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Zip codes became mandatory in 1967. They were however created and put into use in 1963. Zip codes were needed as a way to help with better sorting mail.

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Q: When did zip codes become mandatory?
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Related questions

Were there ZIP codes in 1959?

No. The Zip Code as we know it was implemented in 1963, though it wasn't mandatory. Prior to that, many larger cities had postal zones that helped sort mail faster.


Can you get international zip codes?

Zip Codes are only used in the United States. There are no international zip codes.


What year zip codes started?

ZIP Code began on July 1, 1963. Use of the new code was not mandatory at first for anyone, but, in 1967, the Post Office required mailers of second- and third-class bulk mail to presort by ZIP Code.


What are used in zip codes?

Numbers are used in zip codes.


How many ZIP codes does Denver CO have?

27 zip codes


How many zip codes does the state of California have?

OK. States don't have Zip Codes. Cities have Zip Codes. You can get the complete list of ZIP codes in California under different Cities from here: http://www.zip4all.com/california/ca/ .


How many different zip codes are in America?

There are approximately 43000 zip codes. Number of ZIP codes periodically changes. For example, around 200 zip codes were added in the U.S. in 2006-2007.


Does japan have zip codes?

Yes. Japan has zip codes just like we do but their zip codes are seven numbers long as opposed to us, where we just have six digit zip codes. Below are some examples


Denmark zip codes?

For Denmark zip codes see the related link.


How many zip codes are there in the U.S?

There are approximately 43000 zip codes in the USA


How many zip codes for Long Beach CA?

33 zip codes


What is the ZIP codes of Turlock California?

The zip codes are: 95380, 95381, 95382.