Sullivan County, Tennessee

Sullivan County, Tennessee, has 13 towns and 13 ZIP codes, in area code 423, with 729 as an overlay.

Towns in Sullivan County, A to Z

Town	ZIP codes	Area codes
Bloomingdale	nearest37665	423, 729
Blountville	37617	423, 729
Bluff	nearest37618, 37686	423, 729
Bluff City	37618	423, 729
Bristol	37620, 37621, 37625	423, 729
Colonial Heights	nearest37663, 37664	423, 729
Gray	nearest37615, 37663	423, 729
Kingsport	37660, 37662, 37663, 37664, 37665, 37669	423, 729
Orebank	nearest37664	423, 729
Piney Flats	37686, 37699	423, 729
Spurgeon	nearest37615, 37663	423, 729
Sullivan Gardens	nearest37660, 37664	423, 729
Walnut Hill	nearest37617	423, 729

ZIP codes in Sullivan County

37617Blountville423, 729
37618Bluff City423, 729
37620Bristol423, 729
37621Bristol423, 729
37625Bristol423, 729
37660Kingsport423, 729
37662Kingsport423, 729
37663Kingsport423, 729
37664Kingsport423, 729
37665Kingsport423, 729
37669Kingsport423, 729
37686Piney Flats423, 729
37699Piney Flats423, 729

Area codes in Sullivan County

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.

Local numbers in area code 423

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