In another move to enhance cybersecurity and curb online financial fraud, TRAI has directed banks, mutual fund firms, non-banking financial companies, and insurance firms to adopt a ‘1600’ numbering series, he said.

Source: https://telecom.economictimes.indiatimes.com/news/policy/trai-unveils-new-measures-to-combat-spam-calls-and-financial-fraud-in-india/125778965