How to stop unwanted sales calls

Unwanted sales calls are regulated in many countries. Opt-out registries let you limit commercial calls for free.

In France, telemarketing now uses dedicated prefixes (0162, 0270, 0377, 0424, 0568, 0948, 0949), which makes such calls easy to identify and block.

For automatic protection, an app like Who Called blocks these official prefixes and community-reported numbers before your phone even rings.