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Get a local business phone number in Libby, MT

Libby's area code, prefixes and carriers from NANPA records, and how to put a Libby number in front of your customers.

Area code
406
Exchanges
6NANPA-assigned
Carriers
4
Population
3,235Census 2024 est.

Libby area codes

Libby, in Lincoln County, Montana, had a Census-estimated population of 3,235 in July 2024. All 6 exchanges NANPA lists for its rate center are in area code 406. Libby 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 codes with exchanges in Libby, MT
Area codeExchanges hereShareIn service sinceOverlay withTime zone
4066100%1947noneMountain

Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.

Who holds Libby phone exchanges

4 carriers hold the 6 exchanges assigned to Libby's rate center. Ziply Fiber Montana, LLC d/b/a Ziply Fiber has the most, with 2. 6 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.

Carriers holding exchanges in Libby, MT
Carrier (NANPA operating company)ExchangesShare
Ziply Fiber Montana, LLC d/b/a Ziply Fiber233%
New Cingular Wireless PCS, LLC233%
Cellco Partnership d/b/a Verizon Wireless - MT117%
Onvoy, LLC - MT117%

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.

Libby phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Libby's rate center (LIBBY). The earliest assignment date recorded in the file for these codes is 2004. 2 of the 6 were assigned in 2020 or later.

Prefixes assigned in Libby, MT
Area codePrefixes (NXX)
406283, 291, 293, 334, 405, 918

Source: NANPA utilized central office code file.

When Libby's exchanges were assigned

The table groups Libby's exchanges by the decade NANPA recorded them as assigned.

Libby, MT: exchanges by decade assigned
Decade assignedExchangesShare
2000s133%
2020s267%

Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.

What makes a number local to Libby

NANPA ties every exchange to a rate center. For Libby that is LIBBY, so a number from one of these exchanges reads as local to people in and around Libby.

New local numbers are drawn from carrier inventory, so the exact 406 numbers available change over time; porting an existing number is free.

The local business market

Libby 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).

Selected industries in Montana, 2023
IndustryEstablishmentsEmployeesEmployees per establishment
Offices of real estate agents and brokers1,100——
New single-family housing construction contractors1,0753,3753.1
Full-service restaurants1,06020,16219.0
Residential remodelers8402,1222.5
Limited-service restaurants80615,35219.0
Plumbing, heating and air-conditioning contractors7124,4486.2
Landscaping services6942,4353.5
Law offices6782,6733.9

Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.

Setting up a Libby 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 Libby 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.

Monthly list price for a 10-person team
Provider (plan)Pricing basisPer monthPer 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 Libby, MT?

406. All exchanges NANPA lists for Libby are in 406.

How many phone companies have exchanges in Libby?

4, holding 6 exchanges between them, according to NANPA's 10/01/2026 file.

Can I keep my existing Libby 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 Libby?

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).