─────── § 04. NPA RECORD · 679 · FOLIO 0481 OF 0801 ──────────────
679
United States NPA Record
Overlay area code introduced in 2025 to relieve numbering exhaustion in the 313 area code serving Detroit, Michigan.
Overlay area code introduced in 2025 to relieve numbering exhaustion in the 313 area code serving Detroit, Michigan.
IN SERVICEFirst record · 2000
§ 04.05Event Summary
relief planned · 3relief canceled · 2mandatory dialing · 1permissive dialing · 1reserved · 1
§ 04.06
Documentary Record · 10 events
CHRONOLOGICAL ORDER
2000-02-01
reserved
NPA 679 reserved for future relief
▸
2000-02-01
relief planned
NPA 679 reserved for overlay relief of 313
Area code 679 was reserved in February 2000 as a future overlay code for the 313 numbering plan area to provide relief due to number exhaustion concerns.
▸
2000-04-01
relief canceled
Relief schedule for 679 canceled
▸
2000-04-24
relief canceled
Overlay relief with 679 suspended
Implementation of the 679 overlay relief plan was suspended in April 2000, delaying the introduction of the new area code for the 313 area.
▸
2023-05-18
relief planned
313/679 overlay approved
▸
2023-07-13
NPA 679 overlay on 313 announced
NPA 679 to Overlay NPA 313 (Michigan)
▸
2025-03-17
relief planned
Overlay complex with 679 announced
▸
2025-04-07
permissive dialing
Permissive ten-digit dialing begins for 313/679 overlay
▸
2025-10-07
mandatory dialing
Mandatory 10-digit dialing for 313/679 overlay
▸
2025-11-07
NPA 679 overlay in-service for Detroit
▸