CallataGuides

Get a local business phone number in Greenbush, WI

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

Area code
920
Exchanges
2NANPA-assigned
Carriers
2
Population
2,229Census 2024 est.

Area codes in Greenbush

Greenbush town is a Census town in Sheboygan County, Wisconsin, with an estimated 2,229 residents in 2024. All 2 exchanges NANPA lists for its rate center are in area code 920. 920 is part of an overlay with 274, so a new local number in Greenbush may carry any of those codes depending on which have numbers available. Greenbush is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 920 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Area codes with exchanges in Greenbush, WI
Area codeExchanges hereShareIn service sinceOverlay withTime zone
9202100%1997274Central

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

Greenbush exchanges by carrier

2 carriers hold the 2 exchanges assigned to Greenbush's rate center. Onvoy Spectrum, LLC has the most, with 1. 2 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in Greenbush can come from any of these blocks; once it is yours, porting lets it move between providers.

Carriers holding exchanges in Greenbush, WI
Carrier (NANPA operating company)ExchangesShare
Onvoy Spectrum, LLC150%
Frontier North INC. - Wi150%

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.

Exchanges (NPA-NXX) assigned in Greenbush

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Greenbush's rate center (GREENBUSH). The earliest assignment date recorded in the file for these codes is 2021. 1 of the 2 were assigned in 2020 or later.

Prefixes assigned in Greenbush, WI
Area codePrefixes (NXX)
920506, 526

Source: NANPA utilized central office code file.

What makes a number local to Greenbush

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

New local numbers are drawn from carrier inventory, so the exact 920 numbers available change over time; porting an existing number is free.

The local business market

Greenbush is part of the Sheboygan, WI metro area, home to 118,000 people in 2024. County Business Patterns counted 2,671 business establishments in the Sheboygan, WI metro area in 2023, employing 53,030 people. The largest sectors by establishment count are retail trade (357), health care and social assistance (347), and other services (except public administration) (304).

Selected industries in the Sheboygan, WI metro area, 2023
IndustryEstablishmentsEmployeesEmployees per establishment
Full-service restaurants961,46115.2
Limited-service restaurants791,51719.2
Physician practices66——
Landscaping services612914.8
Insurance agencies and brokerages542003.7
Drinking places542504.6
Dental offices443858.8
Plumbing, heating and air-conditioning contractors3941710.7

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

A Greenbush 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 Greenbush 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 the Sheboygan, WI metro area, 20 users on RingCentral RingEX Core come to $600.00 a month and on Ooma Office Pro $499.00, at month-to-month list prices checked September 28, 2026. Callata comes to $399.00 a month for 20 users ($99 a month with 5 users included, then $20 per additional user), below both.

Monthly list price for a 20-person team
Provider (plan)Pricing basisPer monthPer 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 Greenbush, WI?

920. All exchanges NANPA lists for Greenbush are in 920.

How many phone companies have exchanges in Greenbush?

2, holding 2 exchanges between them, according to NANPA's 10/01/2026 file.

Can I keep my existing Greenbush 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 Greenbush?

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).