from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A postal code, especially for addresses served by the US Postal Service, consisting of a five- or nine-figure number.
- n. A region within which all addresses share a certain five-digit postal code.
from Zone Improvement Plan (Wiktionary)
Every person must have and know his/her Social Security number and the U.S. Postal ZIP code at which the person was residing prior to this emergency.