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History of 423 Area Code
Area code 423 started serving Tennessee on September 11, 1995, and is the only one that serves this area. It was one of 14 area codes introduced that year.
423 is Tennessee’s third area code, which currently has seven. It was created to relieve the pressure on the 615 area code, as its numbers were insufficient to meet the demand for new numbers.
Moreover, the 615 phone area code was split in 1999, requiring some phone numbers to be updated to area code 865.
Additionally, area code 729 has been proposed as an overlay for the 423 area code, which is expected to go into service on March 5, 2025. However, future plans may change.
Search 423 Area Code Virtual Phone Numbers
Explore a wide range of Calilio’s 423 phone numbers and acquire one to create a local presence in Chattanooga, Tennessee.
Some Numbers May Require Proof Of ID And Address Registration According To Local Laws.
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Tennessee’s Area Code 423: Exploring The Region’s Business Scenario and Outlook
Chattanooga, part of Hamilton County, has the fastest internet service in the Western Hemisphere, with speeds up to 1 gigabit per second.
Furthermore, businesses expanding in Hamilton County can take advantage of incentives, including a Foreign Trade Zone (FTZ) that reduces customs duties on imported products.
The county’s unemployment rate is 3.40% (October 2024), less than the state’s average. Furthermore, the average annual household income here is $95,920, while the median is $65,680 (2022).
The industries driving Hamilton County's economy include mineral, oil, and gas extraction, public administration, retail, and health care and social services. The leading employers are Cno Financial Group Inc, Rci Llc, Navient Corp, Roche Diagnostics Corp, Openlane Inc, IU Health North Hospital, Cape, and Midcontinent Independent Syst.
Overall, Tennessee’s Hamilton County is a great place for business startups. Hence, choosing the 423 phone area code to operate or expand a firm here can be beneficial.

423 Nearby Area Codes
Location | Area Codes |
| Huntsville, Alabama | 256, 938 |
| Bowling Green, Kentucky | 270, 364 |
| Bristol, Virginia | 276 |
| Greensboro, North Carolina | 336, 743 |
| Knoxville, Tennessee | 865 |
| Ashland, Kentucky | 606 |
| Nashville, Tennessee | 615, 629 |
| Charlotte, North Carolina | 704, 980 |
| Augusta, Georgia | 706, 762 |
| Columbia, South Carolina | 803, 839 |
| Asheville, North Carolina | 828 |
| Greenville, South Carolina | 864 |
| Clarksville, Tennessee | 931 |
423 Area Code Number as a Communication Tool for Business Growth
Unified Callbox
Send messages, make calls, and communicate with each other via a single platform.
Call Recording
Record all calls for future reference in case of emergency.
Pin Messages
Highlight the key messages at the top so no one misses the important details.
Call Screening
Know who’s calling before picking up to avoid spam/fraud calls.
- Register with Calilio.
- Subscribe to a service plan.
- Choose a number.
- Complete the payment process.
- Activate the number.
Already Have a 423 Phone Number for Business?
If yes, transfer your existing 423 number to Calilio and enjoy our advanced features.

Why Does Your Business Need a 423 Area Code Number?
Acquiring 423 numbers can help firms build a local presence, boost search results, make frequent calls, and enhance local marketing.
Frequent Calls
Client Trust and Familiarity
Boosts Local Search Results
Enhances Local Marketing
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Frequently Asked Questions
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