ZIP+4


Also found in: Acronyms.

ZIP+4

A more specific type of ZIP code used to identify a smaller area, such as an apartment building, a city block or even an individual post office box. The ZIP+4 was introduced in 1983.
References in periodicals archive ?
Adding a window to the envelope/folder allows for a personalized letter and facilitates postal savings and expedition through ZIP+4 barcoding and postal presort.
Mailer's LookUp will be updated semiannually to keep the address and ZIP+4 data current.
use off-the-shelf software for ZIP correction, address standardization and ZIP+4 coding.
Once this process is complete, addresses that were appended with ZIP+4 codes are now deliverable.
Other vital information on the file includes carrier routes, delivery sequence numbers, ZIP+4 codes, vacancy codes, delivery type codes and seasonal codes.
Area-level (ZIP code) data can be based on the five-digit ZIP code or smaller areas like ZIP+4, census tract or block group.