answersLogoWhite

0


Best Answer

It isn't. USPS Domestic Mail Manual 602 1.4:

ZIP Codes are required on Express Mail, Presorted and automation price First-Class Mail, Periodicals mail, Standard Mail, Package Services mail (except single-piece price Parcel Post), all mail sent to military addresses within the United States and to APO and FPO addresses, all official mail (penalty mail), all business reply mail, and all merchandise return service mail.

nless required above, ZIP Codes may be omitted from single-piece price First-Class Mail (including Priority Mail), single-piece price Parcel Post, and pieces bearing a simplified address.

User Avatar

Wiki User

13y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

12y ago

ZIP Codes began on July 1, 1963 (from a 2 digit to a 5 digit code).

This answer is:
User Avatar

User Avatar

Wiki User

11y ago

1972

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: When did zip codes go into effect?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What are some of Jacksonville's zip codes?

For a complete list of Jacksonville's zip-codes go to 555AK.com. Posting all of Jacksonville's zip-codes here on WikiAnswers is impossible, because Jacksonville is such a big city and has numerous zip codes.


Were can you find a list of zip codes by state?

Go to the Post Office web address. USPS.com. Zip codes are listed there.


Can you get international zip codes?

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


What is the actual zip code of Houston Texas?

Houston, Texas is a very large city, therefore there are around 178 zip codes. These zip codes go in numeric order from 77001-77299.


Is there a US postal zip codes history website?

There a few places that you can go to get more information on the history of zip codes in the US. First and the I am sure you know this is Wikipedia. Also if you go to the USPS website there is a history of the postal service so you will probably get some information on zip codes there.


What is Lockport Illinois' zip code?

There are 3 zip codes but I don't know which one you want. Go to the USPS site and click on Lookup Zip Codes (see Related Links).


What are used in zip codes?

Numbers are used in zip codes.


Can you have a list of zip codes in delaware?

Zip codes help someone to locate the correct location. This means that Delaware alone has many. Luckily, all the zip codes in one state tend to start with the first few letters. In Delaware, the codes go from 19701-19980.


What are some zip codes in Georgia?

go to www.50states.com/cityguides/ this should find any city zip there is!


Where can a person go to look up zip codes?

There are all kinds of different companies that will allow someone to look up zip codes. Some of these companies are; YellowPages, Redelivery, and USPS. Another place that someone can go to look up zip codes is the local library, and/or the local post office.


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/ .