ZIP Code 00638 — Ciales, PR
00638 is a standard (street delivery) ZIP code serving Ciales, Puerto Rico, in Ciales 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 00638 at a glance
| ZIP code | 00638 |
|---|---|
| Primary city | Ciales |
| State | Puerto Rico (PR) |
| County | Ciales FIPS 72039 |
| ZIP type | Standard (street delivery) |
| Time zone | America/Puerto_Rico |
| Population | 17,319 |
| Coordinates | 18.284620, -66.513700 |
How ZIP+4 works in 00638
The four digits after the hyphen encode a delivery segment inside 00638. 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 00638 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 00638.
| ZIP | City | Distance |
|---|---|---|
| 00650 | Florida, PR | 6.2 mi |
| 00687 | Morovis, PR | 6.5 mi |
| 00664 | Jayuya, PR | 7.2 mi |
| 00720 | Orocovis, PR | 7.6 mi |
| 00674 | Manati, PR | 9.6 mi |
| 00688 | Sabana Hoyos, PR | 9.9 mi |
| 00766 | Villalba, PR | 10.9 mi |
| 00617 | Barceloneta, PR | 11.5 mi |
| 00783 | Corozal, PR | 12.2 mi |
| 00693 | Vega Baja, PR | 12.4 mi |
| 00641 | Utuado, PR | 12.4 mi |
| 00652 | Garrochales, PR | 13.2 mi |
Questions about 00638
What is the ZIP+4 code for 00638?
00638 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 00638, you need to look up a specific street address to get them.
What city is 00638?
00638 is assigned to Ciales, Puerto Rico, in Ciales 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?
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