ZIP Code 03443 — Chesterfield, NH
03443 is a standard (street delivery) ZIP code serving Chesterfield, New Hampshire, in Cheshire 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 03443 at a glance
| ZIP code | 03443 |
|---|---|
| Primary city | Chesterfield |
| State | New Hampshire (NH) |
| County | Cheshire FIPS 33005 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 581 |
| Coordinates | 42.876700, -72.461480 |
How ZIP+4 works in 03443
The four digits after the hyphen encode a delivery segment inside 03443. 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 03443 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 03443.
| ZIP | City | Distance |
|---|---|---|
| 03466 | West Chesterfield, NH | 2.8 mi |
| 03462 | Spofford, NH | 3.1 mi |
| 03451 | Hinsdale, NH | 5.1 mi |
| 03467 | Westmoreland, NH | 6.5 mi |
| 03441 | Ashuelot, NH | 6.9 mi |
| 03446 | Swanzey, NH | 8.4 mi |
| 05354 | Vernon, VT | 8.5 mi |
| 03470 | Winchester, NH | 9 mi |
| 05301 | Brattleboro, VT | 10.2 mi |
| 03431 | Keene, NH | 10.4 mi |
| 05346 | Putney, VT | 10.7 mi |
| 05362 | Williamsville, VT | 12.1 mi |
Questions about 03443
What is the ZIP+4 code for 03443?
03443 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 03443, you need to look up a specific street address to get them.
What city is 03443?
03443 is assigned to Chesterfield, New Hampshire, in Cheshire 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.