ZIP Code 73664 — Sentinel, OK
73664 is a standard (street delivery) ZIP code serving Sentinel, Oklahoma, in Washita 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 73664 at a glance
| ZIP code | 73664 |
|---|---|
| Primary city | Sentinel |
| State | Oklahoma (OK) |
| County | Washita FIPS 40149 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Chicago |
| Population | 1,137 |
| Coordinates | 35.174750, -99.236900 |
How ZIP+4 works in 73664
The four digits after the hyphen encode a delivery segment inside 73664. 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 73664 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 73664.
| ZIP | City | Distance |
|---|---|---|
| 73641 | Dill City, OK | 6.8 mi |
| 73627 | Carter, OK | 12.3 mi |
| 73661 | Rocky, OK | 12.4 mi |
| 73655 | Lone Wolf, OK | 13.3 mi |
| 73624 | Burns Flat, OK | 13.3 mi |
| 73651 | Hobart, OK | 14 mi |
| 73547 | Granite, OK | 16.1 mi |
| 73626 | Canute, OK | 18.4 mi |
| 73644 | Elk City, OK | 19.1 mi |
| 73647 | Foss, OK | 19.3 mi |
| 73632 | Cordell, OK | 19.7 mi |
| 73622 | Bessie, OK | 20.3 mi |
Questions about 73664
What is the ZIP+4 code for 73664?
73664 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 73664, you need to look up a specific street address to get them.
What city is 73664?
73664 is assigned to Sentinel, Oklahoma, in Washita 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.