─────── § 04. NPA RECORD · 729 · FOLIO 0531 OF 0801 ──────────────
729
United States NPA Record
Overlay area code for the 423 numbering plan area in Tennessee, introduced in 2025 to provide additional numbering resources.
Overlay area code for the 423 numbering plan area in Tennessee, introduced in 2025 to provide additional numbering resources.
IN SERVICEFirst record · 2023
§ 04.05Event Summary
activated · 1mandatory dialing · 1permissive dialing · 1relief planned · 1
§ 04.06
Documentary Record · 8 events
CHRONOLOGICAL ORDER
2023-05-30
NPA 729 overlay approved for 423
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2023-05-30
relief planned
Overlay of 423 with 729 approved
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2023-07-24
NPA 729 overlay on 423 announced
NPA 729 to Overlay NPA 423 (Tennessee)
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2024-08-05
permissive dialing
Permissive ten-digit dialing for 423/729 overlay begins
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2024-11-06
NPA 729 overlay on 423 announced
NPA 729 to Overlay 423 (Tennessee) – supersedes PL-619
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2025-08-05
mandatory dialing
Mandatory ten-digit dialing for 423/729 overlay
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2025-09-05
activated
Area code 729 central office code activation
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2025-09-05
NPA 729 overlays 423
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