ZIP Code 03588 — Milan, NH
03588 is a standard (street delivery) ZIP code serving Milan, 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 03588 at a glance
| ZIP code | 03588 |
|---|---|
| Primary city | Milan |
| State | New Hampshire (NH) |
| County | Coos FIPS 33007 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 1,633 |
| Coordinates | 44.605450, -71.232040 |
How ZIP+4 works in 03588
The four digits after the hyphen encode a delivery segment inside 03588. 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 03588 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 03588.
| ZIP | City | Distance |
|---|---|---|
| 03570 | Berlin, NH | 7.4 mi |
| 03582 | Groveton, NH | 10.1 mi |
| 03597 | West Stewartstown, NH | 11.6 mi |
| 04261 | Newry, ME | 15.6 mi |
| 03590 | North Stratford, NH | 16.8 mi |
| 03584 | Lancaster, NH | 17.3 mi |
| 03583 | Jefferson, NH | 17.9 mi |
| 03581 | Gorham, NH | 18.8 mi |
| 03576 | Colebrook, NH | 21.3 mi |
| 04216 | Andover, ME | 21.5 mi |
| 03593 | Randolph, NH | 21.6 mi |
| 05905 | Guildhall, VT | 22.4 mi |
Questions about 03588
What is the ZIP+4 code for 03588?
03588 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 03588, you need to look up a specific street address to get them.
What city is 03588?
03588 is assigned to Milan, 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.