CallataGuidesBusiness phone system for plumbing, heating and air-conditioning contractors in Knoxville, TN
Plumbing, heating and air-conditioning contractors in the Knoxville, TN metro area: 275 establishments in 2023, the local area codes, and what phone service costs a 13-person team.
- Establishments
- 275CBP 2023
- Employees
- 3,649mid-March 2023
- Per 100k residents
- 28.7U.S. 32.7
- Rank
- 73rd of 920areas by count
How many plumbing, heating and air-conditioning contractors are in Knoxville, TN?
The Census Bureau's 2023 County Business Patterns lists 275 establishments classified as Plumbing, Heating, and Air-Conditioning Contractors (NAICS 238220) in the Knoxville, TN metro area. They employed 3,649 people in mid-March and paid $244.0 million in annual payroll. By establishment count the area is 73rd out of 920 areas with published figures for plumbing, heating and air-conditioning contractors.
Measured against its 958,000 residents (2024 estimate), the area has 28.7 plumbing, heating and air-conditioning contractors per 100,000 people; the U.S. rate is 32.7, so Knoxville, TN is 12.2% below the national figure. The average establishment here has 13.3 employees, compared with 10.9 nationally. Payroll per employee comes to $66,881, 9.2% below the national $73,693.
| Measure | Knoxville, TN | Tennessee | United States |
|---|---|---|---|
| Establishments | 275 | 1,899 | 111,207 |
| Mid-March employees | 3,649 | 25,248 | 1,214,761 |
| Annual payroll | $244,047,000 | $1,667,081,000 | $89,519,407,000 |
| Employees per establishment | 13.3 | 13.3 | 10.9 |
| Payroll per employee | $66,881 | $66,028 | $73,693 |
| Establishments per 100,000 residents | 28.7 | 26.3 | 32.7 |
Census County Business Patterns 2023 (mid-March employment; annual payroll). Employees and payroll flagged high-noise are shown but not used in the text. Residents: Census Vintage 2024 estimates.
How big plumbing, heating and air-conditioning contractors in Knoxville, TN are
Of the plumbing, heating and air-conditioning contractors in Knoxville, TN that had employees in March 2023, 52.6% had fewer than five (the U.S. share is 58.3%). 69.3% had fewer than ten. When a business has only a few people, whoever is free answers the phone, and calls that arrive while everyone is busy go to voicemail unless they are routed somewhere else.
| Employment size | Establishments | Share | U.S. share |
|---|---|---|---|
| 1–4 employees | 144 | 52.6% | 58.3% |
| 5–9 employees | 46 | 16.8% | 18.5% |
| 10–19 employees | 41 | 15.0% | 11.8% |
| 20–49 employees | 31 | 11.3% | 7.5% |
| 50 or more employees | 12 | 4.4% | 3.8% |
Employment-size classes count establishments by mid-March 2023 employment. Establishments with no March employees are excluded from the size classes, so shares are of establishments with employees. Source: Census County Business Patterns 2023.
Why the phone matters for plumbing, heating and air-conditioning contractors in Knoxville, TN
Plumbing and HVAC calls are often emergencies: no heat, no cooling or water where it should not be. Homeowners call down a list until someone answers, so a missed call is frequently a lost job.
Typical inbound and outbound calls for plumbing, heating and air-conditioning contractors in Knoxville, TN:
- A homeowner calls because the air conditioning stopped working.
- A tenant calls about a burst pipe.
- A customer calls to book a seasonal tune-up.
Business texting for plumbing, heating and air-conditioning contractors
Contractors text arrival windows, technician names and invoices.
Team texting on Callata runs from your business number, so replies come from the practice or shop rather than someone's personal phone. It turns on after the one-time $49 carrier registration (10DLC) is approved.
What a phone system costs a plumbing and HVAC contractor in Knoxville, TN
The average plumbing and HVAC contractor in Knoxville, TN has 13.3 employees, so a 13-person team is a reasonable benchmark. Priced per seat, 13 users would run $390.00 a month on RingCentral RingEX Core and $324.35 on Ooma Office Pro (month-to-month list prices, checked September 28, 2026). Callata comes to $259.00 a month for 13 users ($99 a month with 5 users included, then $20 per additional user), below both.
Over a year, that is $1,572 less than RingCentral for a plumbing and HVAC contractor in Knoxville, TN of that size. Annual contracts lower some competitors' prices, so compare the plan you would actually sign.
| Provider (plan) | Pricing basis | Per month | Per year |
|---|---|---|---|
| Callata (Callata Office) | $99 incl. 5 users, $20 per extra user | $259.00 | $3,108.00 |
| Quo (Starter) | $19.00 per user | $247.00 | $2,964.00 |
| Nextiva (Core) | $23.00 per user | $299.00 | $3,588.00 |
| Ooma (Office Pro) | $24.95 per user | $324.35 | $3,892.20 |
| Dialpad (Standard) | $27.00 per user | $351.00 | $4,212.00 |
| RingCentral (RingEX Core) | $30.00 per user | $390.00 | $4,680.00 |
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.
Getting a local number in Knoxville, TN
NANPA records place the exchanges of the area's named cities and towns in 2 area codes. 865 has the most, with 409 of 436 exchanges (94%). A local number lets customers in Knoxville, TN call without dialing out of area. Callata includes up to 3 local numbers, and which numbers are open in an area code depends on carrier inventory when you choose.
| Area code | Exchanges | Time zone | In service since | Overlay with |
|---|---|---|---|---|
| 865 | 409 | Eastern | 1999 | none |
| 423 | 27 | Eastern and Central | 1995 | 729 |
Exchanges are NANPA-assigned central office codes (NPA-NXX) in the rate centers matched to the area's named places. Source: NANPA utilized code and NPA reports.
How Callata works for plumbing, heating and air-conditioning contractors
Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.
Porting a number you already use in Knoxville, TN 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.
Frequently asked questions
How many plumbing, heating and air-conditioning contractors are there in Knoxville, TN?
Census County Business Patterns counted 275 plumbing, heating and air-conditioning contractors in the Knoxville, TN metro area in 2023. They employed 3,649 people in mid-March.
What does a business phone system cost for a 13-person plumbing and HVAC contractor?
At month-to-month list prices checked September 28, 2026, 13 users cost $390.00 a month on RingCentral RingEX Core and $324.35 on Ooma Office Pro. On Callata, $99 a month with 5 users included, then $20 per additional user, the same team pays $259.00.
What area code should a plumbing and HVAC contractor in Knoxville, TN use?
Area code 865 has the most assigned exchanges among the area's named places, followed by 423. If you already have a local number, you can port it to Callata for free.
Can an AI receptionist answer calls for a plumbing and HVAC contractor?
Yes. Callata's optional AI agents can answer when the team is busy or closed, take a message, text, email or transfer the call. They disclose that they are AI and are billed from prepaid AI minutes at $0.25 per minute.