ZIP Code 01243 — Middlefield, MA
01243 is a standard (street delivery) ZIP code serving Middlefield, Massachusetts, in Hampshire 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 01243 at a glance
| ZIP code | 01243 |
|---|---|
| Primary city | Middlefield |
| State | Massachusetts (MA) |
| County | Hampshire FIPS 25015 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 173 |
| Coordinates | 42.347520, -73.034670 |
How ZIP+4 works in 01243
The four digits after the hyphen encode a delivery segment inside 01243. 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 01243 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 01243.
| ZIP | City | Distance |
|---|---|---|
| 01223 | Becket, MA | 4.1 mi |
| 01011 | Chester, MA | 4.7 mi |
| 01098 | Worthington, MA | 5.7 mi |
| 01235 | Hinsdale, MA | 6.1 mi |
| 01084 | West Chesterfield, MA | 8.2 mi |
| 01050 | Huntington, MA | 9 mi |
| 01012 | Chesterfield, MA | 9.9 mi |
| 01026 | Cummington, MA | 10.1 mi |
| 01238 | Lee, MA | 10.3 mi |
| 01253 | Otis, MA | 10.4 mi |
| 01029 | East Otis, MA | 10.6 mi |
| 01226 | Dalton, MA | 10.9 mi |
Questions about 01243
What is the ZIP+4 code for 01243?
01243 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 01243, you need to look up a specific street address to get them.
What city is 01243?
01243 is assigned to Middlefield, Massachusetts, in Hampshire 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.