ZIP Code 06403 — Beacon Falls, CT
06403 is a standard (street delivery) ZIP code serving Beacon Falls, Connecticut, in Naugatuck Valley 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 06403 at a glance
| ZIP code | 06403 |
|---|---|
| Primary city | Beacon Falls |
| State | Connecticut (CT) |
| County | Naugatuck Valley FIPS 09140 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 6,147 |
| Coordinates | 41.439020, -73.056790 |
How ZIP+4 works in 06403
The four digits after the hyphen encode a delivery segment inside 06403. 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 06403 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 06403.
| ZIP | City | Distance |
|---|---|---|
| 06524 | Bethany, CT | 3.4 mi |
| 06770 | Naugatuck, CT | 3.5 mi |
| 06478 | Oxford, CT | 4.1 mi |
| 06483 | Seymour, CT | 4.3 mi |
| 06712 | Prospect, CT | 5.9 mi |
| 06525 | Woodbridge, CT | 6.2 mi |
| 06401 | Ansonia, CT | 6.6 mi |
| 06706 | Waterbury, CT | 6.7 mi |
| 06762 | Middlebury, CT | 7 mi |
| 06514 | Hamden, CT | 7.5 mi |
| 06518 | Hamden, CT | 7.5 mi |
| 06708 | Waterbury, CT | 7.6 mi |
Questions about 06403
What is the ZIP+4 code for 06403?
06403 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 06403, you need to look up a specific street address to get them.
What city is 06403?
06403 is assigned to Beacon Falls, Connecticut, in Naugatuck Valley 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.