ZIP Code 63821 — Arbyrd, MO
63821 is a standard (street delivery) ZIP code serving Arbyrd, Missouri, in Dunklin 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 63821 at a glance
| ZIP code | 63821 |
|---|---|
| Primary city | Arbyrd |
| State | Missouri (MO) |
| County | Dunklin FIPS 29069 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 616 |
| Coordinates | 36.048780, -90.239630 |
How ZIP+4 works in 63821
The four digits after the hyphen encode a delivery segment inside 63821. 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 63821 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 63821.
| ZIP | City | Distance |
|---|---|---|
| 63829 | Cardwell, MO | 4.1 mi |
| 63876 | Senath, MO | 7.1 mi |
| 72438 | Leachville, AR | 7.3 mi |
| 63855 | Hornersville, MO | 9.4 mi |
| 72447 | Monette, AR | 10.9 mi |
| 72443 | Marmaduke, AR | 13.2 mi |
| 63849 | Gobler, MO | 15 mi |
| 72461 | Rector, AR | 15.2 mi |
| 72450 | Paragould, AR | 15.6 mi |
| 72442 | Manila, AR | 15.8 mi |
| 63857 | Kennett, MO | 16.2 mi |
| 72414 | Black Oak, AR | 17.2 mi |
Questions about 63821
What is the ZIP+4 code for 63821?
63821 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 63821, you need to look up a specific street address to get them.
What city is 63821?
63821 is assigned to Arbyrd, Missouri, in Dunklin 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.