Press Release

HQ/CS/CL.24B/18543 October 26, 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: Press Release - Tata Communications to Build India’s AI Super Highway Please find enclosed herewith the press release titled “Tata Communications to Build India’s AI Super Highway”, being issued by the Company today (Annexure 1). Further, the details required under the SEBI Master Circular dated January 30, 2026 are enclosed as Annexure 2. Kindly take the above on record. 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: 9228918171 email: investor.relations@tatacommunications.com CIN: L64200MH1986PLC039266 website: www.tatacommunications.com Annexure 1 Annexure 2 Details as required under SEBI Listing Regulations read with SEBI Master Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026 Particulars Details Existing capacity 1.25 Pbps of network capacity Existing capacity utilization ~70% – 80% Proposed capacity addition ~6 Pbps of additional network capacity Period within which the FY 2030 – FY 2036 proposed capacity is to be added Investment required Capital Expenditure of ₹4,350 crores (~US$400-450 million) Mode of financing Operating Cash Flows Rationale Please refer to the Press Release at Annexure 1 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: 9228918171 email: investor.relations@tatacommunications.com CIN: L64200MH1986PLC039266 website: www.tatacommunications.com