The National Do Not Call List is a registry where individuals can add their phone numbers to prevent unsolicited telemarketing calls. While the DNCL primarily affects voice calls, businesses should be aware that phone numbers listed on the DNCL should not be contacted for telemarketing purposes.
Businesses are required to check their Canada Phone Number List phone number lists against the DNCL to avoid calling numbers that are on the list. However, the DNCL does not apply to SMS marketing. This means that while businesses need to be cautious with their phone calls, the DNCL does not regulate SMS outreach.
Rules for Telemarketing and SMS Marketing:
The CRTC's Telemarketing Rules also provide guidance on the proper conduct for telemarketers, including requiring a clear identification of the business, restrictions on call times, and rules on prerecorded messages. These rules apply to both voice calls and, in some cases, automated SMS messages.

CRTC Enforcement: The CRTC has the authority to investigate complaints about unsolicited SMS messages and can issue fines or other penalties for non-compliance with telemarketing and SMS rules.