Thanks to TRAI, we have a National Do Not Call(NDNC) Database being prepared.
According to the official site of NDNC:
The NDNC Registry will be a data base having the list of all telephone numbers of the subscribers who do not want to receive Unsolicited Commercial Communication(UCC). After the establishment of NDNC registry, Telephone subscriber (Landline or mobile) who does not wish to receive UCC, can register their telephone number with their telecom service provider for inclusion in the NDNC. Telecom Service Provider shall upload the telephone number to the NDNC within 45 days of receipt. The Telemarketer will have to verify their calling telephone numbers list with the NDNC registry before making a call.An amount of Rs 500/- per call/message has been prescribed to discourage telemarketers who make calls to numbers registered in Do Not Call list. The defaulter telemarketer will face disconnection of telecom service.
The building up of the database has started very recently on 1st September, 2007.
To request to include your number in the database, you may either register with your Mobile Phone Service Provider, Bank, Credit Card Company or Insurance Company.
If your telecom provider is not there in the list above, please post a comment.