Where Is Area Code 423?
Area code 423 serves eastern Tennessee, with Chattanooga as its primary city. The code has two noncontiguous sections: one in southeastern Tennessee around Chattanooga and another in northeastern Tennessee around Bristol, Johnson City, and Kingsport.
The service area reaches communities in Hamilton, Bradley, McMinn, Marion, Meigs, Polk, Rhea, Sullivan, Carter, Greene, Hamblen, Hawkins, Johnson, Monroe, Unicoi, and Washington counties. The Tennessee River runs through Chattanooga, while Lookout Mountain and parts of Cherokee National Forest are notable geographic features in the wider area.
Cities and Communities in the 423 Area Code
- Athens, McMinn County
- Benton, Polk County
- Blountville, Sullivan County
- Bluff City, Sullivan County
- Bristol, Sullivan County
- Charleston, Bradley County
- Chattanooga, Hamilton County
- Church Hill, Hawkins County
- Cleveland, Bradley County
- Collegedale, Hamilton County
- Dayton, Rhea County
- Decatur, Meigs County
- Dunlap, Sequatchie County
- East Ridge, Hamilton County
- Elizabethton, Carter County
- Erwin, Unicoi County
- Etowah, McMinn County
- Greeneville, Greene County
- Jasper, Marion County
- Johnson City, Washington County
- Jonesborough, Washington County
- Kingsport, Sullivan County
- Madisonville, Monroe County
- Morristown, Hamblen County
- Mountain City, Johnson County
- Newport, Cocke County
- Pikeville, Bledsoe County
- Red Bank, Hamilton County
- Rogersville, Hawkins County
- Signal Mountain, Hamilton County
- Soddy-Daisy, Hamilton County
- South Pittsburg, Marion County
- Spring City, Rhea County
- Sweetwater, Monroe County
- Tellico Plains, Monroe County
- Unicoi, Unicoi County
History of Area Code 423
Area code 423 was established in 1995 after splitting from area code 615. The new code covered a broad part of eastern Tennessee as the state divided its original numbering areas.
Area code 865 split from 423 in 1999 to serve Knoxville and nearby communities. That change left 423 in two noncontiguous sections, one around Chattanooga and another in northeastern Tennessee. Area code 423 remains a geographic code without an overlay.
Key Facts About Area Code 423
- Area code 423 is a geographic area code in Tennessee, with Chattanooga as its primary city.
- Area code 423 serves eastern Tennessee in the Deep South region of the United States.
- Area code 423 observes Eastern Time throughout its service area.
- Area code 423 was created in 1995 through a split from area code 615.
- Area code 865 was created from part of area code 423 in 1999.
- Area code 423 has two noncontiguous sections, including the Chattanooga area and the Tri-Cities area.
- The University of Tennessee at Chattanooga is located in Chattanooga within the 423 area.
- East Tennessee State University is located in Johnson City within the 423 area.
Frequently Asked Questions
What state is area code 423 in?
Area code 423 is in Tennessee.
What major cities use area code 423?
Major cities using area code 423 include Chattanooga, Cleveland, Johnson City, Kingsport, Bristol, Greeneville, Morristown, Athens, and Elizabethton.
What time zone is area code 423 in?
Area code 423 observes Eastern Time, including Eastern Standard Time and Eastern Daylight Time.
Is area code 423 a toll-free number?
No, area code 423 is a geographic area code rather than a toll-free code.