Have you been left out of Census exercise? Just call up or e-mail the authorities to inform them about the 'miss' and they will soon dispatch officials to include the household in the count.

The mammoth census exercise will cover 1.2 billion residents spread over 35 states and Union Territories.

The office of the Census Commissioner of India has launched a toll free helpline number-- 1800 110 111-- for citizens who can call and inform the call centre if they have been missed by the Census officials.

"The call centre will then route the missing report to the official responsible who will subsequently ask the enumerators in his jurisdiction to pay a visit to the concerned citizen on a priority basis," a Census official said.

An individual can also send an e-mail to 'rgoffice.rgi@nic.in' informing the Census authorities that they have not been counted, the official said.

The facilities of the helpline and e-mail can be utilised both for the Census exercise and the enumeration under the National Population Register, the official added.

All the states and Union Territories have earmarked date for commencement of the exercise and if any citizen finds that his family has not been covered in the exercise he or she can inform us, he said.

Apart from the online and telephone facilities, citizens can also inform the local Tehsildar, ward officer of his area who is the designated officer for Census about the non-coverage. The Commissioner, Collector, or District Magistrate can also be contacted in such cases.

The Census would cover all 640 districts, 5,767 tehsils, 7742 towns and more than six lakh villages in the country. More than 24 crore households will be visited and 1.20 billion people enumerated during this exercise.

To carry out this massive exercise, more than 2.5 million people will be engaged including retired government employees.