CallataGuidesGet a local business phone number in Hardin, MT
Hardin's area code, prefixes and carriers from NANPA records, and how to put a Hardin number in front of your customers.
- Area code
- 406
- Exchanges
- 7NANPA-assigned
- Carriers
- 7
- Population
- 3,719Census 2024 est.
Hardin area codes
Hardin city is a Census place in Big Horn County, Montana, with an estimated 3,719 residents in 2024. All 7 exchanges NANPA lists for its rate center are in area code 406. Hardin is in the Mountain time zone.
According to NANPA's dialing-plan data, local calls within 406 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 |
|---|---|---|---|---|---|
| 406 | 7 | 100% | 1947 | none | Mountain |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Who holds Hardin phone exchanges
7 carriers hold the 7 exchanges assigned to Hardin's rate center. Commio, LLC has the most, with 1. 7 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 |
|---|---|---|
| Commio, LLC | 1 | 14% |
| Onvoy, LLC - MT | 1 | 14% |
| Project Tel. CO., INC. | 1 | 14% |
| Qwest Corporation | 1 | 14% |
| Nuso, LLC | 1 | 14% |
| New Cingular Wireless PCS, LLC | 1 | 14% |
| Sagebrush Cellular, INC. | 1 | 14% |
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.
Hardin phone prefixes
These are the central office codes NANPA records for Hardin. A caller seeing one of them recognizes a local number. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 406 | 623, 629, 638, 665, 679, 699, 953 |
Source: NANPA utilized central office code file.
What makes a number local to Hardin
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Hardin's numbers are rated to the HARDIN rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Hardin number.
Keeping an existing Hardin number costs nothing on Callata, because porting is free; a new number depends on what carriers have open in 406 when you pick it.
The local business market
Hardin is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 42,566 business establishments in Montana in 2023, employing 409,312 people. The largest sectors by establishment count are construction (6,766), retail trade (4,706), and health care and social assistance (4,488).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Offices of real estate agents and brokers | 1,100 | — | — |
| New single-family housing construction contractors | 1,075 | 3,375 | 3.1 |
| Full-service restaurants | 1,060 | 20,162 | 19.0 |
| Residential remodelers | 840 | 2,122 | 2.5 |
| Limited-service restaurants | 806 | 15,352 | 19.0 |
| Plumbing, heating and air-conditioning contractors | 712 | 4,448 | 6.2 |
| Landscaping services | 694 | 2,435 | 3.5 |
| Law offices | 678 | 2,673 | 3.9 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A Hardin number on Callata
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 Hardin 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.
Per-seat phone plans multiply by headcount. For the rounded average establishment size in Montana, 10 users on RingCentral RingEX Core come to $300.00 a month and on Ooma Office Pro $249.50, at month-to-month list prices checked September 28, 2026. Callata comes to $199.00 a month for 10 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 | $199.00 | $2,388.00 |
| Quo (Starter) | $19.00 per user | $190.00 | $2,280.00 |
| Nextiva (Core) | $23.00 per user | $230.00 | $2,760.00 |
| Ooma (Office Pro) | $24.95 per user | $249.50 | $2,994.00 |
| Dialpad (Standard) | $27.00 per user | $270.00 | $3,240.00 |
| RingCentral (RingEX Core) | $30.00 per user | $300.00 | $3,600.00 |
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 Hardin, MT?
406. All exchanges NANPA lists for Hardin are in 406.
How many phone companies have exchanges in Hardin?
7, holding 7 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Hardin 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 Hardin?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 10 users come to $199.00 a month. For comparison, 10 users on RingCentral RingEX Core list at $300.00 a month (checked September 28, 2026).