Looking for the area code for Green Bay, Wisconsin? The home of the Packers is served by area code 920, now joined by the newer 274 overlay covering the same region. This guide breaks down exactly which codes cover Green Bay and its neighborhoods, how to dial locally and internationally, the ZIP codes involved, and how to protect yourself from scam calls.
Green Bay Area Codes: Fast Facts
| Detail | Information |
|---|---|
| Primary Area Code | 920 |
| Overlay Area Code | 274 |
| Time Zone | Central Time (CT) |
| Major County | Brown County |
| Region | Northeast Wisconsin / Fox Valley |
| Country Code | +1 (USA) |
Area Code Breakdown & District Mapping
Green Bay sits at the mouth of the Fox River on the bay of Green Bay, anchoring northeastern Wisconsin and the wider Fox Valley corridor. Its numbers come from an overlay pair that shares the same geography:
- Area code 920 — serves northeastern Wisconsin and the Fox Valley, covering Green Bay and Brown County. This includes Downtown, the Astor and Allouez neighborhoods, the East and West sides, and adjoining communities such as De Pere, Ashwaubenon (home of Lambeau Field), Bellevue, and Howard.
- Area code 274 — an overlay introduced for the 920 region to add new numbers. It covers the exact same area, so a 274 number can belong to anyone in the Green Bay and Fox Valley region.
Area code 920 was created in 1997 to serve northeastern Wisconsin. As demand for numbers grew across the Fox Valley, the 274 overlay was later added over the same territory rather than splitting the region, so existing customers kept their numbers. Because 274 overlays 920, both codes serve identical communities.
Local Dialing Rules & International Calling
Because of the 274 overlay, the Green Bay area requires mandatory 10-digit dialing on every call. Always include the area code, even for local calls.
- Local / domestic: dial 920-XXX-XXXX (or 274-XXX-XXXX).
- 11-digit: you can also dial 1-920-XXX-XXXX; the leading 1 is the country code for the US.
- International: dial your country’s exit code, then +1 920 XXX XXXX — for example, 00 1 920 XXX XXXX from the UK or Europe, or +1 920 XXX XXXX from any mobile phone.
Major ZIP Codes Covered
Green Bay’s numbers align with ZIP codes across the city and Brown County, including 54301 (south/downtown), 54302 (east side), 54303 (west side), 54304 (Ashwaubenon/Lambeau area), 54311 (Bellevue/east), and 54313 (Howard/Suamico).
Spam & Scam Call Warnings for Green Bay
Scammers frequently spoof local 920 and 274 numbers so calls look like they come from a neighbor or a local business. Green Bay residents commonly report:
| Scam type | What to watch for |
|---|---|
| Government impersonation | Fake IRS or Social Security calls demanding payment |
| Utility impersonation | Threats to shut off power or gas unless you pay immediately |
| Prize & sweepstakes scams | Requests for a “processing fee” to release winnings |
| Bank & card fraud alerts | Claims of “suspicious activity” seeking account details |
To stay safe: never share personal or financial details with an unexpected caller, block suspicious numbers, and verify unfamiliar callers with a reverse phone lookup before calling back. If a call feels urgent or threatening, hang up and call back on an official number. Report unwanted calls to the FTC at reportfraud.ftc.gov and register at DoNotCall.gov.
Nearby Wisconsin Cities
Explore area codes for other Fox Valley cities: Appleton and Oshkosh. See more on our Wisconsin hub or browse all US city area-code guides.
Frequently Asked Questions
What is the area code for Green Bay?
The primary area code for Green Bay is 920, now overlaid by 274 across the same region.
What is the 274 area code in Wisconsin?
274 is an overlay area code covering the same territory as 920, including Green Bay and the Fox Valley. It was added to supply new phone numbers as 920 filled up.
What time zone is Green Bay in?
Green Bay is in the Central Time Zone (CT) and observes Daylight Saving Time.
Do I have to dial the area code in Green Bay?
Yes — because of the 920/274 overlay, 10-digit dialing is required for all calls in the Green Bay area.
Which county is Green Bay in?
Green Bay is the county seat of Brown County, which both 920 and 274 serve.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.