CallataGuidesGet a local business phone number in Kingsport, TN
Kingsport's area code, prefixes and carriers from NANPA records, and how to put a Kingsport number in front of your customers.
- Area code
- 423
- Exchanges
- 32NANPA-assigned
- Carriers
- 12
- Population
- 57,109Census 2024 est.
Area codes in Kingsport
Kingsport city is a Census place in Sullivan County, Tennessee, with an estimated 57,109 residents in 2024. All 32 exchanges NANPA lists for its rate center are in area code 423. 423 is part of an overlay with 729, so a new local number in Kingsport may carry any of those codes depending on which have numbers available. Kingsport is in the Eastern and Central time zone.
According to NANPA's dialing-plan data, local calls within 423 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 423 | 32 | 100% | 1995 | 729 | Eastern and Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Kingsport
12 carriers hold the 32 exchanges assigned to Kingsport's rate center. United Telephone-southeast-tn d/b/a Centurylink - TN has the most, with 13. 22 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. Holding a code means NANPA assigned that block of numbers to the carrier for this rate center; individual numbers may since have been ported elsewhere.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| United Telephone-southeast-tn d/b/a Centurylink - TN | 13 | 41% |
| Metropcs, INC. | 5 | 16% |
| New Cingular Wireless PCS, LLC - Ga | 3 | 9.4% |
| Cellco Partnership d/b/a Verizon Wireless - TN | 3 | 9.4% |
| Suncom d/b/a T-mobile USA | 1 | 3.1% |
| Teleport Communications America, LLC - TN | 1 | 3.1% |
| Mountainet Telephone Company - Va | 1 | 3.1% |
| Bandwidth.com CLEC, LLC - TN | 1 | 3.1% |
| Level 3 Communications, LLC - TN | 1 | 3.1% |
| Charter Ip Enabled Services, LLC | 1 | 3.1% |
| Paetec Itel, LLC | 1 | 3.1% |
| Onvoy, LLC - TN | 1 | 3.1% |
Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.
Exchanges (NPA-NXX) assigned in Kingsport
These are the central office codes NANPA records for Kingsport. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2001. 1 of the 32 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 423 | 224, 229, 230, 245, 246, 247, 251, 276, 288, 343, 367, 378, 390, 392, 398, 408, 429, 480, 530, 578, 579, 684, 723, 732, 765, 782, 817, 830, 857, 863, 963, 967 |
Source: NANPA utilized central office code file.
When Kingsport's exchanges were assigned
Assignment dates show when each block of Kingsport numbers was added to the local supply.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 6 | 46% |
| 2010s | 6 | 46% |
| 2020s | 1 | 7.7% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
Rate centers and local calling in Kingsport
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Kingsport's numbers are rated to the KINGSPORT rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Kingsport number.
New local numbers are drawn from carrier inventory, so the exact 423 numbers available change over time; porting an existing number is free.
Who does business near Kingsport
Kingsport is part of the Kingsport-Bristol, TN-VA metro area, home to 314,000 people in 2024. County Business Patterns counted 6,020 business establishments in the Kingsport, TN-VA metro area in 2023, employing 101,022 people. The largest sectors by establishment count are retail trade (1,114), health care and social assistance (778), and other services (except public administration) (686).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 264 | 5,978 | 22.6 |
| Physician practices | 237 | 3,923 | 16.6 |
| Full-service restaurants | 214 | 4,349 | 20.3 |
| Law offices | 112 | 435 | 3.9 |
| Insurance agencies and brokerages | 107 | 405 | 3.8 |
| Dental offices | 84 | 831 | 9.9 |
| Landscaping services | 83 | 621 | 7.5 |
| Residential remodelers | 80 | 368 | 4.6 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Setting up a Kingsport business line
Callata is a business phone system priced at $99 a month with 5 users included, then $20 per additional user. Callata Office includes up to 3 local business numbers, unlimited inbound calling, 1,500 pooled outbound US and Canada minutes per user each month, a browser softphone that can also ring your cell, voicemail with transcription, call recording with AI summaries, business-hours routing and E911 on every number.
If you already have a number in Kingsport, porting it to Callata is free. Texting from a local number requires a one-time carrier registration (10DLC, $49), and the numbers available in any area code depend on carrier inventory when you choose them.
Optional AI agents (receptionist, sales, support or scheduler) can answer calls after hours or when nobody picks up, take messages, text, email and transfer to your team. They are billed from prepaid AI minutes at $0.25 per minute, identify themselves as AI, and may only place outbound calls to people who consented, between 8am and 9pm.
Per-seat phone plans multiply by headcount. For the rounded average establishment size in the Kingsport, TN-VA metro area, 17 users on RingCentral RingEX Core come to $510.00 a month and on Ooma Office Pro $424.15, at month-to-month list prices checked September 28, 2026. On Callata the same 17 people cost $339.00 a month, less than either per-seat plan.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $339.00 | $4,068.00 |
| Quo (Starter) | $19.00 per user | $323.00 | $3,876.00 |
| Nextiva (Core) | $23.00 per user | $391.00 | $4,692.00 |
| Ooma (Office Pro) | $24.95 per user | $424.15 | $5,089.80 |
| Dialpad (Standard) | $27.00 per user | $459.00 | $5,508.00 |
| RingCentral (RingEX Core) | $30.00 per user | $510.00 | $6,120.00 |
Competitor prices are each vendor's published month-to-month list price per user for its lowest plan that includes business calling and texting, checked September 28, 2026: Quo Starter $19, Nextiva Core $23, Ooma Office Pro $24.95 (Essentials excludes texting; one-time $29.95 activation not included), Dialpad Standard $27, RingCentral RingEX Core $30 ($20 billed annually). Prices exclude taxes and fees and may change; annual contracts lower some competitors' prices.
Frequently asked questions
What area code is Kingsport, TN?
423. All exchanges NANPA lists for Kingsport are in 423.
How many phone companies have exchanges in Kingsport?
12, holding 32 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Kingsport business number?
Yes. Porting an existing number to Callata is free. Texting from it starts after carrier registration (10DLC), a one-time $49 fee.
How much is a business phone line in Kingsport?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 17 users come to $339.00 a month. For comparison, 17 users on RingCentral RingEX Core list at $510.00 a month (checked September 28, 2026).