Zip Area Code

Colonial Heights, Tennessee

No ZIP code carries the name of Colonial Heights, Tennessee, in Sullivan County; the nearest ZIP codes are 37663 and 37664, in area code 423, with 729 as an overlay.

Nearest ZIP
37663, 37664
Area codes
423, 729
Coordinates
36.4945, -82.4906

Nearest ZIP codes to Colonial Heights

These are the ZIP codes nearest to Colonial Heights, each listed with the post office it is named after.

ZIP codePost officeCountyArea codes
37663KingsportSullivan County423, 729
37664KingsportSullivan County423, 729

Area codes for Colonial Heights

  • 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 Colonial Heights