─────── § 04. NPA RECORD · 573 · FOLIO 0375 OF 0801 ──────────────
573
United States NPA Record
Area code created in 1996 from a split of 314, covering most areas outside the St.
Area code created in 1996 from a split of 314, covering most areas outside the St. Louis metropolitan area in Missouri.
First record · 1996
§ 04.05Event Summary
permissive dialing · 3mandatory dialing · 2relief planned · 1reserved · 1split · 1
§ 04.06
Documentary Record · 10 events
CHRONOLOGICAL ORDER
1996-01-07
split
NPA 573 split from 314
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1996-01-07
permissive dialing
Permissive dialing period for 573 and 314
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1996-07-07
mandatory dialing
Mandatory dialing for NPA 573 after split
The permissive dialing period for area code 573 ended on July 7, 1996, requiring all calls to use the new area code for the affected region.
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1996-07-07
permissive dialing
Permissive dialing period ends for 573 split from 314
The permissive dialing period for the 573 split from 314 ended on July 7, 1996. After this date, calls had to be dialed using the correct area code.
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2022-05-01
relief planned
Overlay complex approved for 573
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2022-06-17
NPA 235 overlay on 573 announced
NPA 235 to Overlay NPA 573 (Missouri)
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2022-06-17
reserved
NPA 235 assigned for overlay
Area code 235 was assigned by the NANP Administrator on June 17, 2022, for use as the overlay code for the 573 region in Missouri.
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2023-08-26
permissive dialing
Permissive dialing for 235/573 overlay complex
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2024-02-24
mandatory dialing
Mandatory 10-digit dialing for 573/235 overlay
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2024-03-24
NPA 235 overlay activated on 573
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