Question 1

Where is area code 423?

Accepted Answer

Area code 423 covers Knoxville and nearby cities including Johnson City, Kingsport, Bristol in Tennessee, in the Eastern Time.

Question 2

What cities use area code 423?

Accepted Answer

Area code 423 serves Knoxville, Johnson City, Kingsport, Bristol, East Chattanooga, and 3 other communities in Tennessee.

Question 3

What time zone is area code 423 in?

Accepted Answer

Area code 423 is in the Eastern Time (America/New_York).

Question 4

How do you dial a 423 number?

Accepted Answer

Dial all 10 digits: 423 followed by the 7-digit local number. From outside the United States, dial +1 423 and the local number.

Question 5

Is a call from area code 423 a scam?

Accepted Answer

A 423 number is geographically tied to Tennessee, but caller ID can be spoofed, so the displayed area code does not prove where a caller really is. If you did not expect the call, do not share personal information and consider looking the number up.

Question 6

Is 423 a country code?

Accepted Answer

No. 423 is a US area code (a domestic 3-digit code), not a country code. The country (calling) code for the United States is +1. So a full 423 number written for international dialing looks like +1 423 followed by the 7-digit local number.

Area Code 423

Cities in area code 423

Area codes by city

Other Tennessee area codes

Nearby area codes