ZIP Code 03753 — Grantham, NH
03753 is a standard (street delivery) ZIP code serving Grantham, New Hampshire, in Sullivan 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 03753 at a glance
| ZIP code | 03753 |
|---|---|
| Primary city | Grantham |
| State | New Hampshire (NH) |
| County | Sullivan FIPS 33019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 3,509 |
| Coordinates | 43.515340, -72.147980 |
How ZIP+4 works in 03753
The four digits after the hyphen encode a delivery segment inside 03753. 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 03753 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 03753.
| ZIP | City | Distance |
|---|---|---|
| 03751 | Georges Mills, NH | 5.9 mi |
| 03770 | Meriden, NH | 6 mi |
| 03284 | Springfield, NH | 6.1 mi |
| 03748 | Enfield, NH | 6.2 mi |
| 03781 | Plainfield, NH | 7.3 mi |
| 03782 | Sunapee, NH | 9.1 mi |
| 03745 | Cornish, NH | 9.1 mi |
| 03766 | Lebanon, NH | 9.4 mi |
| 03773 | Newport, NH | 9.4 mi |
| 03240 | Grafton, NH | 9.7 mi |
| 03257 | New London, NH | 10.3 mi |
| 03784 | West Lebanon, NH | 11.5 mi |
Questions about 03753
What is the ZIP+4 code for 03753?
03753 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 03753, you need to look up a specific street address to get them.
What city is 03753?
03753 is assigned to Grantham, New Hampshire, in Sullivan 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.