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The correct format for a numeric ZIP+4 code is five digits, a hyphen, and four digits. The first five digits represent the 5-digit ZIP Code; the sixth and seventh digits (the first two after the hyphen) identify an area known as a sector; the eighth and ninth digits identify a smaller area known as a segment.

HTML input fields used for Zip Codes should be type=text and use the pattern attribute to provide hints to the browser · GitHub. Instantly share code, notes, and snippets.

If prompted for your ZIP code, just enter the three digits of your postal code plus two zeros. So for example, if your postal code is A2B 3C4, the 5-digit number you should enter is 23400.

The most complete ZIP Code is a nine-digit number consisting of five digits, a hyphen, and four digits, which the USPS describes by its trademark ZIP+4. The correct format for a numeric ZIP+4 code is five digits, a hyphen, and four digits.

HTML <form> <input id="zipcode" class="zipcode" type="text" value="" required pattern="\d{5,5}(-\d{4,4})?"> <input type="submit" text="submit"> </form>

It is preferred that all City, State, and ZIP Code information be on a single line. If that is not possible, the ZIP Code, including the ZIP+4 Code, may be placed below the city/state information.

How to Create an HTML Text Box Input Field. The default value of input 's type attribute when not specified is text. So text input is the most common style of input. The line <input type="text"> creates a single line text input field, where the user can type any text input.

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.

Current postal code range in the United States The lowest postal code area is 00001. This is the N Dillingham area in Alaska. The highest postal code area is 99950, which is also in Alaska. This area features Ketchikan.

Examples of private address unique ZIP Codes include the headquarters of Walmart (72716). An example of a PO Box-only ZIP Code is 22313, which is used for PO Boxes at the main post office in Alexandria, Virginia, such as those used by the United States Patent and Trademark Office.