ZIP Code 02564 — Siasconset, MA
02564 is a standard (street delivery) ZIP code serving Siasconset, Massachusetts, in Nantucket 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 02564 at a glance
| ZIP code | 02564 |
|---|---|
| Primary city | Siasconset |
| State | Massachusetts (MA) |
| County | Nantucket FIPS 25019 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 255 |
| Coordinates | 41.265520, -69.986080 |
How ZIP+4 works in 02564
The four digits after the hyphen encode a delivery segment inside 02564. 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 02564 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 02564.
| ZIP | City | Distance |
|---|---|---|
| 02584 | Nantucket, MA | 1.1 mi |
| 02554 | Nantucket, MA | 5.1 mi |
| 02646 | Harwich Port, MA | 28.3 mi |
| 02671 | West Harwich, MA | 28.6 mi |
| 02639 | Dennis Port, MA | 28.7 mi |
| 02659 | South Chatham, MA | 28.8 mi |
| 02670 | West Dennis, MA | 28.9 mi |
| 02633 | Chatham, MA | 29.3 mi |
| 02539 | Edgartown, MA | 29.4 mi |
| 02673 | West Yarmouth, MA | 30.1 mi |
| 02664 | South Yarmouth, MA | 30.2 mi |
| 02650 | North Chatham, MA | 30.2 mi |
Questions about 02564
What is the ZIP+4 code for 02564?
02564 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 02564, you need to look up a specific street address to get them.
What city is 02564?
02564 is assigned to Siasconset, Massachusetts, in Nantucket 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.