ZIP Code 37686

37686 is one of Tennessee's ZIP codes, delivering to addresses in Piney Flats, Sullivan County.

City: Piney Flats
County: Sullivan County
State: Tennessee
Prefix: 376xx

Where this code sits

37686 is part of the 376xx range, the group of codes handled by one mail processing centre. Piney Flats is served by 2 ZIP codes in total.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 37686 delivers to without sharing its boundary.

ZIP codes nearest 37686

The ZIP codes whose reference points sit closest to 37686.
ZIP code	Distance	Delivers to
ZIP code 37699	2.5 mi	Piney Flats, TN
ZIP code 37621	5.6 mi	Bristol, TN
ZIP code 37618	5.8 mi	Bluff City, TN
ZIP code 37694	6.4 mi	Watauga, TN
ZIP code 37617	6.4 mi	Blountville, TN
ZIP code 37615	7.3 mi	Johnson City, TN
ZIP code 37601	7.8 mi	Johnson City, TN
ZIP code 37663	8.5 mi	Kingsport, TN

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 37686, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 37686. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.