CallataGuidesGet a local business phone number in Columbia, TN
Columbia's area code, prefixes and carriers from NANPA records, and how to put a Columbia number in front of your customers.
- Area code
- 931
- Exchanges
- 32NANPA-assigned
- Carriers
- 12
- Population
- 48,812Census 2024 est.
What area code is Columbia, TN?
Columbia, in Maury County, Tennessee, had a Census-estimated population of 48,812 in July 2024. All 32 exchanges NANPA lists for its rate center are in area code 931. Columbia is in the Eastern and Central time zone.
According to NANPA's dialing-plan data, local calls within 931 are dialed as seven digits and toll calls as 1 plus ten digits.
| Area code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 931 | 32 | 100% | 1997 | none | Eastern and Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Phone carriers in Columbia
12 carriers hold the 32 exchanges assigned to Columbia's rate center. Bellsouth Telecomm INC d/b/a South Central Bell Tel has the most, with 7. 20 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. The table counts codes by the operating company NANPA assigned them to, not by who serves each number today.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Bellsouth Telecomm INC d/b/a South Central Bell Tel | 7 | 22% |
| New Cingular Wireless PCS, LLC - Ga | 6 | 19% |
| Level 3 Communications, LLC - TN | 4 | 13% |
| Paetec Itel, LLC | 3 | 9.4% |
| Cellco Partnership d/b/a Verizon Wireless - TN | 3 | 9.4% |
| Metropcs, INC. | 2 | 6.3% |
| Onvoy, LLC - TN | 2 | 6.3% |
| Bandwidth.com CLEC, LLC - TN | 1 | 3.1% |
| Spok, INC. | 1 | 3.1% |
| Powertel Nashville Licenses, INC. | 1 | 3.1% |
| Fractel, LLC | 1 | 3.1% |
| Teleport Communications America, 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.
Local prefixes for Columbia
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Columbia. The earliest assignment date recorded in the file for these codes is 2006. 4 of the 32 were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 931 | 215, 223, 286, 328, 334, 350, 353, 374, 375, 380, 381, 384, 388, 398, 416, 446, 460, 483, 490, 505, 540, 548, 560, 626, 698, 777, 797, 840, 901, 922, 981, 982 |
Source: NANPA utilized central office code file.
When Columbia's exchanges were assigned
The table groups Columbia's exchanges by the decade NANPA recorded them as assigned.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 2 | 29% |
| 2010s | 1 | 14% |
| 2020s | 4 | 57% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
How local numbers work in Columbia
NANPA ties every exchange to a rate center. For Columbia that is COLUMBIA, so a number from one of these exchanges reads as local to people in and around Columbia.
New local numbers are drawn from carrier inventory, so the exact 931 numbers available change over time; porting an existing number is free.
Who does business near Columbia
Columbia is part of the Nashville-Davidson--Murfreesboro--Franklin, TN metro area, home to 2.2 million people in 2024. County Business Patterns counted 50,910 business establishments in the Nashville, TN metro area in 2023, employing 1,012,689 people. The largest sectors by establishment count are retail trade (6,634), health care and social assistance (5,732), and professional, scientific, and technical services (5,218).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Limited-service restaurants | 1,863 | 37,822 | 20.3 |
| Full-service restaurants | 1,681 | 44,152 | 26.3 |
| Physician practices | 1,554 | 36,323 | 23.4 |
| Insurance agencies and brokerages | 895 | 5,733 | 6.4 |
| Law offices | 801 | 5,604 | 7.0 |
| Dental offices | 787 | 6,637 | 8.4 |
| Landscaping services | 690 | 5,849 | 8.5 |
| Offices of real estate agents and brokers | 655 | 2,681 | 4.1 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
Business phone service in Columbia
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 Columbia 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.
The comparison below uses 20 users, the rounded average establishment size in the Nashville, TN metro area. At list prices checked September 28, 2026, that is $499.00 a month on Ooma Office Pro and $600.00 on RingCentral RingEX Core. Callata comes to $399.00 a month for 20 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 | $399.00 | $4,788.00 |
| Quo (Starter) | $19.00 per user | $380.00 | $4,560.00 |
| Nextiva (Core) | $23.00 per user | $460.00 | $5,520.00 |
| Ooma (Office Pro) | $24.95 per user | $499.00 | $5,988.00 |
| Dialpad (Standard) | $27.00 per user | $540.00 | $6,480.00 |
| RingCentral (RingEX Core) | $30.00 per user | $600.00 | $7,200.00 |
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 Columbia, TN?
931. All exchanges NANPA lists for Columbia are in 931.
How many phone companies have exchanges in Columbia?
12, holding 32 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Columbia 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 Columbia?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 20 users come to $399.00 a month. For comparison, 20 users on RingCentral RingEX Core list at $600.00 a month (checked September 28, 2026).