Area Code 423 — Tennessee

Q: What time zone is area code 423?

Area code 423 is in the EC zone (EC).

Active General Purpose Code Overlay United States

Area code 423 is located in Tennessee and operates on EC . The largest city served is Chattanooga .

Coverage Area

Area code 423 — Tennessee

Area Code Details

Area Code: 423
State / Province: Tennessee (TN)
Country: United States
Time Zone: EC EC
Local Time Now: —
Status: Active
Code Type: General Purpose Code
In Service Since: September 11, 1995
Assigned: November 22, 1994
Population Served: ~477,043 est.
Overlay Complex: 423/729

Cities Served

Largest City Chattanooga

Chattanooga Johnson City Kingsport Cleveland Morristown Bristol Greeneville Elizabethton Athens Dayton Newport Erwin Madisonville Rogersville Mountain City Apison Sneedville Midway (Sullivan) Charleston Butler

History & Relationships

Rate Centers & Exchanges

20 rate centers identified within area code 423

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Other Area Codes in Tennessee

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Nearby Area Codes

Frequently Asked Questions About Area Code 423

What state is area code 423?

Area code 423 is located in Tennessee, United States.

Where is area code 423 from?

Area code 423 originates from Tennessee. It operates in the EC zone.

What time zone is area code 423?

Area code 423 falls within the EC zone (EC).

What cities are in area code 423?

Area code 423 serves cities including Chattanooga, Johnson City, Kingsport, Cleveland, Morristown, Bristol, Greeneville, Elizabethton, and more.

Is a call from area code 423 a scam?

Area code 423 is a legitimate general purpose code area code serving Tennessee. Like any area code, individual numbers using 423 can be used for scam calls — always verify the specific number if you receive an unexpected or suspicious call.