ZIP Code 01129 — Springfield, MA
01129 is a standard (street delivery) ZIP code serving Springfield, Massachusetts, in Hampden 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 01129 at a glance
| ZIP code | 01129 |
|---|---|
| Primary city | Springfield |
| State | Massachusetts (MA) |
| County | Hampden FIPS 25013 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 5,672 |
| Coordinates | 42.121100, -72.487700 |
How ZIP+4 works in 01129
The four digits after the hyphen encode a delivery segment inside 01129. 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 01129 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.
Other ZIP codes in Springfield
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 01129.
| ZIP | City | Distance |
|---|---|---|
| 01119 | Springfield, MA | 1.2 mi |
| 01128 | Springfield, MA | 1.8 mi |
| 01151 | Indian Orchard, MA | 2.4 mi |
| 01118 | Springfield, MA | 2.6 mi |
| 01095 | Wilbraham, MA | 3 mi |
| 01109 | Springfield, MA | 3.1 mi |
| 01104 | Springfield, MA | 4.2 mi |
| 01028 | East Longmeadow, MA | 4.3 mi |
| 01108 | Springfield, MA | 4.5 mi |
| 01105 | Springfield, MA | 4.9 mi |
| 01056 | Ludlow, MA | 5.1 mi |
| 01144 | Springfield, MA | 5.4 mi |
Questions about 01129
What is the ZIP+4 code for 01129?
01129 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 01129, you need to look up a specific street address to get them.
What city is 01129?
01129 is assigned to Springfield, Massachusetts, in Hampden 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.