Area Code 729

729 is East Tennessee's new area code

729 is a new all-services overlay of 423 in East Tennessee, covering the Chattanooga area and the Tri-Cities of Bristol, Johnson City and Kingsport, with 729 numbers assignable from September 5, 2025. It was approved by the Tennessee Public Utility Commission (NANPA Planning Letter PL-629) to relieve 423's number exhaustion. The rollout brought a dialing change: the 423 region switched from 7-digit to mandatory 10-digit dialing on February 5, 2025. Existing 423 numbers keep working; only new lines may receive a 729 number.

Because 729 is new and unfamiliar, some people are wary when it appears on caller ID and search for “who called me from 729?” An area code only shows where a number is registered, and any number can be spoofed — so a 729 call is not suspicious on its own. Judge each call by what it asks for, not the code. Is a call from 729 a scam?

Frequently asked questions

Where is area code 729?

Area code 729 covers Johnson City and nearby cities including Kingsport, Bristol, East Chattanooga in Tennessee, in the Eastern & Central Time.

What cities use area code 729?

Area code 729 serves Johnson City, Kingsport, Bristol, East Chattanooga, East Ridge, and 2 other communities in Tennessee.

What time zone is area code 729 in?

Area code 729 is in the Eastern & Central Time (America/Chicago).

How do you dial a 729 number?

Dial all 10 digits: 729 followed by the 7-digit local number. From abroad, dial +1 729 and the local number.

Is a call from area code 729 a scam?

A 729 number is geographically tied to Tennessee, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.

Is 729 a country code?

No. 729 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1, shared across the North American Numbering Plan. So a full 729 number written for international dialing looks like +1 729 followed by the 7-digit local number.