The 729 area code covers the same area as 423, including Chattanooga, Johnson City and 61 more places in Tennessee.
Area code 729 is in Tennessee, on Eastern Time and Central Time. In the 729 area, phone numbers are given out most in Hamilton County, then Sullivan and Washington counties. It has been in service since September 5, 2025. 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
- September 5, 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, the city and state on the listing, and whether it is a mobile, landline or VoIP line. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup.
729 started in 2025 as an overlay on 423, and its ground has not changed since.
2025
729 starts on September 5, 2025, 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.
The area codes closest to 729 are 865, 828 and 606.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
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 the 729 area, phone numbers are given out most in Hamilton County, then Sullivan and Washington counties.
What state is area code 729 in?
Tennessee. 729 is a Tennessee area code on Eastern Time and Central Time.
What cities use area code 729?
The places holding the most 729 prefixes are Chattanooga, Johnson City, Bristol, Cleveland, Kingsport, Morristown, Athens and Greeneville, out of 63 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
What time zone is area code 729 in?
729 is on Eastern Time and Central Time.
When did area code 729 start?
729 went into service on September 5, 2025, as an overlay on 423: new numbers for the same area.
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.
Is 729 a toll-free number?
No. 729 is a regular area code for Chattanooga and Johnson City in Tennessee, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 729?
The closest are 865 (Knoxville, Tennessee), 828 (Asheville, North Carolina), 606 (Corbin, Kentucky) and 864/821 (Greenville, South Carolina), measured between the centres of each area.
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.