The DND is an abbreviation of Do Not Disturb function. The DND is an initiative taken by TRAI (Telecom Regulatory Authority of India) to prevent the customers from unsolicited calls and SMS. Some Do Not Disturb attributes contains directing the call to a pre-allotted extensions, busy signal, DND signal or recorded message generated by telephone switch.
NDNC which stands for National Do Not Call Registry or do not call list provides you the complete information about how to start DND and to stop it. Also Check DND status of your mobile number and get do not call list numbers.