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In 1983, the zip + 4 format we now use (e.g., 60601-1635) was introduced to support delivery to densely populated areas. The first three digits before the hyphen identify the sectional center or large city. The second two classify the post office facility or delivery area.

How to Create Map from Zip Codes Using Mapize Zip Code Map Maker Copy all your data from the spreadsheet, and paste it into Mapize's map-making tool in the location data box to the right. Or, save your sheet as a CSV file and upload it in the ?Drag and Drop? section on the left. ... Click ?Create Map.?

Place the recipient's name on the first line. On the second line, write the building number and street name. Include the city, state and ZIP code on the final line.

To insert a dash between letters and numbers in Excel, use the following steps: Select the cell or range of cells where you want to insert the dashes. Click the Home tab. In the Font group, click the Insert drop-down arrow. Click Special Characters. ... In the Symbol tab, select the character you want to insert.

United States ZIP codes are five numerical digits long. ZIP+4 codes, also known as add-on or plus-four codes, include four additional digits that identify a geographic segment within a ZIP code delivery area. The first digit in a ZIP code represents a defined group of U.S. states.

So what do the extra numbers mean? These last 4 digits represent specific delivery routes within delivery areas. This extra detail means an even more precise matching to a more granular level. It could represent a handful of houses on one side of a street, or even a single building that receives a high volume of mail.

A United States postal code, for example, might be either five digits or five digits followed a hyphen (dash) and another four digits (12345-1234). If you are validating US postal codes, allow for both conditions.