Area codes in Chattanooga, Tennessee

Chattanooga, Tennessee uses area code 423. The main Chattanooga area code is 423.

Area codes serving Chattanooga

Phone numbers in Chattanooga are written as ten digits — for example (423) 555-0190 — and fall in the Eastern Time zone.

All Tennessee area codes · Is a Chattanooga call a scam?

Nearby cities

More cities in Tennessee

Frequently asked questions

What is the area code for Chattanooga?

The main area code for Chattanooga, Tennessee is 423.

How many area codes does Chattanooga have?

Chattanooga has 1 area code: 423.

How do you dial a Chattanooga number?

Dial all 10 digits — the area code (423) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.

Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.