Census of India: Location Code structure
general pattern followed in coding of any geographical unit was a
serpentine one, beginning from the Northwest corner and completing at
the farthest Southeast corner within the defined higher level of the
geographical hierarchy. In so far as the state/union territory is
concerned Jammu & Kashmir has code number 01 and code number 35 has
been allotted to the union territory of Andaman & Nicobar Islands.
Generally, the administrative jurisdiction below a district is a
sub-district, for example, a tahsil or a taluk. However, in certain
states and union territories exceptions had to be made since the
nomenclature for sub-districts is not uniform throughout the country.
For example, in Orissa Police station is the sub-district, in West
Bengal it is the community Development Block and so on.
In Assam, Mizoram and Orissa there are a few sub-districts which
cut across the district jurisdictions: In such situations the
sub-districts have been provided a separate series of code numbers viz.
9000, 9001 and so on.
One of the major initiatives taken in the Census 2001 was the allotment
of Permanent Location Code Number (PLCN) to each and every village
within the State and not within a tahsil as in the earlier censuses.
PLCN was thus assigned as one continuous number from the first village
in the first district to the last village in the last district. PLCN is
an eight digit unique location code number with the first six digits
representing the code number of the village and the last two digits
depicting two zeros '00'. These zeros are reserved as buffer to be used
for coding any new village(s) that may come up between two villages in
future. For example, if a new village comes up between two villages
with PLCNs 01254600 and 01254700, the new village will be allotted PLCN
1254601 and so on. .
The location code number for a town is also an eight digit number
starting with the digit 4 situated at the extreme left acting as the
unique identifier. The next two digits depict the code number of the
district in which the town falls followed by two digits representing
the town serial number in the district. There are three zeros at the
end as buffer, mainly to meet the requirement for bringing the number
of digits to eight to match the number of digits in the PLCN for the
villages. Thus a town location code number 40305000 represents the town
serial number 5 of the district number 03 in a State.
The out-growths of towns have not been given any independent location
code numbers. These have been given notional ward codes after the last
ward code of the respective towns.