---
title: "Area code 920: Wisconsin, United States"
url: "https://lookvalid.com/area-code/920.md"
canonical_url: "https://lookvalid.com/area-code/920"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 920 serves Wisconsin, United States. Number formats, numbering rules, a live phone validator and the other codes in Wisconsin."
---

# Area code 920: Wisconsin, United States

Area code 920 serves Wisconsin, United States. Number formats, numbering rules, a live phone validator and the other codes in Wisconsin.

NANPA lists 784 central office codes (prefixes) in use in area code 920, held by 64 holders across 126 rate centers.
Wisconsin Bell holds the most prefixes, 141 (18%). 77% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 2,289 complaints on file for 1,864 numbers in 920, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1997-07-26
- Time zone: Central (C)
- Assigned overlays: 274 (2023-05-05)
- Prefixes in use: 784
- Pooled prefixes: 600 (77%)
- Rate centers: 126
- Companies holding prefixes: 64
- Assignment dates on file: 2001-02-05 to 2025-10-08 (306 prefixes)
- ZIP codes in its places: 132

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| GREEN BAY | 110 | 14% |
| APPLETON | 94 | 12% |
| OSHKOSH | 40 | 5% |
| FONDDU LAC | 34 | 4% |
| SHEBOYGAN | 33 | 4% |
| MANITOWOC | 24 | 3% |
| DE PERE | 21 | 3% |
| NEENAH | 20 | 3% |
| 118 other rate centers | 408 | 52% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Wisconsin Bell | 141 | 18% |
| Verizon Wireless | 62 | 8% |
| United States Cellular | 50 | 6% |
| Level 3 Communications | 46 | 6% |
| New Cingular Wireless PCS | 45 | 6% |
| Frontier North | 42 | 5% |
| 58 other carriers | 398 | 51% |

A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company.

## History

- 1947-01-01: Area code 414, named as the parent of 920 in the NANPA report, was in service.
- 1997-07-26: Area code 920 went into service.
- 2023-05-05: Area code 274 went into service as an overlay in the same area as 920.

## Nearest area codes

The area codes closest to 920, measured between the centers of the ZIP code places they serve, are 262 (about 81 miles), 353 (about 87 miles), 608 (about 100 miles), 534 (about 132 miles) and 224 (about 134 miles).

## ZIP codes

132 ZIP codes fall in places that have a rate center in this area code. The places with the most are Green Bay, WI (12 ZIP codes), Appleton, WI (6 ZIP codes) and Oshkosh, WI (5 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

2,289 complaints for 1,864 numbers. Numbers whose latest complaint falls in each year:

- 2023: 88
- 2024: 95
- 2025: 166

## Questions

### Where is area code 920?

NANPA assigns area code 920 to Wisconsin, United States.

### In which state does area code 920 sit?

Wisconsin. 920 is one of 8 area codes the NANPA table assigns to the state.

### Which places does area code 920 cover?

The places with the most ZIP codes among the rate centers in 920 are Green Bay, WI, Appleton, WI and Oshkosh, WI. The rate center list on this page shows all of them.

### Who owns area code 920?

NANPA assigns area codes. Within 920, Wisconsin Bell holds the most prefixes, 141 prefixes or 18%.

### Which time zone does 920 use?

The NANPA NPA report lists the time zone for 920 as Central (C).

### What year did 920 enter service?

The NANPA NPA report gives an in-service date of 1997-07-26, so 920 has been in use since 1997.

### Does area code 920 have an overlay?

Yes. 274 (in service 2023-05-05) shares the same area with 920, so numbers from all of them are local to each other.

### Which area codes are nearest to 920?

The area codes closest to 920, measured between the centers of the ZIP code places they serve, are 262 (about 81 miles), 353 (about 87 miles), 608 (about 100 miles), 534 (about 132 miles) and 224 (about 134 miles).

### How many prefixes does area code 920 have?

NANPA's report dated 2026-10-17 lists 784 prefixes in service in 920, spread over 126 rate centers and 64 holders.

### Are there complaints about 920 numbers?

The FCC data on file has 2,289 complaints for 1,864 numbers in 920. They are unverified consumer reports. A number with no complaints on file is not proven safe.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).