Can confirm. From Germany, have the same number for 15+ years, basically any provider has this number and probably leaked it at some time. Still no spam at all. I think there are heavy penalties for that in Germany.

In the Czech Republic I get like one spam call per year, and it’s usually semi-relevant (carrier, bank, insurance), virtually zero scams or blind marketing calls.

Same phone number for 17 years, dozens and dozens of companies have seen it.