🇺🇸 United States · Tennessee

Area code 423

Area code 423 is a telephone area code in Tennessee, United States, covering Chattanooga, Johnson City, Kingsport, Cleveland, Morristown, Bristol and more. Local time is UTC−6 (UTC−5 in summer). Numbers look like (423) 234-5678, or +1 423 234 5678 from abroad.

State: Tennessee
Time zone: Chicago UTC−6 (UTC−5 in summer)
Local time now: –
Dial from abroad: +1 423

Places in area code 423

Cities and towns with telephone exchanges in the 423 area code, most exchanges first.

Chattanooga
Johnson City
Kingsport
Cleveland
Morristown
Bristol
Greeneville
Elizabethton
Newport
Athens
Hixson
Ooltewah
Rogersville
Blountville
Oneida
Soddy-Daisy
La Follette
Dayton
Jonesborough
Bulls Gap
Tellico Plains
Etowah
Decatur
Sweetwater

How to dial area code 423

Calling from	You dial
Inside the 423 area	423 234 5678 (10 digits)
Elsewhere in the US & Canada	1 423 234 5678
Any mobile phone, anywhere	+1 423 234 5678
UK, Europe, India and most countries	00 1 423 234 5678
Australia	0011 1 423 234 5678

Other area codes in Tennessee

615 Nashville, Murfreesboro 629 Tennessee 731 Jackson, Dyersburg 865 Knoxville, Maryville 901 Memphis, Collierville 931 Clarksville, Cookeville

Area code 423: FAQ

Where is area code 423?

Area code 423 is in Tennessee, United States and serves Chattanooga, Johnson City, Kingsport, Cleveland, Morristown, Bristol. and other places

What time zone is area code 423 in?

Area code 423 is in the America/Chicago time zone (UTC−6 (UTC−5 in summer)).

How do I call a 423 number from outside the US and Canada?

Dial your exit code (00 in most countries, or + on a mobile), then 1, then 423 and the seven-digit number. Example: +1 423 234 5678.

Is a call from area code 423 a scam?

Area code 423 is a regular North American area code, but caller ID can be spoofed: scammers often show local-looking numbers. Do not call back unknown numbers that ask for money or personal data, and check the number with the phone number validator to see whether it is valid and whether it is a mobile, landline or VoIP number.

Phone number API

Check 423 numbers in your app

numlookupapi checks any phone number worldwide in one request and returns validity, line type, carrier, location and every standard format as JSON.

Read the documentation

100 free requests every month. No credit card required.

GET https://api.numlookupapi.com/v1/validate/+14232345678

{
  "valid": true,
  "number": "12069220880",
  "local_format": "2069220880",
  "international_format": "+12069220880",
  "country_prefix": "+1",
  "country_code": "US",
  "country_name": "United States of America",
  "location": "Seattle",
  "line_type": "landline",
  "e164_format": "+12069220880",
  "national_format": "(206) 922-0880"
}