Pick 423 if the number should read as Chattanooga.
The numbering administrator names Chattanooga, Bristol, Johnson City and Kingsport among its cities.
The area codes for Chattanooga are 423 and 729.
Area codes in Chattanooga
Get a phone number with the right area code for Chattanooga.
Chattanooga is in 423, split from 615 in 1995, and in 729, laid over it in 2025. 423 is made of two separate areas in Eastern Tennessee.
$0 todayLive in about a minute
Chattanooga has two area codes.
Pick 423 for Chattanooga, the code the city took in 1995.
Pick 423 to reach Cleveland and Dayton too.
Athens, Morristown and Greeneville are in the same code.
Pick 865 if the number is for Knoxville.
On November 1, 1999 the central part took 865, which left 423 in two pieces.
People filed 178 FCC complaints about unwanted calls from Chattanooga area codes in 12 months.
From October 2025 to September 2026, 178 unwanted-call complaints filed with the FCC gave a caller ID number that started with 423.
- 178unwanted-call complaints named a Chattanooga code
Chattanooga codes
How many complaints named a caller ID that starts with each Chattanooga code.
- 1423Chattanooga, Johnson City and Kingsport178
Source: Federal Communications Commission, CGB - Consumer Complaints Data (dataset 3xyp-aqkj), issue "Unwanted Calls", read on November 4, 2026. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
This is how you get a Chattanooga number.
- 1
Start your free week.
Every plan begins with 7 days free, and you pay $0 today.
- 2
Type the code you picked.
Open Create a number, type the three digits and give the number a name.
- 3
Hand the number out.
Calls ring the phone you already have, and texts land in your ExpressNumber inbox.
People ask these questions about Chattanooga area codes.
More in the full FAQ.
When 865 was cut out of the middle in 1999, Chattanooga stayed in one piece of 423 and Johnson City in the other.
The Tennessee Public Utility Commission approved an overlay on May 30, 2023. Ten digits became mandatory on August 5, 2025, and 729 followed.
A local call in Chattanooga is dialed with ten digits, whichever of its codes the number starts with. The area code is part of every number you give out.
From October 2025 to September 2026, people filed 178 FCC complaints about unwanted calls from numbers that start with a Chattanooga code: 423 (178). A complaint is one person's report. Caller ID can be faked, so a code shows what appeared on the phone, not where the caller was.
Yes. You type the area code you want when you create a number, and you do not need to live in Chattanooga. Calls ring the phone you already have, and texts land in your ExpressNumber inbox.
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.
Codes around Chattanooga
More cities
Every fact on this page comes from public numbering records.
The codes, the places and the years are rows of the North American Numbering Plan Administrator's area code database, and the complaints are the FCC's own.
Put a Chattanooga code on a number you can burn.
Calls ring the phone you already have, and texts land in your ExpressNumber inbox.
Try it free for 7 days