ZIP Code 01845 — North Andover, MA
01845 is a standard (street delivery) ZIP code serving North Andover, Massachusetts, in Essex 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 01845 at a glance
| ZIP code | 01845 |
|---|---|
| Primary city | North Andover |
| State | Massachusetts (MA) |
| County | Essex FIPS 25009 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 32,494 |
| Coordinates | 42.671320, -71.086690 |
How ZIP+4 works in 01845
The four digits after the hyphen encode a delivery segment inside 01845. 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 01845 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 01845.
| ZIP | City | Distance |
|---|---|---|
| 01921 | Boxford, MA | 3.5 mi |
| 01843 | Lawrence, MA | 4 mi |
| 01810 | Andover, MA | 4.3 mi |
| 01840 | Lawrence, MA | 4.5 mi |
| 01841 | Lawrence, MA | 4.8 mi |
| 01835 | Haverhill, MA | 5.6 mi |
| 01949 | Middleton, MA | 5.8 mi |
| 01864 | North Reading, MA | 6.2 mi |
| 01833 | Georgetown, MA | 6.4 mi |
| 01834 | Groveland, MA | 6.7 mi |
| 01844 | Methuen, MA | 6.8 mi |
| 01983 | Topsfield, MA | 7.7 mi |
Questions about 01845
What is the ZIP+4 code for 01845?
01845 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 01845, you need to look up a specific street address to get them.
What city is 01845?
01845 is assigned to North Andover, Massachusetts, in Essex 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.