If you're able to go above and beyond to help us during this important time, please consider making an additional financial contribution. Click here to contribute. On April 24, youâll need to start a new habit: Dial 10 digits when making a local phone call. It will be mandatory in October. Hereâs what you need to know. Whatâs going on? Thereâs going to be a nationwide deployment of a three-digit number to reach the National Suicide Prevention and Mental Health Crisis Lifeline: 988. The FCC approved the plan last summer. It works just like 911 â if you are having a mental health crisis, you will dial 988. But before that can be implemented, dozens of area codes around the nation have to move to 10-digit dialing. (Note: This crisis line number is not in effect yet. For now, dial 1-800-273-8255 to reach the National Suicide Prevention and Mental Health Crisis Lifeline.)