. Depending on the number, you may find details about whether it is mobile or landline, possible geographic information, business associations, or user reports. I’d start with https://scannero.com/who-called-me/italy/ and see what comes up. If you need to verify a company, I’d then compare those results with the company’s own published contact information.