FIRST QUARTER 2017 FINANCIAL RESULTS UNDER IFRS TO BE RELEASED

ON MAY 11, 2017

ATHENS, Greece – April 24, 2017 – Hellenic Telecommunications Organization SA  (ΟΤΕ ASE: HTO, OTC MARKET:HLTOY), announces that it will release its first quarter 2017 results under IFRS on Thursday, May 11, 2017, before the opening of the Athens Stock Exchange.

Following the above release OTE's management will host on the same day, a conference call with analysts and investors at 17:00 (GREECE) / 16:00 (CONTINENT) / 15:00 (UK) /10:00 (EASTERN US) to review said results.

Details regarding the conference call dial-in and replay numbers as well as the live audio webcast of the conference call, following the results, can be accessed at:

https://ote.irwebpage.com/conference_calls/