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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.

Zip code refers to a type of postal code and is used primarily in the United States and the Philippines. The postal code, however, is typically utilized by the rest of the countries scattered throughout the world.

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.

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.

ANSWER: The two codes are essentially the same in their purpose, but the term Zip code is mainly used in the USA; Postal Code is commonly used in other countries.

Also called ?plus-four codes?, ?add-on codes?, or ?add-ons?, the ZIP+4 code starts with the standard five-digit ZIP Code. The four extra numbers are added after a hyphen to complete the ZIP+4. So what do the extra numbers mean? These last 4 digits represent specific delivery routes within delivery areas.

But instead of trying a known ZIP code like 90210 or 02134, Canadians can convert their postal code into a 5 digit ZIP code. All you need to do is take the 3 numbers from your postal code and add ?00? to the end to get your Canadian credit card ZIP code.