General Updates

HQ/CS/CL.24B/18442 June 25, 2026 National Stock Exchange of India Limited BSE Limited Exchange Plaza, Bandra Kurla Complex, P.J. Towers, Dalal Street, Mumbai – 400 051 Mumbai – 400 001 SYMBOL: TATACOMM Scrip Code: 500483 Dear Sir / Madam, Sub: Intimation under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 – Update regarding Fire Incident This is further to our letter dated June 5, 2026 wherein we had informed of a fire incident that occurred at a company which has leased our premises at Next-Gen Tower, Greater Kailash-1, New Delhi 110048. Immediately following the incident, Tata Communications activated its business continuity protocols, as applicable in force majeure events of this nature, to maintain service continuity and minimise disruptions to its customers being served from the data centre facility at this premise. Following the incident, the Company promptly reached out to affected customers and continues to work closely with them on recovery. A majority of the data of the customers who were affected has now been successfully recovered, with only limited cases requiring further validation and rebuilding. Some customers with resilient multi-location architectures experienced no disruption, whereas some customers faced temporary operational disruption due to the time required to recover critical systems; however, overall business impact has not been material, and the Company’s operations continue unaffected. The Company maintains adequate insurance coverage to address any potential financial impact or liabilities arising from the incident. Kindly take the same on your records. Thanking you, Yours faithfully, For Tata Communications Limited Zubin Adil Patel Company Secretary and Compliance Officer Tata Communications Limited Plot No. C21 & C 36 ‘G’ Block Bandra Kurla Complex Bandra (East) Mumbai 400098 India Regd. Office: VSB Mahatma Gandhi Road Fort Mumbai – 400 001 Tel: 91 92289 18171 email: investor.relations@tatacommunications.com CIN: L64200MH1986PLC039266 website: www.tatacommunications.com