─────── § 04. NPA RECORD · 815 · FOLIO 0617 OF 0801 ──────────────
815
United States NPA Record
Area code serving northern Illinois outside the Chicago metropolitan area, established in 1947.
Area code serving northern Illinois outside the Chicago metropolitan area, established in 1947.
IN SERVICEFirst record · 1947
§ 04.05Event Summary
split · 2activated · 1introduced · 1mandatory dialing · 1
§ 04.06
Documentary Record · 8 events
CHRONOLOGICAL ORDER
1947-01-01
introduced
NPA 815 introduced as original Illinois area code
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1956-09-01
split
NPA 309 created from split of 815 and part of 217
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1957-01-01
split
NPA 309 split from 815
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2006-05-15
NPA 779 overlay on 815 announced
NPA 779 to Overlay NPA 815 (Illinois)
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2007-02-17
mandatory dialing
Mandatory 10-digit dialing begins in 815 area
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2007-03-01
activated
NPA 779 activated as overlay for 815
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2007-03-17
NPA 779 activated as overlay for 815
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2009-01-01
NPA 779 officially added as overlay to 815
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