- is a ZIP Code 5 Plus 4 number of , , . Below is detail information. ZIP Code 5 Plus 4 ZIP Code 5 Plus 4: - ZIP Code 5: Plus 4?: 4-digits that are used to identify a geographic segment within the 5-digit delivery area, such as a city block or a group of apartments or an individual high-volume receiver of mail, or any other unit that could use an extra identifier to aid in efficient mail sorting and delivery. Mailers should not match an address identified as a nondelivery area.If you absolutely must have numeric characters in the Plus4Code column, you may treat "ND" values as "00". Click here to close field explain Country: U.S. - United States State: County: CountyFIPS: City: Address Address Example - UNITED STATES OF AMERICA More Information Help: What do the all fields mean? , , - next › , , test, USA Buy: All ZIP Code Database @ United States ZIP Code 5 Plus 4 Database Supermarket