CallataGuidesGet a local business phone number in Hamilton, MT
Hamilton's area code, prefixes and carriers from NANPA records, and how to put a Hamilton number in front of your customers.
- Area code
- 406
- Exchanges
- 8NANPA-assigned
- Carriers
- 3
- Population
- 5,383Census 2024 est.
What area code is Hamilton, MT?
Hamilton city is a Census place in Ravalli County, Montana, with an estimated 5,383 residents in 2024. All 8 exchanges NANPA lists for its rate center are in area code 406. Hamilton 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 | 8 | 100% | 1947 | none | Mountain |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Who holds Hamilton phone exchanges
3 carriers hold the 8 exchanges assigned to Hamilton's rate center. Cellco Partnership d/b/a Verizon Wireless - MT has the most, with 4. 6 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Hamilton can come from any of these blocks; once it is yours, porting lets it move between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Cellco Partnership d/b/a Verizon Wireless - MT | 4 | 50% |
| Qwest Corporation | 3 | 38% |
| New Cingular Wireless PCS, LLC | 1 | 13% |
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.
Hamilton phone prefixes
These are the central office codes NANPA records for Hamilton. A caller seeing one of them recognizes a local number. The earliest assignment date recorded in the file for these codes is 2011. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 406 | 360, 361, 363, 369, 375, 381, 802, 961 |
Source: NANPA utilized central office code file.
Rate centers and local calling in Hamilton
Phone numbers are tied to a rate center, the local calling area used to decide whether a call is local or toll. Hamilton's numbers are rated to the HAMILTON rate center in NANPA's records. A business number from one of the prefixes above shows up on customers' phones as a Hamilton number.
If your business already has a Hamilton number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
Businesses around Hamilton
Hamilton 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 Hamilton number on Callata
For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.
Porting a number you already use in Hamilton 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 Hamilton, MT?
406. All exchanges NANPA lists for Hamilton are in 406.
How many phone companies have exchanges in Hamilton?
3, holding 8 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Hamilton 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 Hamilton?
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).