920 Area Code: Green Bay, Wisconsin
Area code 920 serves Green Bay, Appleton and Oshkosh, Wisconsin in the Central time zone, in service since 1997. Consumers have filed 4,219 unwanted-call complaints against 3,667 different 920 numbers, 542 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 920 at a glance
- State
- Wisconsin
- Main cities
- Green Bay, Appleton, Oshkosh, Fond du Lac, Sheboygan, Manitowoc + 119 more
- Counties
- Brown County, Calumet County, Winnebago County, Fond du Lac County + 16 more
- Local time
- —Central
- In service since
- July 26, 1997
- Split from
- 414
- Overlay code
- 274 (2023)
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 126 rate centers, 785 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Most-reported 920 numbers
Ranked by FTC Do Not Call complaints this month, then all-time FTC and FCC complaints. Only numbers with enough complaints for a full report page are listed. Click one for what it was reported for and where.
What calls from 920 numbers are about
1,920 FTC Do Not Call complaints about 920 numbers since Jul 24. The most common named subject is debt-relief pitches, at 17% of complaints (86% of those were recorded messages). Overall, 66% of callers who answered said the call was a robocall.
FTC complaint subjects
- Other / unspecified94549%
- Debt reduction32817%
- Medical & prescriptions1679%
- Dropped call / no message1588%
- Impostor (government, business, family)1528%
- No subject given814%
- Warranties & protection plans342%
FCC complaints by call type, last 2 years
- Prerecorded Voice21362%
- Live Voice10731%
- Text Message216%
Live-voice calls are from a person; prerecorded calls are robocalls.
When 920 spam calls come in
32% of complaints that give a call time describe calls between 10am and 1pm. 94% came Monday to Friday, most on Wednesdays, the pattern of call-center robocall campaigns that run on business hours. Times are as consumers reported them to the FTC.
By hour of the day
By day of the week
Is it getting worse?
536 FTC complaints about 920 numbers in the last four weeks, down 19% on the four weeks before. FCC complaints about 920 numbers peaked in 2015 (334); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.
FTC complaints per week
FCC complaints per year
Years shown as '15 to '26; the current year is partial.
Who gets these calls
57% of the FTC complaints about 920 numbers came from people whose own phone number also starts with 920, and 61% from Wisconsin. Calls that look local to the person receiving them are the signature of neighbor spoofing: robocallers display a number from your own area code because you're more likely to answer.
Where complainants live
- Wisconsin1,17961%
- California673%
- Texas623%
- Florida503%
- New York432%
What people with 920 numbers report
People whose own number starts with 920 filed 2,108 FTC complaints since Jul 24. 52% were about calls showing another 920 number. The most common named subject was debt-relief pitches.
Area codes on the calls they reported
- 920 (same code)1,09352%
- 877 (toll-free)934%
- 833 (toll-free)904%
- 888 (toll-free)764%
- 855 (toll-free)673%
Busiest 920 prefixes this month
FTC complaints in the last 30 days, grouped by the first six digits. When one prefix collects complaints about many different numbers, a campaign is usually cycling through that block. The carrier is who NANPA assigned the prefix to, not who made the calls.
| Prefix | Complaints | Numbers | Carrier | Exchange |
|---|---|---|---|---|
| (920) 880-xxxx | 14 | 14 | Peerless Network | Algoma |
| (920) 212-xxxx | 11 | 10 | Verizon Wireless (Cellco Partnership) | Mayville |
| (920) 633-xxxx | 10 | 10 | Michigan Wireless, LLC dba Bug Tussel Wireless | Sister Bay |
| (920) 618-xxxx | 10 | 10 | AT&T Mobility (New Cingular Wireless PCS) | Suring |
| (920) 938-xxxx | 10 | 9 | Charter (Spectrum Voice) | Shiocton |
Carriers operating in 920
NANPA has assigned 785 920 prefixes (NPA-NXX central-office codes) across 126 rate centers: 34% to wireless carriers, 61% to landline and VoIP operators; 77% are pooled blocks shared by several carriers. 1 prefix was assigned in the last 12 months (newest 2026-09-03). The carrier holding a prefix is who the number was issued through. It says nothing about who is calling, since caller ID is routinely spoofed.
| Carrier | Type | Prefixes | Rate centers | Newest assignment |
|---|---|---|---|---|
| Ameritech (AT&T) | Incumbent landline (ILEC) | 141(18%) | 30 | 2013-07-30 |
| Verizon Wireless (Cellco Partnership) | Wireless | 62(8%) | 22 | 2023-09-27 |
| UScellular | Wireless | 50(6%) | 23 | 2023-08-02 |
| Level 3 (Lumen) | Competitive / VoIP (CLEC) | 46(6%) | 35 | 2022-12-06 |
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 45(6%) | 22 | 2023-11-14 |
| Frontier Communications | Incumbent landline (ILEC) | 42(5%) | 36 | 2001-06-18 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 39(5%) | 26 | 2024-06-07 |
| New Cell dba Cellcom | Wireless | 33(4%) | 20 | 2003-02-28 |
| T-Mobile USA | Wireless | 30(4%) | 13 | 2024-02-28 |
| Twc Ip Enabled Services, LLC | Competitive / VoIP (CLEC) | 23(3%) | 20 | 2023-03-07 |
| PAETEC (Windstream) | Competitive / VoIP (CLEC) | 22(3%) | 14 | 2022-02-25 |
| Charter (Spectrum Voice) | Competitive / VoIP (CLEC) | 20(3%) | 20 | 2024-06-17 |
Largest rate centers (exchanges) by prefixes: Green Bay (111), Appleton (94), Oshkosh (40), Fond du Lac (34), Sheboygan (33), Manitowoc (24), De Pere (21), Neenah (20), Beaver Dam (19), Watertown (16). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 920 numbers
Before you call back
- Debt reduction is the top named complaint here. Don't pay upfront fees for debt relief; the FTC's Telemarketing Sales Rule bans them. Talk to your lender or a nonprofit credit counselor instead. Read about debt-relief robocalls.
- Look up the full number above. A missed call from 920 with no voicemail is usually a robocall; anyone who needs you will leave a message.
- If it looks like a neighbor's number, it may be spoofed. See calls from your own area code.
- Block repeat callers: iPhone, Android, or your carrier's free filter (Verizon, AT&T, T-Mobile).
Report it in Wisconsin
- Unwanted sales calls and robocalls: donotcall.gov (FTC). Scams and fraud: ReportFraud.ftc.gov.
- Spoofing, texts and call-blocking problems: FCC consumer complaints.
- State complaints: Wisconsin Department of Agriculture, Trade and Consumer Protection.
- Wisconsin formally adopted the FTC's National Do Not Call Registry as its own state list rather than running a separate one, so a single free registration at donotcall.gov covers you. State authorities can still enforce against telemarketers who ignore it, in addition to any federal penalty.
Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.
Area code 920: questions answered from the data
Where is area code 920?
Area code 920 serves Green Bay, Appleton and Oshkosh, Wisconsin, covering Brown County, Calumet County and Winnebago County and 17 more counties. It has been in service since July 26, 1997. It was split from area code 414.
What time zone is area code 920 in?
Area code 920 is in the Central time zone (UTC−6, or UTC−5 during daylight saving time). The current local time is shown at the top of this page.
Which area codes overlay 920?
274 (in service 2023) serves the same area as 920. New numbers there can be issued with any of these codes, and local calls need all 10 digits. A spoofed call can display any of them.
What are calls from 920 numbers usually about?
Since Jul 24, consumers filed 1,920 FTC Do Not Call complaints about 920 numbers. The most common named subject was debt-relief pitches: 17% of complaints, 86% of them recorded messages. Across all subjects, 66% of callers who answered the question said the call was a robocall.
When do 920 spam calls happen?
32% of the complaints that give a call time describe calls between 10am and 1pm, and 94% came on weekdays, most often on Wednesday. Times are as consumers reported them.
Are calls from 920 numbers really local?
Not necessarily. 57% of the FTC complaints about 920 numbers came from people whose own phone number also starts with 920, and 61% from Wisconsin. Calls that look local to the person receiving them are the signature of neighbor spoofing: robocallers display a number from your own area code because you're more likely to answer.
Are 920 robocalls increasing?
In the four weeks to Oct 20, consumers filed 536 FTC complaints about 920 numbers, 19% fewer than the four weeks before.
How do I report a 920 scam call in Wisconsin?
Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. In Wisconsin, the Wisconsin Department of Agriculture, Trade and Consumer Protection also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Other Wisconsin area codes
Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.