The group of addresses to which the United States Postal Service (USPS) assigns the same code to aid in mail delivery. For the USPS, these codes are 9 digits: 5 numbers for the ZIP Code, one letter...1/21/2016
DefinitionThe group of addresses to which the United States Postal Service (USPS) assigns the same code to aid in mail delivery. For the USPS, these codes are 9 digits: 5 numbers for the ZIP Code, one letter for the carrier route type and 3 numbers for the carrier route number.
