A local number. A little more freedom.
Get a 423
phone number.
A local number for Chattanooga, TN. Call and text over WiFi or mobile data, on the phone you already have.
- Calls and texts
- No extra SIM
- Location
- Chattanooga, Tennessee
- Time zone
- Eastern & Central
Where is area code 423 located?
Area code 423 is a Tennessee area code, serving Chattanooga, TN and nearby cities including Johnson City, Kingsport, Bristol. It is in the Eastern & Central time zone.
Who is calling from area code 423?
A 423 call comes from a number assigned to the Chattanooga, TN area, which can be a mobile, a landline or an app-based number like AvoCall's. Caller ID can be faked from any area code, so if you don't know the number, let it go to voicemail and never share a code you didn't ask for.
How do I get a 423 phone number?
Pick an available 423 number and sign up for AvoCall. Your new Chattanooga, TN number works for calls and texts on your existing phone over WiFi or data. No second SIM is needed. Right now 20 numbers in the 423 area code are available on this page (checked October 11, 2026 at 8:33 AM UTC).
Find one that feels like yours
Choose a 423 number
20 numbers listed · Checked October 11, 2026 at 8:33 AM UTC.
- (423) 633-1333Chattanooga, TN
- (423) 235-8131Chattanooga, TN
- (423) 235-8057Chattanooga, TN
- (423) 666-2565Elizabethton, TN
- (423) 666-2406Elizabethton, TN
- (423) 651-6033Jasper, TN
- (423) 810-4292Charleston, TN
- (423) 481-5075Roan Mountain, TN
- (423) 651-9136Jasper, TN
- (423) 644-0226Soddy Daisy, TN
- (423) 219-1760Charleston, TN
- (423) 672-1740Johnson City, TN
- (423) 500-6228Rogersville, TN
- (423) 500-6275Rogersville, TN
- (423) 219-0448Charleston, TN
- (423) 856-6142Athens, TN
- (423) 810-4375Charleston, TN
- (423) 500-6509Rogersville, TN
- (423) 897-4159Fall Branch, TN
- (423) 500-6021Rogersville, TN
Every number requires an AvoCall plan. Current web pricing is verified at checkout, and number availability changes often.
About the 423 area code
Since 1995, area code 423 has connected Chattanooga, Tennessee with Johnson City, Kingsport, Bristol, and Cleveland. Its territory spans two clocks, with some communities on Eastern time and others on Central.
The code was formed from area code 615. It went on to supply the ground for 865, and it now pairs with 729 as an overlay, putting its local calls at ten digits.
Dialing note: 423 is part of an overlay complex with 729, so local calls in this area are dialed with all ten digits.
Numbering details on this page (service dates and overlay status) are checked against the NANPA numbering registry. Registry data as of 10/08/2026.
423 phone number FAQ
- Can I receive verification codes on a 423 number?
- AvoCall 423 numbers support calling and messaging. Verification-text compatibility varies by sender; short-code and 2FA delivery is not guaranteed.
- Which 423 numbers are available right now?
- As of October 11, 2026 at 8:33 AM UTC, 20 423 numbers were available to claim on this page. Inventory is re-checked hourly and changes as numbers are claimed, and availability is confirmed at checkout. See the current list.