Data Broker Issues:

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Persistence of Calls: It can take up to 31 days for telemarketers to update their lists after you register your number, so you may still receive calls during this period.
Global Reach: DNC registries are typically national in scope. While some international cooperation exists, a number registered in one country's DNC list may not protect against calls originating from another country if that slovenia phone number list country has no similar regulations or enforcement capabilities.


Even if a number is on a DNC list, it might still be present in various databases maintained by data brokers, which are then sold to businesses. While the DNC list restricts calling, it doesn't necessarily remove your number from these underlying data sources, which could lead to other forms of unsolicited contact (e.g., direct mail).