─────── § 04. NPA RECORD · 309 · FOLIO 0111 OF 0801 ──────────────
309
United States NPA Record
Area code for west-central Illinois, including cities such as Bloomington, Peoria, and Moline.
Area code for west-central Illinois, including cities such as Bloomington, Peoria, and Moline. Created in 1957 as a split from area code 815.
IN SERVICEFirst record · 1956
§ 04.05Event Summary
split · 2boundary change · 1mandatory dialing · 1permissive dialing · 1relief planned · 1
§ 04.06
Documentary Record · 8 events
CHRONOLOGICAL ORDER
1956-09-01
split
NPA 309 created from split of 815 and part of 217
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1956-09-01
boundary change
Northern portion of 217 combined with part of 815 to form 309
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1957-01-01
split
NPA 309 split from 815
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2021-04-24
permissive dialing
Permissive 10-digit dialing begins in 309
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2021-10-24
mandatory dialing
Mandatory ten-digit dialing in NPA 309
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2021-11-29
relief planned
Overlay relief announced for 309 with 861
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2022-01-10
NPA 861 overlay on 309 announced
NPA 861 to Overlay NPA 309 (Illinois)
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2023-02-24
NPA 861 overlays 309
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