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May 012013
 
What is a ZIP +4 Code?

What are those last four numbers in a nine-digit ZIP Code?  People  call and ask for the “Full ZIP Code“, the “Last 4 Digits” of their ZIP Code, the “9 Digit ZIP Code“, the “numbers after a ZIP Code“, the “4 digit extension” and so on.  Even though they all mean the same thing, The U.S. [...]