ZIP Code 03584 — Lancaster, NH
03584 is a standard (street delivery) ZIP code serving Lancaster, New Hampshire, in Coos 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 03584 at a glance
| ZIP code | 03584 |
|---|---|
| Primary city | Lancaster |
| State | New Hampshire (NH) |
| County | Coos FIPS 33007 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,501 |
| Coordinates | 44.486960, -71.542780 |
How ZIP+4 works in 03584
The four digits after the hyphen encode a delivery segment inside 03584. 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 03584 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 03584.
| ZIP | City | Distance |
|---|---|---|
| 03583 | Jefferson, NH | 7.2 mi |
| 05906 | Lunenburg, VT | 8.5 mi |
| 03598 | Whitefield, NH | 8.6 mi |
| 03582 | Groveton, NH | 9.2 mi |
| 05904 | Gilman, VT | 9.5 mi |
| 03595 | Twin Mountain, NH | 12.5 mi |
| 05840 | Granby, VT | 12.7 mi |
| 05858 | North Concord, VT | 13.3 mi |
| 03575 | Bretton Woods, NH | 15 mi |
| 05905 | Guildhall, VT | 16 mi |
| 05824 | Concord, VT | 16.2 mi |
| 03574 | Bethlehem, NH | 16.3 mi |
Questions about 03584
What is the ZIP+4 code for 03584?
03584 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 03584, you need to look up a specific street address to get them.
What city is 03584?
03584 is assigned to Lancaster, New Hampshire, in Coos 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.