729 area code
Area code 729 is in Tennessee. It covers the same places as 423: Chattanooga, Johnson City, Kingsport and 60 other places, 172 ZIP codes in Hamilton, Sullivan, Washington and 22 other counties. It spans two time zones: local time there is Eastern or Central. In service since 2025 as an overlay: it covers the same area as 423, so a number from there can have either code.
Who calls from a 729 number
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 729
729 has no prefixes in use yet. It overlays 423, so it covers the same 63 places, largest first.
ZIP codes in area code 729
172 ZIP codes in 126 towns, by the town each is mailed to, largest first. They are 423's, which 729 overlays. Each links to its own page.
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
- Hamilton County (32)
- Sullivan County (13)
- Washington County (11)
- Bradley County (7)
- Greene County (8)
- Hamblen County (7)
- Hawkins County (6)
- McMinn County (7)
- Marion County (7)
- Monroe County (5)
- Carter County (6)
- Cocke County (6)
- Rhea County (4)
- Claiborne County (10)
- Campbell County (5)
- Scott County (6)
- Johnson County (5)
- Polk County (10)
- Unicoi County (3)
- Morgan County (7)
- Bledsoe County (2)
- Sequatchie County (1)
- Meigs County (1)
- Hancock County (2)
- Grundy County (1)
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 729
Where is area code 729?
Area code 729 is in Tennessee. It covers the same places as 423: Chattanooga, Johnson City, Kingsport and 60 other places, 172 ZIP codes in Hamilton, Sullivan, Washington and 22 other counties.
What ZIP codes are in area code 729?
172 ZIP codes, by the town each is mailed to: Chattanooga (20, 37401 to 37450), Johnson City (6, 37601 to 37615), Kingsport (6, 37660 to 37669), Cleveland (5, 37311 to 37364) and 122 more towns. The full list is on this page.
What time zone is area code 729 in?
Eastern and Central time.
What area codes overlay 729?
423. They cover the same area as 729, so a new number there can be given any of them.
Does a 729 number mean the caller is in Tennessee?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 729 call can come from anywhere.
Other area codes in Tennessee
All 8 Tennessee area codes, by area, with the cities each covers
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 729.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/729
Underlying data is public domain or openly licensed — sources, vintages and licences.