List of cities from ARROYO's county

ARROYO	EXT JARD DE ARROYO
JARD DE ARROYO	JARD DE LAFAYETTE
QTAS DE GUASIMA	REPTO BELLO MAR
URB ARROYO DEL MAR	URB BELINDA
URB LAS 500	URB PALMAR 2
URB SAN ANTONIO	VILLAS DE LAFAYETTE

What is ZIP Code?

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,[1] 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