[Answer] In what decade was the five-digit ZIP code first implemented?

Step 1 : Introduction to the question "In what decade was the five-digit ZIP code first implemented?"

...The first ZIP codes were two-digit codes used in major cities in 1943. Two decades later, in 1963, the Postal Service introduced a five-digit system nationwide.

Step 2 : Answer to the question "In what decade was the five-digit ZIP code first implemented?"

1960s:

Please let us know as comment, if the answer is not correct!

Step 3 : Disclaimer & Terms of Use regarding the question "In what decade was the five-digit ZIP code first implemented?"

Our machine learning tool trying its best to find the relevant answer to your question. Now its your turn, "The more we share The more we have". Share our work with whom you care, along with your comment ...Kindly check our comments section, Sometimes our tool may wrong but not our users.

Are We Wrong To Think We're Right? Then Give Right Answer Below As Comment