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The 313 area code in Detroit may be replaced by 679, according to the Michigan Public Service Commission. The 313 area code is expected to run out of unassigned numbers by the end of 2025. The proposed 679 area code will be discussed at a public hearing in Detroit in March. Only new phone customers will be affected, and everyone with a 313 area code will keep their phone number.

As per the MPSC, the 313 area code covers Detroit, its enclaves Hamtramck and Highland Park, and the suburbs Allen Park, Dearborn, Dearborn Heights, Ecorse, the Grosse Pointes, Inkster, Lincoln Park, Redford Township, River Rouge, and Taylor. If the new area code goes into effect, users with a 313 or 679 number will need to include area codes for local calls within and between those two area codes, which means even local calls will require at least 10 digits. In order to accommodate the additional digits, some devices like auto dialing equipment, medical devices, and home security systems will need to be reprogrammed if they are currently programmed to dial only seven digits.

As mention earlier, there is a hearing for the discussion of the new area code scheduled for March 9, 2023. The public will have an opportunity to comment on the plans. The hearing will be held in the Frank Hayden Community Room at Wayne County Community College District’s downtown campus.