Get a local business phone number in Oostburg, WI
Oostburg's area code, prefixes and carriers from NANPA records, and how to put a Oostburg number in front of your customers.
- Area code
- 920
- Exchanges
- 4NANPA-assigned
- Carriers
- 3
- Population
- 3,059Census 2024 est.
Area codes in Oostburg
Oostburg, in Sheboygan County, Wisconsin, had a Census-estimated population of 3,059 in July 2024. All 4 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 Oostburg may carry any of those codes depending on which have numbers available. Oostburg 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 | 4 | 100% | 1997 | 274 | Central |
Source: NANPA utilized central office code file and NPA report, dated 10/01/2026.
Oostburg exchanges by carrier
3 carriers hold the 4 exchanges assigned to Oostburg's rate center. Level 3 Communications, LLC - Wi has the most, with 2. 4 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.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Level 3 Communications, LLC - Wi | 2 | 50% |
| T-mobile USA, INC. | 1 | 25% |
| Frontier North INC. - Wi | 1 | 25% |
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 Oostburg
Each prefix below is a block of up to 10,000 numbers that NANPA assigned to Oostburg's rate center (OOSTBURG). The earliest assignment date recorded in the file for these codes is 2001. None were assigned in 2020 or later.
| Area code | Prefixes (NXX) |
|---|---|
| 920 | 316, 552, 564, 587 |
Source: NANPA utilized central office code file.
What makes a number local to Oostburg
What a caller sees as "local" is the area code plus prefix. In Oostburg, those come from the OOSTBURG rate center, as recorded by NANPA.
If your business already has a Oostburg number, porting it to Callata is free and keeps it on your cards, listings and vehicles.
The local business market
Oostburg 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).
| Industry | Establishments | Employees | Employees per establishment |
|---|---|---|---|
| Full-service restaurants | 96 | 1,461 | 15.2 |
| Limited-service restaurants | 79 | 1,517 | 19.2 |
| Physician practices | 66 | — | — |
| Landscaping services | 61 | 291 | 4.8 |
| Insurance agencies and brokerages | 54 | 200 | 3.7 |
| Drinking places | 54 | 250 | 4.6 |
| Dental offices | 44 | 385 | 8.8 |
| Plumbing, heating and air-conditioning contractors | 39 | 417 | 10.7 |
Selected small-business industries (six-digit NAICS) covered by these guides. Source: Census County Business Patterns 2023.
A Oostburg 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 Oostburg 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.
| Provider (plan) | Pricing basis | Per month | Per 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 Oostburg, WI?
920. All exchanges NANPA lists for Oostburg are in 920.
How many phone companies have exchanges in Oostburg?
3, holding 4 exchanges between them, according to NANPA's 10/01/2026 file.
Can I keep my existing Oostburg 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 Oostburg?
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).