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=head1 DESCRIPTION

The API service  is provided by L<website|http://getpincodes.info/apidetail.php>.

A Postal Index Number or PIN or Pincode is the post office numbering or post code
system used by India Post, the Indian postal administration. The code is 6 digits
long. The PIN was introduced on 15 August 1972.

There are nine PIN zones in India,including eight regional zones & one functional
zone  (Indian Army). The  first  digit  of the PIN code indicates the region. The
second digit indicates the sub-region, and  the third digit indicates the sorting
district within the region.The final three digits are assigned to individual post
offices.

    +-------------------------+-------------------------------------------------+
    | First 2/3 Digits of PIN | Postal Circle                                   |
    +-------------------------+-------------------------------------------------+
    | 11                      | Delhi                                           |
    | 12 and 13               | Haryana                                         |
    | 14 to 15                | Punjab                                          |
    | 16                      | Chandigarh                                      |