ZIP Code 00971 — Guaynabo, PR
00971 is a standard (street delivery) ZIP code serving Guaynabo, Puerto Rico, in Guaynabo 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 00971 at a glance
| ZIP code | 00971 |
|---|---|
| Primary city | Guaynabo |
| State | Puerto Rico (PR) |
| County | Guaynabo FIPS 72061 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Puerto_Rico |
| Population | 24,367 |
| Coordinates | 18.320670, -66.117510 |
How ZIP+4 works in 00971
The four digits after the hyphen encode a delivery segment inside 00971. 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 00971 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 Guaynabo
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 00971.
| ZIP | City | Distance |
|---|---|---|
| 00969 | Guaynabo, PR | 3.2 mi |
| 00956 | Bayamon, PR | 3.6 mi |
| 00926 | San Juan, PR | 4.5 mi |
| 00959 | Bayamon, PR | 5.1 mi |
| 00703 | Aguas Buenas, PR | 5.1 mi |
| 00921 | San Juan, PR | 5.3 mi |
| 00966 | Guaynabo, PR | 5.3 mi |
| 00957 | Bayamon, PR | 5.6 mi |
| 00927 | San Juan, PR | 5.6 mi |
| 00968 | Guaynabo, PR | 6 mi |
| 00934 | Fort Buchanan, PR | 6.4 mi |
| 00960 | Bayamon, PR | 6.8 mi |
Questions about 00971
What is the ZIP+4 code for 00971?
00971 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 00971, you need to look up a specific street address to get them.
What city is 00971?
00971 is assigned to Guaynabo, Puerto Rico, in Guaynabo 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.