─────── § 04. NPA RECORD · 872 · FOLIO 0674 OF 0801 ──────────────
872
United States NPA Record
Overlay area code for Chicago, Illinois, introduced in 2009 to relieve numbering exhaustion in the 312 and 773 areas.
Overlay area code for Chicago, Illinois, introduced in 2009 to relieve numbering exhaustion in the 312 and 773 areas.
IN SERVICEFirst record · 2007
§ 04.05Event Summary
mandatory dialing · 1relief planned · 1
§ 04.06
Documentary Record · 5 events
CHRONOLOGICAL ORDER
2007-08-10
relief planned
Overlay planned for 312 and 773 with 872
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2009-06-15
NPA 872 overlay on 312 announced
NPA 872 to Overlay NPA 312 and 773 (Illinois)
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2009-08-10
NPA 872 overlay on 312 announced
NPA 872 to Overlay NPA 312 and 773 (Illinois)
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2009-11-07
NPA 872 overlay activated for 312 and 773
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2009-11-07
mandatory dialing
Mandatory 11-digit dialing for 312, 773, and 872
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