Beginning August 25, Louisiana residents will need to dial the full 10-digit phone number — area code plus the seven-digit number — for all local calls. The change is part of a statewide transition prompted by the need for additional phone numbers as population growth and technology demands strain existing area codes.

Why the Change?

Phone number demand has surged due to population growth and new technology. To address this, the Louisiana Public Service Commission has approved a new overlay: area code 457, which will serve the same geographic area as 318.

• February 24 to August 24, 2025 — Permissive dialing period: both 7- and 10-digit dialing work.

• Starting August 25, 2025 — 10-digit dialing becomes mandatory within the 318 region. Calls dialed with only seven digits will not connect.

• Beginning September 25, 2025 — New phone numbers in the region may use the 457 area code, and dialing will remain 10-digit for both 318 and 457 numbers.

While the change may take some getting used to, phone companies say the new system will ensure calls are routed properly and help prevent future disruptions as more numbers are assigned.

Quick tips to prepare for 10-digit dialing:

• Update saved contacts in your phone to include the area code.

• Reprogram speed dials, alarm systems, medical alert devices, and fax machines.

• Check any business materials (signs, stationery, websites) to ensure phone numbers are shown with the area code.

• Start practicing now so the transition feels natural by August 25.

As Louisiana joins the growing list of states using 10-digit dialing, officials encourage residents to view the change as a necessary step toward keeping the phone network running smoothly in a world where mobile devices, new technologies, and expanded services are creating a constant demand for more numbers.