US States Zip Directory 2026

Browse Zip Codes by State




Currently We have more than 42735 Records of US States Zip Codes from all over the United States!

Details of 00957 Zip Code



Detail Info for 00957 Zip Code U.S Zip Info
Zip Code : 00957
Type : STANDARD
City : Bayamon
State : PR
County : Bayamon Municipio
Acceptable Cities:
UnAcceptable Cities: Alt De Cana, Alt De Sans Souci, Bda Calderon, Bo Los Angeles, Colinas De Bayoan, Est De Cerro Gordo, Ext Rexville, Parc Van Scoy, Urb Alhambra, Urb Bayamon Gdns, Urb Bella Vista, Urb Cana, Urb Flamingo Hls, Urb Flamingo Ter, Urb Los Dominicos, Urb May Fair, Urb Miraflores, Urb Montanez, Urb Panorama, Urb Panorama Estates, Urb Panorama Vlg, Urb Patio De Rexville, Urb Rexville, Urb Royal Gdns, Urb San Fernando, Urb Sans Souci, Urb Santa Catalina, Urb Santa Elena, Urb Santa Elenita, Urb Santa Monica, Urb Sierra Linda, Valle De Cerro Gordo, Villa Arrieta, Vista Alta
Time Zone : America/Puerto_Rico
Area Codes : 787, 939
Latitute : 18,37
Longitude : -66,19
 US ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a region (0-9), the next two signify a sectional center facility, and the last two pinpoint a local post office. A 4-digit extension ("+4") is often used for specific delivery routes.
Key Details About US ZIP Codes
Structure: 5 digits (e.g., 90210) or ZIP+4 (e.g., 90210-1234).
Purpose: The Zone Improvement Plan (ZIP) system allows the USPS to automatically route mail more efficiently.
Geographic Breakdown:
1st Digit: Represents a group of states (e.g., 0=Northeast, 9=West).
2nd/3rd Digits: Represent a regional area or large city.
4th/5th Digits: Identify specific post offices or delivery areas.
Ranges by State: For example, California is 900-961, while New York is 005 and 100-149.
Usage: They are essential for accurate mail delivery, navigation, and location-based services.

Map of 00957


ZIP codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP, an acronym for Zone Improvement Plan, is properly written in capital letters and was chosen to suggest that the mail travels more efficiently, and therefore more quickly, when senders use the code in the postal address. The basic format consists of five decimal numerical digits. An extended ZIP+4 code, introduced in the 1980s, includes the five digits of the ZIP code, a hyphen, and four more digits that determine a more precise location than the ZIP code alone. The term ZIP code was originally registered as a servicemark (a type of trademark) by the U.S. Postal Service, but its registration has since expired.


ZIP codes designate only delivery points within the United States and its dependencies, as well as locations of its armed forces. There are no ZIP codes reserved for designating mail bound for foreign destinations (with the exception of U.S. military units stationed outside of the United States), and therefore, international outbound mail should not include a ZIP code in the delivery address. The last line of a foreign address must only show the name of the country of destination.