423 Area code

--:-- CDT    AM/PM 24 hours
--:-- EDT

Time zone	Difference to UTC/GMT
Central Time	Standard time zone: UTC/GMT -6:00 hours Daylight saving time: +1:00 hour Current time zone offset: UTC/GMT -5:00 hours Time zone abbreviation: CDT
Eastern Time	Standard time zone: UTC/GMT -5:00 hours Daylight saving time: +1:00 hour Current time zone offset: UTC/GMT -4:00 hours Time zone abbreviation: EDT

Time zones	DST Transitions
Central Time Eastern Time	DST starts on Sunday 14 March 2021, 02:00	DST ends on Sunday 07 November 2021, 02:00

Central Time:
- CST - Central Standard Time
- CDT - Central Daylight Time when daylight saving time is being observed (from mid-March to early November)

Eastern Time:
- EST - Eastern Standard Time
- EDT - Eastern Daylight Time when daylight saving time is being observed (from mid-March to early November)

423 Area code location map

Hamilton County

• Chattanooga
• East Ridge
• Soddy-Daisy
• Red Bank
• Collegedale
• Signal Mountain
• Sale Creek
• Ooltewah

Washington County

• Johnson City
• Jonesborough
• Fall Branch
• Limestone

Sullivan County

• Kingsport
• Bristol
• Blountville
• Bluff City

Bradley County

• Cleveland
• Charleston

Hamblen County

• Morristown

Greene County

• Greeneville
• Mosheim
• Baileyton

Carter County

• Elizabethton
• Roan Mountain
• Hampton

McMinn County

• Athens
• Etowah
• Englewood
• Niota
• Riceville

Rhea County

• Dayton
• Spring City

Cocke County

• Newport

Hawkins County

• Church Hill
• Rogersville

Unicoi County

• Erwin

Monroe County

• Sweetwater
• Madisonville
• Vonore
• Tellico Plains

Sequatchie County

• Dunlap

Claiborne County

• Harrogate
• New Tazewell

Scott County

• Oneida
• Huntsville
• Robbins

Marion County

• Jasper
• South Pittsburg
• Whitwell

Johnson County

• Mountain City

Campbell County

• Jellico

Bledsoe County

• Pikeville

Meigs County

• Decatur

Hancock County

• Sneedville

Polk County

• Benton

Morgan County

• Wartburg
• Petros
• Sunbright