when did zip codes start
ZIP Codes in the United States officially started on July 1, 1963, when the Post Office Department rolled out the nationwide five‑digit Zone Improvement Plan, or ZIP code, to speed up and automate mail sorting.
ZIP Codes in the United States officially started on July 1, 1963, when the Post Office Department rolled out the nationwide five‑digit Zone Improvement Plan, or ZIP code, to speed up and automate mail sorting.