The spam call situation had grown grimmer in India in 2018, a country with more than 1 billion active mobile subscribers causing bad customer experience, propagation of fake news and financial scams. The Telecom Regulatory Authority of India (TRAI) had acknowledged UCC (Unsolicited Commercial Communication) or spam calls are a major nuisance to telecom subscribers across the country and is a growing menace that needs to be tackled with immediate effect. Though TRAI had established a “Do Not Disturb” (DND) list in 2010 with more than 230 million subscribers on it, unregistered telemarketers continue to spam customers, obtaining their consent through fraudulent and questionable tactics. Through various internal and external assessments, DLT was provisioned as the underlying technology to curb the menace. Tech Mahindra, a Hyperledger member, developed a Plug-n-Play solution, built on Hyperledger Fabric to mitigate the challenge and thereby showcasing its prowess in the Blockchain tech space. With the solution successfully deployed across three major telcos in India, Tech Mahindra has access to >50% market. This has potential to create global impact and we have already reached out to Federal Communications Commission (FCC) in the US market and exploring opportunities to socialize it with US based telcos where robo-calling and caller ID spoofing are key pain areas that can be addressed by our solution.