CallataGuidesGet a local business phone number in Green Lake, WI
Green Lake's area code, prefixes and carriers from NANPA records, and how to put a Green Lake number in front of your customers.
- Area code
- 920
- Exchanges
- 6NANPA-assigned
- Carriers
- 4
- Population
- 1,210Census 2024 est.
What area code is Green Lake, WI?
With 1,210 residents in the Census 2024 estimate, Green Lake sits in Green Lake County, Wisconsin. All 6 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 Green Lake may carry any of those codes depending on which have numbers available. Green Lake 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 code | Exchanges here | Share | In service since | Overlay with | Time zone |
|---|---|---|---|---|---|
| 920 | 6 | 100% | 1997 | 274 | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Who holds Green Lake phone exchanges
4 carriers hold the 6 exchanges assigned to Green Lake's rate center. New Cingular Wireless PCS, LLC - Il has the most, with 3. 6 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 |
|---|---|---|
| New Cingular Wireless PCS, LLC - Il | 3 | 50% |
| United States Cellular - Wi | 1 | 17% |
| Brightspeed of North Central Wisconsin, LLC | 1 | 17% |
| Charter Ip Enabled Services, LLC | 1 | 17% |
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.
Green Lake phone prefixes
A prefix (NXX) is the three digits after the area code. Numbers starting with these prefixes are rated as local to Green Lake. The earliest assignment date recorded in the file for these codes is 2007. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 920 | 229, 294, 299, 329, 369, 807 |
Source: NANPA utilized central office code file.
Rate centers and local calling in Green Lake
What a caller sees as "local" is the area code plus prefix. In Green Lake, those come from the GREEN LAKE rate center, as recorded by NANPA.
New local numbers are drawn from carrier inventory, so the exact 920 numbers available change over time; porting an existing number is free.
Businesses around Green Lake
Green Lake is outside any Census metro or micropolitan area, so the figures below are statewide. County Business Patterns counted 144,774 business establishments in Wisconsin in 2023, employing 2,642,958 people. The largest sectors by establishment count are retail trade (18,044), health care and social assistance (17,592), and accommodation and food services (15,530).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 4,988 | 87,044 | 17.5 |
| Limited-service restaurants | 3,925 | 76,596 | 19.5 |
| Physician practices | 3,107 | 63,015 | 20.3 |
| Drinking places | 2,739 | 18,206 | 6.6 |
| Insurance agencies and brokerages | 2,587 | 12,120 | 4.7 |
| Landscaping services | 2,490 | 13,641 | 5.5 |
| Residential remodelers | 2,142 | 8,173 | 3.8 |
| Offices of real estate agents and brokers | 2,071 | 5,215 | 2.5 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A Green Lake number on Callata
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 Green Lake 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 Wisconsin, 18 users on RingCentral RingEX Core come to $540.00 a month and on Ooma Office Pro $449.10, at month-to-month list prices checked September 28, 2026. Callata comes to $359.00 a month for 18 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 | $359.00 | $4,308.00 |
| Quo (Starter) | $19.00 per user | $342.00 | $4,104.00 |
| Nextiva (Core) | $23.00 per user | $414.00 | $4,968.00 |
| Ooma (Office Pro) | $24.95 per user | $449.10 | $5,389.20 |
| Dialpad (Standard) | $27.00 per user | $486.00 | $5,832.00 |
| RingCentral (RingEX Core) | $30.00 per user | $540.00 | $6,480.00 |
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 Green Lake, WI?
920. All exchanges NANPA lists for Green Lake are in 920.
How many phone companies have exchanges in Green Lake?
4, holding 6 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Green Lake 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 Green Lake?
Callata is $99 a month with 5 users included, then $20 per additional user, with up to 3 local numbers; 18 users come to $359.00 a month. For comparison, 18 users on RingCentral RingEX Core list at $540.00 a month (checked September 28, 2026).