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, Fax: 011-24324243, Website: www.mtnl.in Email: mtnlcsco@gmail.com MTNL/SECTT/SE/2026 August 14, 2026 To, To, BSE Limited, National Stock Exchange of India Limited (NSE) Phiroze Jeejeebhoy Towers, Dalal Exchange Plaza, Plot No. C/1, G Block Bandra Kurla Street, Fort, Mumbai – 400 001. Complex, Bandra (East), Mumbai – 400 051 Scrip Code: 500108 Scrip Symbol: MTNL Sub: COMPLIANCE WITH REGULATION 30 & 47 OF SEBI (LODR) REGULATIONS, 2015 – SUBMISSION OF NEWSPAPER ADVERTISEMENT Dear Sir, Pursuant to Regulation 30 and 47(3) read with Schedule III of SEBI (LODR) Regulations, 2015 please find enclosed the copies of newspaper advertisement published on 14.08.2026, in the newspaper Financial Express (English Newspaper) and Jansatta (Hindi Newspaper), regarding publishing of Unaudited Standalone and Consolidated Financial Results for the 1st Quarter ended on 30.06.2026 which were considered, approved and taken on record by the Board of Directors in their meeting held on 12.08.2026. Further, in terms of Regulation 46 of SEBI (LODR) Regulations, 2015, the aforesaid Financial Results are also being uploaded on the website of the Company (www.mtnl.in). Kindly take the same on your records. Thanking You, Yours faithfully, (RATAN MANI SUMIT) COMPANY SECRETARY