When did the united states start using zip codes?
By the early 1960s, a more organized system was needed, and non-mandatory five-digit ZIP Codes were introduced nationwide on July 1, 1963. The USPOD issued its "Publication 59: Abbreviations for Use with ZIP Code" on October 1, 1963, with the list of two-letter state abbreviations which are generally written with both letters capitalized. An earlier list in June had proposed capitalized abbreviations ranging from two to five letters. According to "Publication 59", the two-letter standard was "based on a maximum 23-position line, because this has been found to be the most universally acceptable line capacity basis for major addressing systems", which would be exceeded by a long city name combined with a multi-letter state abbreviation, such as "Sacramento, Calif." along with the ZIP Code. The abbreviations have remained unchanged, with the exception of Nebraska, which was changed from NB to NE in 1969 at the request of the Canadian postal administration, to avoid confusion with the Canadian province of New Brunswick.
When did the United States introduce zip codes?
July 1, 1963
ZIP Code
No context provided
When did the United States start requiring zip codes?
1967
ZIP Code
https://en.wikipedia.org/wiki/ZIP%20Code
The term ZIP is an acronym for Zone Improvement Plan;[1] it was chosen to suggest that the mail travels more efficiently and quickly[2] (zipping along) when senders use the code in the postal address. The term ZIP Code was originally registered as a service mark by the USPS; its registration expired in 1997.[3]
ZIP Code
The United States first introduced zip codes on July 1, 1963, and by 1967 the zip code was required. The term ZIP is an acronym for Zone Improvement Plan, and was was chosen to suggest that the mail travels more efficiently and quickly when senders use the code in the postal address. 