Telecom Regularoty of India TRAI has launched a Toll Free Number where users can report the Mischieves or bad calls which they get from International and for which the number displays as local or National number, you can dial Dial 1800110420 or 1963 to report to TRAI.
Below is the Message or SMS TRAI is sending to everyone
As per GOVT. instructions If you receive any international call received for which CLI displayed is similar to a local or National No. then please call on 1963 or toll free number 1800110420