When people started calling my personal mobile number with questions about a voluntary organisation I'm involved with, I was confused: we weren't sharing that number. It turns out that Google had decided to take the number I used to verify my identity for Google Business some years prior and start putting it in Google Search results. WTF, Google?
In the US the “standard” low cost line was listed in the white pages by default, you effectively paid extra - per month - for an unlisted number.
The operator information was basically a phone company employee reading the white pages info to you, for a fee.
As far as I remember in Italy the situation was different.
You can ask to delist the number when you sign the contract and it was free. I am not really sure if in the case you decided later to delist the number you needed to pay a one time fee for that, but keeping delisted was always free.
Italy, and all of Europe, have always had a greater respect for personal and a lesser respect for business’ profits than the U.S.