Certificate under Regulation 74(5) of SEBI Depositories and Participants) Regulations, 2018 for the quarter ended September 30, 2026

HQ/CS/CL.24B/18522 October 12, 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 National Securities Depository Ltd., Central Depository Services (India) Ltd. 3rd Floor, Naman Chamber, Plot C-32, 25th Floor, Marathon Futurex, G-Block, Bandra Kurla Complex (East), NM Joshi Marg, Lower Parel (East), Mumbai - 400051 Mumbai – 400 013 Dear Sir / Madam, Sub: Certificate under Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended September 30, 2026. This is to certify that the details of securities dematerialized / rematerialized during the aforesaid period, as required under Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018 have been furnished to all the Stock Exchanges where the securities of Tata Communications Limited are listed. 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