Issuing a new regulation to curb unsolicited commercial calls, TRAI said the regulation would come into effect from yesterday.

The National Informatics Centre (NIC) has been tasked with creating a national "do not call registry" (NDNC) database containing the telephone numbers of subscribers who do not wish to receive unsolicited commercial communication (UCC) within three months.

After the establishment of the NDNC registry, landline and cellular subscribers who does not wish to receive UCC can register their numbers with the telecom service provider for inclusion in the registry.

"The telemarketer will have to register with NDNC registry to avail the facility of scrubbing their calling list," TRAI said in a statement.

An amount of Rs500 per call / message has been prescribed to discourage telemarketers who makes calls to numbers registered in the do not call list.

"The defaulter telemarketer will face disconnection of telecom services," the regulator said.