The group of addresses to which the 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...1/17/2017
DefinitionThe group of addresses to which the 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.
