FINANCIAL CALENDAR 2011

Áthens, February 21, 2011 - The Hellenic Telecommunications Organization SA (OTE SA), in accordance with paragraphs 4.1.2 and 4.1.4.3.1 of the Athens Stock Exchange Regulation, announces its Financial Calendar, according to which:

1. The Annual General Shareholders Meeting will take place on Thursday, June23, 2011 at OTE headquarters, 99 Kifisias Av., Marousi, Athens.

2. The 2010 Parent Company and consolidated financial statements will be released on Friday, February 25, 2011 (uploaded on the company's website: http://www.ote.gr/portal/page/portal/InvestorRelation and on the Athens Stock Exchange's website) and published in the press on the following day.

3. The Company will hold a conference call with analysts and investors to discuss its full year 2010 financial results, on Friday, February 25, 2011.

4. The ex-dividend date will be Tuesday, June 28, 2011. The ex-dividend date follows the expiry of the June series derivatives related to OTE, and to indices of which the OTE share is a component.

5. The record date for the dividend's beneficiaries (Athens Stock Exchange's Record Date) will be Thursday, June 30, 2011.

6. Dividend payment will start on Wednesday, July 6, 2011.

OTE Group is Greece's leading telecommunications organization and one of the pre-eminent players in Southeastern Europe, providing top-quality products and services to its customers.

Apart from serving as a full service telecommunications group in the Greek telecoms market, OTE Group has also expanded during the last decade its geographical footprint throughout South East Europe, acquiring stakes in the incumbent telecommunications companies of Romania and Serbia, and establishing mobile operations in Albania, Bulgaria and Romania. At present, companies in which OTE Group has an equity interest employ about 32,000 people in four countries, and our portfolio of solutions ranges from fixed and mobile telephony to Internet applications, satellite, maritime communications and consultancy services.

Listed on the Athens Stock Exchange, the company trades under the ticker HTO. Following OTE's delisting from NYSE, OTE ADSs (American Depositary Shares) trade in the OTC (Over The Counter) market under the ticker HLTOY. OTE continues to report to SEC.

Contacts:

OTE: Dimitris Tzelepis - Head of Investor Relations

Tel: +30 210 611 1574, Email: [email protected] 

Maria Kountouri - Assistant to the Head of Investor Relations

Tel: +30 210 611 5381, Email: [email protected] 

Christina Hadjigeorgiou - Financial Analyst, Investor Relations

Tel: +30 210 611 1428, Email: [email protected]

Dimitris Tsatsanis - Financial Analyst, Investor Relations

Tel: +30 210 611 6071, Email: [email protected]

Daria Kozanoglou - Senior Communications & Regulatory Affairs Officer,

Investor Relations

Tel: +30 210 611 1121, Email: [email protected]

Eftychia Tourna - Communications & Regulatory Affairs Officer, Investor Relations

Tel: +30 210 611 7236, Email: [email protected]

Eleni Agoglossaki - Communications & Regulatory Affairs Officer, Investor Relations

Tel: +30 210 611 7880, Email: [email protected]

Forward-looking statement