Telecom Regulatory Authority Of India - Subsection
Section 6(2)(b) in The Telecom Consumers Protection and Redressal of Grievances Regulations, 2007
(b)display, at its each office, Call Centre, customer care centre, help desk, and, at the sales outlets, website and at the office of the Nodal Officer and the appellate authority, the name of the Nodal Officers, their addresses and telephone numbers, e-mail addresses, facsimile numbers and other means of contacting them, in respect of each area for which the Nodal Officers have been appointed or designated.