An apartment for rent in Chattanooga or Cleveland draws calls from many strangers.
List it with a 423 number, take the calls on your own phone and burn the number once the lease is signed.
Local 423 numbers
Get a 423 phone number for Chattanooga, Johnson City and Kingsport.
Ask for 423 when you create a number on ExpressNumber, and the number you hand out reads as Chattanooga, Johnson City, Kingsport and the towns around them. It rings the phone you already carry, and you burn it in one tap.
$0 todayLive in about a minute
This is how you get a 423 number.
- Start your 7 days free and open Create a number.
- Type 423 as the area code and give the number a name.
- Hand it out. Calls ring the phone you already carry, and texts land in your inbox.
- Burn it in one tap when you are done. Calls and texts to it stop at once.
9:41
Your numbers
Apartment for rent
(423) 555-0132
Forwarding
Used boat
(423) 555-0166
Texts only
Roofing quote
(423) 555-0108
Blocked
People ask for 423 when the search is in Chattanooga, Johnson City or Kingsport.
A used truck or a boat for sale near Johnson City brings texts from buyers all week.
Post a 423 number with the photos, set it to Texts only and keep your own number off the ad.
A moving job or a roofing quote in Kingsport ends in follow-up calls.
Give each company its own 423 number. Block the ones you did not choose.
This is where a 423 number is from.
Area code 423 is made of two separate areas in Eastern Tennessee, with the 865 area between them. Cities in it include Chattanooga, Bristol, Johnson City and Kingsport, as the numbering administrator puts it. The 729 code is laid over the same area.
Knoxville is in 865, and Nashville uses 615 and 629.
Chattanooga, Johnson City and Kingsport, TN
Area code 423 and the codes around it, oldest first.
1954
615
Split from
1995
423
This code
1999
865
Split off
2025
729
Shares the area
- Chattanooga
- Johnson City
- Kingsport
- Bristol
- Cleveland
- Morristown
- Greeneville
- Athens
- Elizabethton
- Newport
- Dayton
- Erwin
These are the facts about area code 423.
From the public records of the body that runs US phone numbering, read October 21, 2026.
- Place
- Chattanooga, Johnson City and Kingsport, Tennessee
- In service since
- 1995
- Local calls are dialed with
- Ten digits
- Shares its area with
- 729 (2025)
- Split from
- 615 (1954)
- Codes split from it
- 865 (1999)
423 was split from 615 and entered service on September 11, 1995. On November 1, 1999 the central part took 865, which left 423 in two pieces.
The Tennessee Public Utility Commission approved a 729 overlay on May 30, 2023. Dialing all ten digits for local calls became mandatory on August 5, 2025, and 729 entered service on September 5, 2025.
Try it free for 7 days.
Then pick the plan that fits how many numbers you hand out.
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- 100 forwarded minutes a month
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- Extra numbers $1 a month each
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- 100 numbers
- 1,000 forwarded minutes a month
- A number per vendor, client or listing
- Extra numbers 50¢ a month each
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People ask these questions about getting a 423 number.
More in the full FAQ.
Create a number in your dashboard, type 423 as the area code and give it a name, such as Apartment for rent. It is live in about a minute. You do not need to live in Tennessee: calls ring the phone you already carry.
Yes, for taking calls and texts. A roofer, a tutor or a mover in Chattanooga can put a 423 number on the flyer and the website, take the calls on their own phone and burn the number when the job is done.
Yes. The 423 area takes in Chattanooga, Johnson City, Kingsport, Bristol, Cleveland and Morristown. 729 numbers cover the same area.
No. Your numbers are receive-only: they take calls and texts, and they never make them. You answer calls on your own phone, and you cannot reply to a text from the inbox.
You get 7 days free and pay $0 today. After 7 days your plan starts: $9.99 a month for Basic or $29.99 a month for Pro. Cancel before then and you pay nothing.
More area codes
Every fact on this page comes from public numbering records.
The state, the dates and the related codes are rows of the North American Numbering Plan Administrator's area code database. The places are from its planning letters and the state’s own pages. Read October 21, 2026.
Put 423 on a number you can burn.
Hand out a number you can burn. Keep the one your family calls.
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