What do the numbers in the zip code mean?
The post office can deliver mail more quickly because of the zip code. There is a five-number zip code for every address.
Here’s how it works. The United States and its possessions are divided up into 10 large parts. Each part has a number between 0 and 9.
Suppose the zip code on the letter you mail is 60635. The first number, “6”, tells the postal clerk that the letter goes to the Midwest part of the United States. The next two numbers, “06” narrows it down to Chicago, III. The last two numbers, “15.” pinpoint the local post office.
Zip-coded letters eliminate many handlings. Before ZIP the letter would have gone through many sorting as it was passed from one large city to another across the country.
By reading the zip code numbers, post office workers can only can route the letters more directly to their destination, but sort them more quickly at home. Always use your zip number on your mail.-Dick Rogers