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India has no 5 digit zipcode India has the 6 digit postal code. India does not have zip code, in India we have Postal Index Code i.e. PIN code.

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.

Zoning Improvement Plan (ZIP) codes were implemented in 1963. The five-digit system used the first number to point to a national area, the next two numbers to pinpoint a population centre or large city, and the final two numbers to designate a specific delivery area.

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. After the hyphen, the first two digits indicate the sector or group of blocks, and the last two identify the segment or one side of a street.

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.

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. The following rule validates a field that can be five digits, five digits + dash + 4 digits, or blank.

A ZIP Code is a system of postal codes used by the United States Postal Service (USPS). Introduced on July 1, 1963, the basic format consisted of five digits.