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Created in 1949 (United States), Hellenic Telecommunications Organization is part of our Top Web Popularity Telecommunication Services, own 53 sister brands and 3453 competing brands. The Hellenic Telecommunications Organization brand is owned by HELLENIC TELECOMMUNICATIONS ORGANIZATION, a company listed in Etats-Unis. Its International Securities Identification Number (ISIN) is GRS260333000. Hellenic Telecommunications Organization is part of the Telecommunication Services activity sector.