ZIP Code 03874 — Seabrook, NH
03874 is a standard (street delivery) ZIP code serving Seabrook, New Hampshire, in Rockingham 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 03874 at a glance
| ZIP code | 03874 |
|---|---|
| Primary city | Seabrook |
| State | New Hampshire (NH) |
| County | Rockingham FIPS 33015 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 8,487 |
| Coordinates | 42.886890, -70.860700 |
How ZIP+4 works in 03874
The four digits after the hyphen encode a delivery segment inside 03874. 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 03874 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 03874.
| ZIP | City | Distance |
|---|---|---|
| 01952 | Salisbury, MA | 2.8 mi |
| 03844 | Hampton Falls, NH | 3 mi |
| 03842 | Hampton, NH | 3.8 mi |
| 01913 | Amesbury, MA | 4.8 mi |
| 01950 | Newburyport, MA | 5.3 mi |
| 03862 | North Hampton, NH | 6.5 mi |
| 03827 | East Kingston, NH | 6.6 mi |
| 01951 | Newbury, MA | 7.6 mi |
| 03871 | Rye Beach, NH | 7.8 mi |
| 01860 | Merrimac, MA | 8.3 mi |
| 01985 | West Newbury, MA | 8.4 mi |
| 03833 | Exeter, NH | 8.9 mi |
Questions about 03874
What is the ZIP+4 code for 03874?
03874 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 03874, you need to look up a specific street address to get them.
What city is 03874?
03874 is assigned to Seabrook, New Hampshire, in Rockingham 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.