Companies Telefónica telecommunications company based in Madrid, Spainfounded 19 April 1924, dissolved 1988 SubsidiariesVVirgin Media O2founded 1 June 2021Owned byVivendifounded 18 December 1987BlackRockfounded 1988OwnsTTesco Mobilefounded 2003 From Wikipedia and Wikidata (public domain), updated daily.
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