Area code
920
920 is a United States area code. Under the North American Numbering Plan it belongs to Wisconsin, which has 8 area codes in total.
Validate a number in 920
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 920 at a glance
NANPA lists 784 central office codes (prefixes) in use in area code 920, held by 64 holders across 126 rate centers.
| Fact | Value |
|---|---|
| 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 in area code 920
| 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% |
Who holds the prefixes in 920
Wisconsin Bell holds the most prefixes, 141 (18%). 77% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| 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. Find which carrier a number is on, or browse the prefix holders.
History of area code 920
- 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.
Area codes nearest to 920
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
Overlay codes in the same area
- 274
ZIP codes in area code 920
132 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Green Bay, WI | 12 |
| Appleton, WI | 6 |
| Oshkosh, WI | 5 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 920 numbers
2,289 FCC complaints are on file for 1,864 numbers in 920, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 88 |
| 2024 | 95 |
| 2025 | 166 |
Other area codes in Wisconsin
Wisconsin is one state with 8 area codes in the NANPA table. 920 is one of them.
Next to 920 in the numbering table
These are the codes just before and after 920 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 920 was first assigned in Wisconsin. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Wisconsin next to a 920 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 920
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.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.