It says starting at the end of November 2023, Canadians will be able to call 988 to be connected to a mental health crisis or suicide prevention service, free of charge.
The Public Health Agency of Canada will decide which group will provide the service, along with the scope of care it will offer.
The move will bring Canada in line with the United States, which launched its 988 service last month.
But the CRTC says it must first transition to 10-digit local dialing across the country.
As it stands, seven-digit local dialing is still the norm in Newfoundland and Labrador, northern Ontario and the Yellowknife area.
The CRTC has given a deadline of May 31, 2023, for service providers to implement 10-digit dialing across the country.
In the meantime, the CRTC notes that people in mental health distress can call Talk Suicide Canada at 1-833-456-4566.