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The National Do Not Call List (DNCL) gives consumers a choice about whether to receive telemarketing calls. The National DNCL Rules introduce new responsibilities for Canada’s telemarketers.
If you wish to reduce the number of telemarketing calls you receive, you may register your residential, wireless, fax, or VoIP telephone number(s) on the National Do Not Call List (DNCL).

https://www.lnnte-dncl.gc.ca/ind/accueil-home-eng