ZIP Code 54173 — Suamico, WI
54173 is a standard (street delivery) ZIP code serving Suamico, Wisconsin, in Brown County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 54173 at a glance
| ZIP code | 54173 |
|---|---|
| Primary city | Suamico |
| State | Wisconsin (WI) |
| County | Brown FIPS 55009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 3,403 |
| Coordinates | 44.642280, -88.032120 |
How ZIP+4 works in 54173
The four digits after the hyphen encode a delivery segment inside 54173. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 54173 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 54173.
| ZIP | City | Distance |
|---|---|---|
| 54313 | Green Bay, WI | 5.3 mi |
| 54141 | Little Suamico, WI | 6 mi |
| 54171 | Sobieski, WI | 6.9 mi |
| 54303 | Green Bay, WI | 7.2 mi |
| 54302 | Green Bay, WI | 9.7 mi |
| 54101 | Abrams, WI | 10.1 mi |
| 54304 | Green Bay, WI | 10.4 mi |
| 54301 | Green Bay, WI | 11.1 mi |
| 54155 | Oneida, WI | 11.5 mi |
| 54229 | New Franken, WI | 11.7 mi |
| 54307 | Green Bay, WI | 11.9 mi |
| 54162 | Pulaski, WI | 12.1 mi |
Questions about 54173
What is the ZIP+4 code for 54173?
54173 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 54173, you need to look up a specific street address to get them.
What city is 54173?
54173 is assigned to Suamico, Wisconsin, in Brown County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.