Duff, Tennessee
Duff, Tennessee, in Campbell County, has ZIP code 37729 and area code 423, with 729 as an overlay.
- ZIP code
- 37729
- Area codes
- 423, 729
- County
- Campbell County
- State
- Tennessee
- Coordinates
- 36.5086, -84.0454
ZIP codes in Duff
Area codes for Duff
- 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 Duff
- Eagan7.8 km (4.8 mi)
- La Follette10.2 km (6.3 mi)
- Jellico10.5 km (6.5 mi)
- Clairfield11.3 km (7.0 mi)
- Fincastle11.7 km (7.3 mi)
- Newcomb12.6 km (7.8 mi)
- Pruden15.5 km (9.6 mi)
- Speedwell21 km (13 mi)
Local numbers in area code 423
Looking for a phone number with a Duff area code? These 423 numbers are for sale through Exclusive Digits. Portable to Verizon, AT&T, T-Mobile and all major US carriers.
- (423) 880-0678Johnson City, TN$59View & buy
- (423) 880-0876Johnson City, TN$59View & buy
- (423) 210-4567Tellico Plains, TN$69View & buy
- (423) 345-6006Surgoinsville, TNAlso spells FILM$69View & buy
- (423) 396-0777Collegedale, TN$69View & buy
- (423) 445-0777Surgoinsville, TN$69View & buy
- (423) 456-9777La Follette, TN$69View & buy
- (423) 481-8008Roan Mountain, TN$69View & buy
- (423) 540-8777Newport, TNAlso spells USPS$69View & buy
- (423) 550-9777Kingsport, TN$69View & buy
- (423) 550-9888Kingsport, TN$69View & buy
- (423) 560-4777Erwin, TN$69View & buy
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