Mahanagar Telephone Nigam Ltdhas informed BSE that the meeting of the Board of Directors of the Company is scheduled on 13/11/2026 ,inter alia, to consider and approve LETTER ATTACHED

MAHANAGAR TELEPHONE NIGAM LIMITED (A GOVERNMENT OF INDIA ENTERPRISE) CIN L32101DL1986GOI023501 Registered and Corporate Office: Mahanagar Doorsanchar Sadan 5th Floor, 9 CGO Complex, Lodhi Road, New Delhi - 110 003. Tel: 011-24319020, Website: www.mtnl.in, Email: mtnlcsco@gmail.com MTNL/SECTT/SE/2026 October 21, 2026 To, To, BSE Limited, National Stock Exchange of India Limited (NSE) Phiroze Jeejeebhoy Towers, Dalal Street, Exchange Plaza, Plot No. C/1, G Block Bandra Kurla Fort, Mumbai – 400 001 Complex, Bandra (East), Mumbai – 400 051 Scrip Code: 500108 Scrip Symbol: MTNL SUB: COMPLIANCE OF REGULATION 29 (1) (A) & 50 (1) (C) OF SEBI (LODR) REGULATIONS, 2015 – INTIMATION OF BOARD MEETING FOR APPROVING THE UNAUDITED REVIEWED FINANCIAL RESULTS FOR THE QUARTER AND HALF YEAR ENDED ON 30Th SEPTEMBER, 2026 Dear Sir, Pursuant to Regulation 29(1)(a) & 50(1)(c) of SEBI (LODR) Regulations, 2015, we write to inform you that a meeting of the Board of Directors will be held on Friday, 13th November 2026 to inter-alia consider and approve the Unaudited Reviewed Financial Results for the Quarter and Half Year ended on 30th September, 2026. Also, it was informed vide our letter dated 14.09.2026 that Trading Window for dealing/trading in the shares of the Company has been closed from 01.10.2026 to 15.11.2026 (both days inclusive). Kindly acknowledge the receipt and take the same on record. Thanking you, Yours faithfully, (RATAN MANI SUMIT) COMPANY SECRETARY