ZIP Code 99573 — Copper Center, AK
99573 is a standard (street delivery) ZIP code serving Copper Center, Alaska, in Copper River 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 99573 at a glance
| ZIP code | 99573 |
|---|---|
| Primary city | Copper Center |
| State | Alaska (AK) |
| County | Copper River FIPS 02066 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Anchorage |
| Population | 941 |
| Coordinates | 61.600360, -145.924460 |
How ZIP+4 works in 99573
The four digits after the hyphen encode a delivery segment inside 99573. 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 99573 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.
Questions about 99573
What is the ZIP+4 code for 99573?
99573 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 99573, you need to look up a specific street address to get them.
What city is 99573?
99573 is assigned to Copper Center, Alaska, in Copper River 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.
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