EntityQ1126041· pop 5· linked from 17 articlescongstarSign in to savethumb|Headquarter in Cologne.Article3 sectionsContentsSee alsoReferencesExternal linksthumb|Headquarter in Cologne.Congstar GmbH is a mobile network operator headquartered in Cologne, Germany.Read full article (9 paragraphs)ConnectionsCologneEntitymobile network operatorEntityCategoriesCompanies based in CologneDeutsche TelekomGerman brandsMobile phone companies of Germany