US Area Code
423
Eastern Tennessee · Tennessee
Area code 423 serves Chattanooga, Kingsport, Johnson City and surrounding areas in Tennessee. Look up any 423 number below to check for spam, see caller ID, carrier, and line type.
Area Code Details
- State / Territory
- Tennessee
- Region
- Eastern Tennessee
- Major Cities
- Chattanooga, Kingsport, Johnson City
- Timezone
- Eastern Time
- Country
- United States
- Format
- +1 (423) XXX-XXXX