─────── § 04. NPA RECORD · 447 · FOLIO 0249 OF 0801 ──────────────
447
United States NPA Record
Overlay area code added to Illinois' central region in 2021 to expand numbering capacity, requiring ten-digit dialing for local calls.
Overlay area code added to Illinois' central region in 2021 to expand numbering capacity, requiring ten-digit dialing for local calls.
IN SERVICEFirst record · 2006
§ 04.05Event Summary
relief planned · 2mandatory dialing · 1permissive dialing · 1
§ 04.06
Documentary Record · 8 events
CHRONOLOGICAL ORDER
2006-08-16
relief planned
All-services overlay for 217 approved by Illinois Commerce Commission
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2007-03-06
relief planned
ICC approved NPA 447 as an overlay for 217
On March 6, 2007, in Docket No. 01-0656, the Illinois Commerce Commission approved the addition of area code 447 as an all-services overlay for the 217 region.
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2019-10-28
NPA 447 overlay on 217 announced
NPA 447 to Overlay NPA 217 (Illinois)
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2020-08-29
permissive dialing
Permissive ten-digit dialing period for the 217/447 overlay
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2021-01-01
Overlay of area code 447 added to Illinois' central region
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2021-02-27
mandatory dialing
Mandatory 10-digit dialing for 217/447 overlay
On February 27, 2021, ten-digit dialing became mandatory for all local calls in the 217/447 overlay region, ending the permissive dialing period.
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2021-03-27
NPA 447 overlays 217 in central Illinois
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2021-03-29
NPA 447 entered service as an overlay on 217
The first prefixes in area code 447 were introduced after March 29, 2021, placing 447 into service as an all-services overlay on area code 217.
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