ZIP Code 62443 — Mason, IL
62443 is a standard (street delivery) ZIP code serving Mason, Illinois, in Effingham 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 62443 at a glance
| ZIP code | 62443 |
|---|---|
| Primary city | Mason |
| State | Illinois (IL) |
| County | Effingham FIPS 17049 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,609 |
| Coordinates | 38.953970, -88.629020 |
How ZIP+4 works in 62443
The four digits after the hyphen encode a delivery segment inside 62443. 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 62443 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 62443.
| ZIP | City | Distance |
|---|---|---|
| 62426 | Edgewood, IL | 4.2 mi |
| 62473 | Watson, IL | 5.7 mi |
| 62838 | Farina, IL | 8.7 mi |
| 62411 | Altamont, IL | 9.6 mi |
| 62424 | Dieterich, IL | 11.4 mi |
| 62401 | Effingham, IL | 11.9 mi |
| 62858 | Louisville, IL | 12.2 mi |
| 62458 | Saint Elmo, IL | 13.1 mi |
| 62880 | Saint Peter, IL | 15 mi |
| 62467 | Teutopolis, IL | 15.9 mi |
| 62854 | Kinmundy, IL | 16.3 mi |
| 62461 | Shumway, IL | 17.2 mi |
Questions about 62443
What is the ZIP+4 code for 62443?
62443 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 62443, you need to look up a specific street address to get them.
What city is 62443?
62443 is assigned to Mason, Illinois, in Effingham 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.