Input Zip Code Document For Free - Zip Document

Most of the postal code systems are numeric; only a few are alphanumeric (i.e., use both letters and digits). Alphanumeric systems can, given the same number of characters, encode many more locations.

Zip codes are always 5 characters, hence you would need a CHAR datatype, rather than VARCHAR. The first takes 5 bytes per zip code.

First digit reflects region in India, second the sub-region, third the sorting district, and last three represent the post office code. Thus the first 3 digits collectively indicates the postal district while the last 3 digits designates the specific post office within the district.

The term Postal Index Number (PIN) is popularly known as PIN Code/Postal Code in India. It is a code in the post office number of the postal code system which is used in India Post for segregating the mails. The PIN code consists of six digits.

When it comes to USA zip codes, they are always 5 digits long. However, sometimes these codes may also include leading zeros. If you store these zip codes as integers, any leading zeros would be stripped, resulting in missing data. As such, it's usually better to store zip codes as 5 character strings.

If you want to improve the chances that the letter will make it to its destination quickly, you should use the five-digit ZIP code plus the four additional numbers that are specific to the area. To format, write the ZIP code with a hyphen afterward and then the four additional numbers will immediately follow that.

Since all postal codes are not numbers-only like US zip codes, use input type="text" and set the pattern attribute to enable the numbers keyboard. Include autocomplete="postal-code" . This example is for US zip code entry of 5 digits, 0-9.