729 area code
Chattanooga area, Eastern and Central Time.Area code 729 covers Chattanooga, Johnson City, Bristol and 72 more places in Tennessee, on Eastern and Central Time. 423 covers the same area.
Right now in Tennessee
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer) · Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
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Where 729 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 729 covers 75, but it's new and has barely been issued yet, so these are ranked by the numbers its overlay already holds. Its biggest metro area is Chattanooga, TN-GA.
Chattanooga, Johnson City, Bristol, Cleveland, Kingsport, Morristown, Athens, Greeneville, La Follette, Newport, Elizabethton, Midway (Sullivan) + 63 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 729 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 729 number to them, since you can't tell a work line from a personal cell.
What applies to 729Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
729 and 423
729 went into service on September 5, 2025. 729 and 423 cover the same area, so new numbers can get either code and neighbors can have different area codes. 729 holds 0% of the area's exchanges; 423 holds the most. Local calls take all 10 digits.
- 1995423 overlay
- 2025729 starts
Source: NANPA area code database
Calling a list of 729 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
729 area code FAQ
What area code is 729?
729 is a Tennessee area code for Chattanooga, Johnson City, Bristol, Cleveland and 71 more places.
What time zone is the 729 area code in?
It spans two: Eastern Time (EST, UTC-5; EDT, UTC-4 in summer) and Central Time (CST, UTC-6; CDT, UTC-5 in summer). A 729 number can be on either clock.
Is 423 the same as 729?
Same area, different code. 729 and 423 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 729 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 729 area code start?
On September 5, 2025.
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