Zip code boundaries in Mecklenburg County NC. A ZIP Code (an acronym for Zone Improvement Plan) is a system of postal codes used by the United States Postal Service (USPS). The term ZIP was chosen to suggest that the mail travels more efficiently and quickly when senders use the code in the postal address.Introduced on July 1, 1963, the basic format comprised five digits. In 1983, an extended code was introduced named ZIP+4 ; it included the five digits of the ZIP Code, followed by a hyphen and four digits that designated a more specific location.

US Postal Service ZIP Code boundaries in Wake County, NC. This dataset is updated as needed when property lines change and when source data from the US Postal Service is updated, and it is maintained by the Wake County GIS Addressing Team. GIS metadata is available here.