in
Madhya Pradesh.
4 indicates the
West postal zone,
5 indicates
a postal sub-zone in Madhya Pradesh,
6 indicates the
Ujjain sorting district,
0 indicates the
Ujjain core area service route,
01 indicates the
Ujjain Head Office as the delivery office. The first digit of a PIN indicates the zone, the second indicates the sub-zone, and the third, combined with the first two, indicates the sorting district within that zone. The final three digits are assigned to individual post offices within the sorting district.
Postal zones There are nine postal zones in India, including eight regional zones and one functional zone (for the Indian Army). The first digit of a PIN indicates the zone and is allocated over the 9 zones as follows:
Sorting district The third digit of a PIN, combined with the first two digits, represents a specific geographical region (except in the case of the functional zone for the Army) called a sorting district that is headquartered at the main post office of the largest city in the region and is known as the
sorting office. A state may have one or more sorting districts depending on the volume of mail handled.
Service route The fourth digit represents the route on which a delivery office is located in the sorting district. Thus, two delivery offices situated next to each other will only have the first four digits in common.
Overseas mail Special cases where mail needs to be sent to locations overseas is handled in an ad hoc manner. For example, the PIN of
Dakshin Gangotri and
Maitri, research stations located in
Antarctica, is 403001, which is of the PIN of
Panaji,
Goa. == Delivery system ==