ZIP Code 86003 — Flagstaff, AZ
86003 is a standard (street delivery) ZIP code serving Flagstaff, Arizona, in Coconino 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 86003 at a glance
| ZIP code | 86003 |
|---|---|
| Primary city | Flagstaff |
| State | Arizona (AZ) |
| County | Coconino FIPS 04005 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Denver |
| Population | 104 |
| Coordinates | 35.242590, -111.202020 |
How ZIP+4 works in 86003
The four digits after the hyphen encode a delivery segment inside 86003. 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 86003 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 Flagstaff
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 86003.
| ZIP | City | Distance |
|---|---|---|
| 86004 | Flagstaff, AZ | 13.4 mi |
| 86035 | Leuppx, AZ | 14.4 mi |
| 86011 | Flagstaff, AZ | 25.8 mi |
| 86005 | Flagstaff, AZ | 26.5 mi |
| 86038 | Mormon Lake, AZ | 28.6 mi |
| 86047 | Winslow, AZ | 32.1 mi |
| 86001 | Flagstaff, AZ | 32.1 mi |
| 86017 | Munds Park, AZ | 34.1 mi |
| 86351 | Sedona, AZ | 45.9 mi |
Questions about 86003
What is the ZIP+4 code for 86003?
86003 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 86003, you need to look up a specific street address to get them.
What city is 86003?
86003 is assigned to Flagstaff, Arizona, in Coconino 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.