Twitter International Company Registration information Date of registration 21 Jan, 2016 Date last updated 20 Jan, 2023 Contact information Principal Address 1 Cumberland Place, Fenian Street, Dublin 2, Dublin, D2, Dublin Country Ireland Contact phone number 014375200 Main activities of the organisation Information Technology Responsible person Name Ronan Costello Email rcostello@twitter.com Phone Number 014375200 CRO Information CRO N/A Company Registration Name Twitter International Company