<P> Postal Codes were introduced in Pakistan on 1 January 1988 to speed sortation and delivery . These codes are for the delivery post office in whose jurisdiction the address falls . For example, for the entire Defence Housing Authority (DHA) area (all 8 phases), Karachi, the delivery code is 75500 . This code is not meant for the main DHA including post office's attached branch office . That code is + 1 i.e. for DHA, the code is 75501 . Another example is Lawrence College PostOffice, whose delivery code is 47114 . In that case, its attached branch office of + 1 is 47115 . </P> <P> Moreover, Azad Kashmir has also been post coded to Pakistani standards, but post code sequence 00010 to 12991 has been deliberately left blank pending a final resolution of Kashmir issue . </P> <P> Pakistan Post office is one of the oldest government departments in the South Asia . In 1947, it began functioning as the Department of Post and Telegraph . In 1962 it was separated from the Telegraph & Telephone and started working as an independent . </P>

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