The 729 area code covers the same area as 423, including Chattanooga, Johnson City and 61 more places in Tennessee.
729 has been in service since 2025, on Eastern Time and Central Time. 423 covers the same area, so two neighbours can have different area codes.
- Where
- 8 counties in Tennessee, mostly Hamilton County, Sullivan County and Washington County
- Time zone
- Eastern Time and Central Time
- In service since
- 2025
- Shares its area with
- 423 (since 1995)
- Prefixes in use
- None assigned yet, per NANPA
- How to dial
- Local calls need all 10 digits: 729-555-0142.
Find out who called you from a 729 number.
Enter the full 10-digit number to see who it is listed to, where it is registered, and whether it is a mobile, landline or VoIP line.
729 started in 2025 as an overlay on 423, and its ground has not changed since.
2025
729 starts as an overlay on 423: new numbers on the same ground.
A 729 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
Tennessee has 7 other area codes.
These are the questions people ask most about area code 729.
Where is area code 729?
729 covers Chattanooga, Johnson City, Bristol and Cleveland and 59 more places in Tennessee, in Hamilton County, Sullivan County and Washington County.
What time zone is area code 729 in?
729 is on Eastern Time and Central Time.
Is 729 the same area as 423?
Yes. 423 (since 1995) covers the same ground as 729. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 729 number?
Local calls need all 10 digits: 729-555-0142.
Who called me from a 729 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 729 a scam?
729 is a real Tennessee area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.