Why the Change Is Happening
Starting this week, residents in Detroit and across the 313 area code must use 10-digit dialing—meaning callers now have to include the area code when making local calls. The shift comes as telecommunications providers prepare to introduce a new 679 area code overlay, which will serve the same geographic region as 313. According to the Michigan Public Service Commission, the move is necessary because the 313 area code is running out of available phone numbers. The addition of the 679 overlay ensures that Metro Detroit will continue to have enough new numbers to meet demand for mobile phones, business lines, and internet-based services.
What Residents Need to Know
Callers who only dial seven digits will now hear a recorded message instructing them to redial using the full 10-digit number. The change affects both landline and mobile phones, and applies to all local calls made within the 313 area code, which includes Detroit and nearby communities such as Dearborn, Lincoln Park, and Redford Township. The new 679 area code is expected to start appearing on new numbers in the coming months, though no existing 313 numbers will change. Emergency services, like 911 and 988, remain unaffected. Three-digit dialing for special services will continue to work as usual.
Preparing for the Transition
Officials recommend residents update contact lists, business materials, and any devices that automatically dial phone numbers—such as fax machines, alarm systems, and speed dials—to ensure they include the area code. The Michigan Public Service Commission and phone carriers have been running outreach campaigns to alert Metro Detroiters to the change, emphasizing that while it may take some getting used to, the transition is essential for keeping pace with the region’s telecommunications growth. “We understand it’s an adjustment,” said a commission spokesperson, “but it’s a necessary step to make sure the Detroit area can continue to grow and connect.”
Looking Ahead
The introduction of the 679 overlay marks a new chapter in Detroit’s telecommunications history. The 313 area code—an enduring symbol of the city’s identity—will continue to exist, but it will now share the stage with 679 as Metro Detroit expands into its digital future.
