(423) Area Code Business Phone Numbers
The 423 area code covers northeast Tennessee, from Johnson City and the Tri-Cities down through Chattanooga. It was carved out of 615 back in 1995 to serve a region that has been growing steadily ever since.
Get a 423 NumberAbout the 423 Area Code
When 423 was split off from 615 in 1995, it took on the eastern third of Tennessee, pulling together Johnson City, Kingsport, Bristol and Chattanooga under one code. Three decades on, that same code still blankets the mountains, the river valleys and the Tri-Cities, and locals know it on sight.
Johnson City has been quietly busy. The metro area counts more than 2,600 active businesses, and a MoneyGeek study ranked it the fastest growing community for new business starts in the country [1]. The population reached 73,337 in the most recent census estimate, with Washington County up about 5% since 2020 [2].
If your customers are in Bristol, Kingsport or anywhere between, a 423 on the caller ID looks like a neighbor instead of an unknown out-of-state call. That one small thing can be the difference between a picked-up call and a voicemail.
Cities Served by the 423 Area Code
The 423 covers northeast Tennessee and swings down to the Chattanooga area, picking up seven of the state's recognisable business towns along the way.
What You Get With a 423 Number From Tonet
Every plan includes every feature. You pick a 423 number in the dashboard, add a card, deposit $15, and you are taking calls in about five minutes.
Auto Attendant
Record a greeting, map keys 1 through 9 to users, groups, voicemail or another menu. Great for a shop that handles sales and service on the same line.
Call Recording
Flip recording on per number, incoming or outgoing. Recordings are kept 90 days by default and come with a searchable transcript.
AI Transcription
Recorded calls get a speaker-labelled transcript, and every voicemail gets one too. Answered calls get a short summary with the outcome and next steps.
Business SMS
Send and receive texts from your 423 number, with up to ten attachments per message. Sending needs the one-time 10DLC carrier registration, filed from the dashboard.
Mobile App
iOS and Android apps use the same login as the dashboard. Take the office line on a job site in Erwin or at a trade show in Chattanooga.
Daily Billing
Plans start at $10 per user per month, billed daily against a prepaid balance. Add someone during a busy week, drop them later, pay only for the days they were active.
Frequently Asked Questions
Can I get a 423 number if I am not in Tennessee?
Yes. You pick the area code in the dashboard and the number is yours. No Tennessee address, company or SIM is needed, and the number works from the browser, the mobile app or a desk phone anywhere.
How much does a 423 number cost?
Numbers are $2.50 per number per month. Plans are $10 per user per month on Pay As You Go, or $15 per user for Unlimited US calling and texting under fair-use. No contract, no setup fee.
Can I port my existing 423 number to Tonet?
Yes, porting in is free. Most ports complete in 7 to 10 business days, sometimes longer depending on your current carrier. Your number keeps working the whole time, with no downtime.
Will one 423 number ring my whole team?
Yes. Build a ring group with everyone who should answer, turn on Call Queue, and the number rings every member at once. If no one picks up, the caller lands in the group voicemail with a transcript.
Can I use a Tonet 423 number for banking 2FA codes?
A Tonet number is a VoIP number, and banks and apps like PayPal usually refuse one-time codes to those. Other apps are case by case, so do not count on it. For dependable verification codes, a US SIM is the safer route.
Pick a 423 Number and Start Taking Calls Today
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