ZIP Code 49903 — Amasa, MI
49903 is a standard (street delivery) ZIP code serving Amasa, Michigan, in Iron 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 49903 at a glance
| ZIP code | 49903 |
|---|---|
| Primary city | Amasa |
| State | Michigan (MI) |
| County | Iron FIPS 26071 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Menominee |
| Population | 233 |
| Coordinates | 46.334550, -88.484960 |
How ZIP+4 works in 49903
The four digits after the hyphen encode a delivery segment inside 49903. 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 49903 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 49903.
| ZIP | City | Distance |
|---|---|---|
| 49919 | Covington, MI | 12.3 mi |
| 49970 | Watton, MI | 14.9 mi |
| 49935 | Iron River, MI | 15.7 mi |
| 49920 | Crystal Falls, MI | 16 mi |
| 49961 | Sidnaw, MI | 17.1 mi |
| 49879 | Republic, MI | 19.1 mi |
| 49915 | Caspian, MI | 19.8 mi |
| 49927 | Gaastra, MI | 20.4 mi |
| 49902 | Alpha, MI | 20.4 mi |
| 49861 | Michigamme, MI | 22.7 mi |
| 49967 | Trout Creek, MI | 25 mi |
| 49815 | Channing, MI | 27.1 mi |
Questions about 49903
What is the ZIP+4 code for 49903?
49903 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 49903, you need to look up a specific street address to get them.
What city is 49903?
49903 is assigned to Amasa, Michigan, in Iron 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.