Area Code 423 at a Glance
| Area code | 423 |
| Region | Tennessee |
| Country | United States |
| Primary timezone | America/Chicago |
| Dialing format | +1 (423) NXX-XXXX |
Cities and Places Using Area Code 423
Based on prefix-level carrier data, area code 423 covers places including:
- Chattanooga, TN
- Johnson City, TN
- Kingsport, TN
- Cleveland, TN
- Morristown, TN
- Bristol, TN
- Greeneville, TN
- Newport, TN
- Elizabethton, TN
- Hixson, TN
- Athens, TN
- Blountville, TN
Frequently Asked Questions
Where is area code 423?
Area code 423 serves Tennessee, United States.
Who is calling me from area code 423?
A call from area code 423 most likely originates from Tennessee, but caller ID can be spoofed. If an unknown caller asks for personal or payment information, hang up and call the organization back on its official number.
How do I dial a 423 number?
Within North America: dial 1-423 followed by the 7-digit number. From abroad: your international prefix (like 00 or +), then 1 423 and the number.