423 Area Code

423 Area Code – Get a Local Phone Number in Chattanooga, TN

Thinking of expanding your business into Chattanooga? KrispCall gives you a local phone number with area code 423. There is no need for additional hardware; you can simply add a virtual phone number to your smartphone, tablet, or computer and start calling and texting through a simple, modern app.

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Where is area code 423?

Area code 423 is located in Tennessee which is in the Eastern and Central time zone. It is the area code for central Tennessee, north and south of Knoxville. This area code covers two separate regions, northeast and southeast. In the northeast, you’ll find cities like Bristro, Johnson City, and Kingsport whereas in the southeast you’ll find cities including Chattanooga, Cleveland, and McMinnville.

The first new area code, 423, was officially launched on September 11, 1995. It was created from a split of area code 615. In 1999, it was split to form area code 865. This prefix (423) covers 26 counties, including Bledsoe County, Bradley County, Campbell County, Carter County, Claiborne County, Cocke County, Greene County, Hamblen County, and Hamilton County, and 50 major cities, including Johnson City, Kingsport, Cleveland, Morristown, and Bristol.

The Tennessee Public Utility Commission has approved area code 729 as an all-services overlay for area code 423, with an implementation date of March 5, 2025. Area code 729 will become available to subscribers once all assignable central office codes in area code 423 have been assigned.

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