Get a local business phone number in Greeneville, TN
Greeneville's area code, prefixes and carriers from NANPA records, and how to put a Greeneville number in front of your customers.
- Area code
- 423
- Exchanges
- 20NANPA-assigned
- Carriers
- 8
- Population
- 15,979Census 2024 est.
Area codes in Greeneville
With 15,979 residents in the Census 2024 estimate, Greeneville sits in Greene County, Tennessee. All 20 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 Greeneville may carry any of those codes depending on which have numbers available. Greeneville 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 | 20 | 100% | 1995 | 729 | Eastern and Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Greeneville
8 carriers hold the 20 exchanges assigned to Greeneville's rate center. United Telephone-southeast-tn d/b/a Centurylink - TN has the most, with 7. 13 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Greeneville can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| United Telephone-southeast-tn d/b/a Centurylink - TN | 7 | 35% |
| Cellco Partnership d/b/a Verizon Wireless - TN | 5 | 25% |
| Level 3 Communications, LLC - TN | 2 | 10% |
| Suncom d/b/a T-mobile USA | 2 | 10% |
| New Cingular Wireless PCS, LLC - Ga | 1 | 5.0% |
| Bandwidth.com CLEC, LLC - TN | 1 | 5.0% |
| Onvoy, LLC - TN | 1 | 5.0% |
| Nuso, LLC | 1 | 5.0% |
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.
Local prefixes for Greeneville
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Greeneville. The earliest assignment date recorded in the file for these codes is 2002. 1 of the 20 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 423 | 278, 329, 359, 470, 525, 552, 588, 609, 620, 636, 638, 639, 783, 787, 798, 812, 820, 823, 831, 972 |
Source: NANPA utilized central office code file.
When Greeneville's exchanges were assigned
The table groups Greeneville's exchanges by the decade NANPA recorded them as assigned.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 4 | 44% |
| 2010s | 4 | 44% |
| 2020s | 1 | 11% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
How local numbers work in Greeneville
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Greeneville's numbers are rated to the GREENEVL rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Greeneville number.
If your business already has a Greeneville number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
Who does business near Greeneville
Greeneville is part of the Greeneville, TN micropolitan area, home to 73,398 people in 2024. County Business Patterns counted 1,257 business establishments in the Greeneville, TN micropolitan area in 2023, employing 23,957 people. The largest sectors by establishment count are retail trade (242), health care and social assistance (152), and accommodation and food services (138).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 58 | 1,448 | 25.0 |
| Full-service restaurants | 44 | 553 | 12.6 |
| Physician practices | 33 | 250 | 7.6 |
| Insurance agencies and brokerages | 20 | 106 | 5.3 |
| Law offices | 18 | 87 | 4.8 |
| Pharmacies and drug stores | 15 | 238 | 15.9 |
| Plumbing, heating and air-conditioning contractors | 15 | 108 | 7.2 |
| Landscaping services | 15 | 86 | 5.7 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Setting up a Greeneville 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.
Porting a number you already use in Greeneville is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.
AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.
A 19-person team is the benchmark here, the rounded average establishment size in the Greeneville, TN micropolitan area. Billed per seat at month-to-month list prices (checked September 28, 2026), RingCentral RingEX Core costs $570.00 a month and Ooma Office Pro $474.05. Callata comes to $379.00 a month for 19 users ($99 a month with 5 users included, then $20 per additional user), below both.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $379.00 | $4,548.00 |
| Quo (Starter) | $19.00 per user | $361.00 | $4,332.00 |
| Nextiva (Core) | $23.00 per user | $437.00 | $5,244.00 |
| Ooma (Office Pro) | $24.95 per user | $474.05 | $5,688.60 |
| Dialpad (Standard) | $27.00 per user | $513.00 | $6,156.00 |
| RingCentral (RingEX Core) | $30.00 per user | $570.00 | $6,840.00 |
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 Greeneville, TN?
423. All exchanges NANPA lists for Greeneville are in 423.
How many phone companies have exchanges in Greeneville?
8, holding 20 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Greeneville 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 Greeneville?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 19 users come to $379.00 a month. For comparison, 19 users on RingCentral RingEX Core list at $570.00 a month (checked September 28, 2026).