The 423 area code began in 1995 to serve East Tennessee, home to Chattanooga, Kingsport, Johnson City. It operates on Eastern (ET) with about 800K+ residents.
MeraTalk turns a 423 number into your local line for Tennessee, ready to use on your phone or computer.
Here's why a 423 number belongs in Tennessee: it makes your business local, credible, and easy to reach.
Outbound reps dial East Tennessee prospects from a number those prospects recognize. A familiar 423 caller ID gets the conversation started instead of going to voicemail.
Give your East Tennessee customers a local number to call for help. Calls route to your support team wherever they sit, with queues, schedules, and an AI receptionist after hours.
Your team doesn't need to live in Tennessee to answer a 423 number. Calls ring on laptops and mobiles anywhere, while customers see a hometown business.
Pair your 423 number with local numbers in other markets you serve. Each location keeps its own identity while every call lands in one shared MeraTalk workspace.
Area codes are added as a region's demand for phone numbers grows. Here's when each Tennessee code came online — and where 423 fits in.
615 was the first of Tennessee's current codes, assigned to Nashville Metro and anchored by Nashville. It remains the code most residents associate with Nashville and Murfreesboro.
As Memphis grew, 901 was introduced to keep up with demand for new numbers around Memphis and Bartlett. Existing numbers kept their codes — 901 simply opened fresh inventory for the area.
As East Tennessee grew, 423 was introduced to keep up with demand for new numbers around Chattanooga and Kingsport. Existing numbers kept their codes — 423 simply opened fresh inventory for the area.
As East Tennessee grew, 865 was introduced to keep up with demand for new numbers around Knoxville and Maryville. Existing numbers kept their codes — 865 simply opened fresh inventory for the area.
As Middle Tennessee grew, 931 was introduced to keep up with demand for new numbers around Clarksville and Columbia. Existing numbers kept their codes — 931 simply opened fresh inventory for the area.
As West Tennessee grew, 731 was introduced to keep up with demand for new numbers around Jackson and Dyersburg. Existing numbers kept their codes — 731 simply opened fresh inventory for the area.
As Nashville Metro (overlay) grew, 629 was introduced to keep up with demand for new numbers around Nashville and Hendersonville. Existing numbers kept their codes — 629 simply opened fresh inventory for the area.
Make and receive calls and texts from your 423 number on desktop, mobile, or desk phone. One number for everything — no app-switching, no confusion.
Answers, screens, and routes every call to your 423 number around the clock — even when your team is offline or busy.
Every call and text to your 423 number is visible to the whole team — anyone can pick up, reply, or follow up.
Missed calls become readable transcripts delivered to your inbox.
Route East Tennessee callers to the right person on your schedule.
Already have a 423 number? Bring it — porting is on every plan.
7 area codes covering Tennessee
Area code 423 is part of the North American Numbering Plan (NANP) — the system that assigns three-digit codes to geographic regions across the US, Canada, and parts of the Caribbean. Code 423 was assigned to East Tennessee and serves Chattanooga and Kingsport as its primary markets.
When a call is made to a 423 number, the carrier routes it through the Eastern (ET) time zone switching network. This also means that when customers see a 423 number on their caller ID, they immediately associate it with East Tennessee — before the call is even answered.
The area code on your caller ID shapes how customers in East Tennessee decide whether to pick up or ignore your call.
Calls from a local 423 number are far more likely to be answered than calls from an out-of-state or toll-free number. Customers in East Tennessee recognise the code and trust it as local.
A 423 number tells prospects in Tennessee that you operate in their market — even if your team is fully remote or based elsewhere. First impressions happen before the first word.
With a cloud-hosted 423 number, your team can answer calls from any device, in any location. The local area code stays consistent while your team stays flexible.
South listed first
Explore other South area codes and find the right local number for every market you serve.
Set up your 423 number on MeraTalk, compare other US area codes, or read the public record for East Tennessee.
Read the in-depth guide to the 423 area code — coverage, history, cities, time zone and how to get a number.
On MeraTalkRun your 423 number on a full business phone system — calls, SMS, routing and an AI receptionist included.
On MeraTalkBrowse every US area code by state and find the right local number for the markets you serve.
External referenceSee the FCC's area code relief regulation (47 CFR §52.19) governing how area code 423 and every US area code is administered.
Sample placeholders — replace with verified customer outcomes after sales approval.
Same product, same support, same compliance on every plan. The AI receptionist is included from day one.
