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 September 30, 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 30 OF SEBI (LODR) REGULATIONS, 2015- DISCLOSURE OF EVENTS OR INFORMATION – EXTENSION OF ADDITIONAL CHARGE OF THE POST OF DIRECTOR (HR & EB), MTNL ASSIGNED TO Dr. KALYAN SAGAR NIPPANI, DIRECTOR (HR) BSNL-reg Dear Sir, Further to our Letter of even no dated 24.03.2026 and in compliance of Regulation 30 of SEBI (LODR) Regulations, 2015, this is to inform you that in continuation to Department of Telecommunications (DoT)’s order of even number dated 24.03.2026, Department of Telecommunications (DoT), Ministry of Communications, Government of India vide its Letter No. E-2-3/2021-PSA dated 30.09.2026 (copy attached herewith) has extended Additional Charge of the Post of Director (HR & EB), MTNL in favour of Dr. Kalyan Sagar Nippani, Director (HR), BSNL for a further period of three months w.e.f. 01.10.2026 to 31.12.2026 or until further orders, whichever is earlier subject to the approval of the Appointments Committee of the Cabinet (ACC). Kindly take the same on record. Thanking You Yours Faithfully, (RATAN MANI SUMIT) COMPANY SECRETARY