Connect with east Tennessee's manufacturing renaissance with a 423 virtual number — the primary code serving Volkswagen's Chattanooga plant, Oak Ridge National Laboratory, and America's first gigabit smart city. Activate instantly.
Area code 423 covers East Tennessee — Chattanooga, Kingsport, Johnson City, and the counties bordering Georgia, North Carolina, and Virginia. Chattanooga has undergone one of the most celebrated urban transformations in the US, driven by Volkswagen's assembly plant, EPB's gigabit fiber network (the first municipal gigabit network in the US), and Amazon's regional distribution centers. The Oak Ridge National Laboratory, partially served by the 423 zone, is one of the US Department of Energy's flagship research sites. The Tennessee Valley Authority's hydroelectric infrastructure and the region's outdoor recreation economy round out a diverse and rapidly growing corridor.
From Nashville to Murfreesboro 423 covers the South Central region of Tennessee.
Volkswagen's Chattanooga assembly plant was the company's first new North American facility in decades and attracts a supply chain of tier-1 and tier-2 automotive suppliers. A 423 number positions vendors in Chattanooga's automotive ecosystem.
Oak Ridge National Lab, partially in the 423 region, is one of DOE's flagship research facilities with a $2B+ annual budget. National security, energy, and research technology vendors need a local east Tennessee presence.
Chattanooga's EPB built the first municipal gigabit fibre network in the US, making it a national model for smart city infrastructure. Technology firms and innovation businesses gain credibility with a local 423 number.
Amazon, FedEx, and multiple national distributors operate major logistics facilities in the 423 zone. A local Chattanooga number positions supply chain, IT, and support service firms in this growing logistics hub.
Every 423 number delivers fourteen professional tools for east Tennessee's manufacturing-and-research economy — compliance recording for Volkswagen's supplier quality requirements, 24/7 routing for Amazon's distribution operations, and IVR for Oak Ridge National Laboratory's research and contracting community.
Redirect every call to any device — mobile, desk phone, or laptop. Set rules by time, caller, or team.
Four steps. Five minutes. No technical setup, no hardware required.
Browse 423 numbers by Chattanooga, Johnson City, or Kingsport prefix — or port your existing east Tennessee number for free.
Select a plan for your east Tennessee team — Volkswagen supplier, Oak Ridge contractor, or Chattanooga logistics firm, every feature included.
Configure your 423 line with Eastern Time routing for VW Chattanooga's manufacturing schedule and the Oak Ridge National Laboratory's research calendar.
Take 423 calls anywhere — VW's supplier network, Oak Ridge's contractor community, and Chattanooga's business corridor all see a trusted local number.
Pick a region, then select any state to see every active area code with city coverage, time zones, and a number-picker shortcut.
Everything you need to know before getting a virtual 423 phone number. Our team is one click away for anything else.
Area code 423 serves Tennessee (TN), covering Nashville, Memphis, Knoxville, Chattanooga and surrounding communities in the Central Time (CT) zone.
A local 423 number shows a familiar Tennessee area code, which increases answer rates from local customers. A toll-free number (800, 888, etc.) is free for the caller to dial. Many businesses use a 423 local number alongside a toll-free number.
Every 423 number includes call forwarding, voicemail-to-email, two-way SMS/MMS, IVR auto-attendant, call queuing, business-hours routing, recording, analytics, and more — all included on every plan with no add-ons.
The 423 area code follows Central Time (CT) (UTC-6). TKOS routing rules, business hours, and call schedules all respect this time zone automatically — no manual configuration needed.
Yes. TKOS 423 numbers are 100% virtual — establish a Tennessee presence from anywhere in the world. Calls, texts, and voicemails route to any device you choose.
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