It was only a matter of time before 313 ran out...

"Metro Detroit is likely to run out of 313 phone numbers to assign in 2025.State regulators on Thursday set a public hearing for March 9 to take comment on a proposal to add the 679 area code for new phone customers in the 313 area code.

"The 313 area code is synonymous with Detroit and also encompasses Hamtramck, Highland Park, Allen Park, Dearborn, Dearborn Heights, Ecorse, the Grosse Pointes, Inkster, Lincoln Park, Redford Township, River Rouge and Taylor.

"Existing 313 customers would not be affected. The 313 area code is projected to be used up in the third quarter of 2025, with few to no new numbers available aside from those returned and reassigned through standard industry practice.

"The North American Numbering Plan Administrator, which administers phone number plans, in November filed a petition with the Michigan Public Service Service to implement the 679 overlay. The state agency has authority to approve or reject area code changes in Michigan."
https://www.crainsdetroit.com/techno...-phone-numbers