─────── § 04. NPA RECORD · 947 · FOLIO 0749 OF 0801 ──────────────
947
United States NPA Record
Area code 947 is an overlay for area code 248 in Oakland County, Michigan.
Area code 947 is an overlay for area code 248 in Oakland County, Michigan. It was assigned in 2000 to provide relief for central office code exhaustion and implemented as an all-services overlay in 2001.
IN SERVICEFirst record · 2000
§ 04.05Event Summary
relief planned · 3mandatory dialing · 1permissive dialing · 1
§ 04.06
Documentary Record · 10 events
CHRONOLOGICAL ORDER
2000-01-01
NPA 947 assigned as overlay for 248
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2000-01-01
relief planned
NPA 947 assigned as overlay for 248
Area code 947 was assigned in 2000 as an overlay area code to provide relief for central office code exhaustion in the 248 numbering plan area.
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2000-02-01
NPA 947 overlay on 248 announced
NPA 947 to Overlay NPA 248 / NPA 679 to Overlay NPA 313 / NPA 278 to Overlay NPA 734 (Michigan)
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2000-02-01
relief planned
Assignment of NPA 947 as overlay for 248
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2001-01-01
relief planned
All-services overlay plan for 947 approved
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2001-01-01
NPA 947 overlay implemented on 248
Area code 947 was implemented as an all-services overlay in the 248 numbering plan area in 2001, allowing both codes to serve the same geographic region.
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2001-06-07
NPA 947 overlay activated for 248
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2002-01-26
permissive dialing
Permissive ten-digit dialing period begins for 248/947
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2002-01-26
NPA 947 overlays 248
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2002-03-29
mandatory dialing
Mandatory Dialing Postponed - 248/947 NPA Overlay (Michigan)
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