Piney Flats, Tennessee

Piney Flats, Tennessee, in Sullivan County, has ZIP codes 37686 and 37699 and area code 423, with 729 as an overlay.

ZIP codes: 37686, 37699
Area codes: 423, 729
County: Sullivan County
State: Tennessee
Coordinates: 36.4328, -82.3190

ZIP codes in Piney Flats

ZIP code	Post office	County	Area codes
37686	Piney Flats	Sullivan County	423, 729
37699^*	Piney Flats	Sullivan County	423, 729

* No mapped delivery area: P.O. boxes or a single organization. Area codes are those of the nearest ZIP code area.

Area codes for Piney Flats

Area code 423
In service since September 11, 1995. Shares its area with 729. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.
Area code 729
In service since September 5, 2025. Shares its area with 423. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Towns near Piney Flats

Bluff4.7 km (2.9 mi)
Watauga8.3 km (5.2 mi)
Bluff City8.9 km (5.5 mi)
Central11.2 km (7.0 mi)
Biltmore11.3 km (7.0 mi)
Johnson11.5 km (7.1 mi)
Blountville12.2 km (7.6 mi)
Spurgeon12.8 km (8.0 mi)

Local numbers in area code 423

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