Ballycoolin Road, Dublin 11, Ireland. + (0) 1 [email protected] tns -connect. com. TNS CONNECT – Germany. TNS Connect Germany, Karlsruhe, Germany. Contacting us is easy. Select the method you are most comfortable with, either email, phone or perhaps your looking for one of our global offices. Based in Dublin, Ireland ; Bracknell, UK; Dusseldorf, Germany; Paris, France; Stockholm, Sweden; Las Palmas, Spain and China, TNS Services Mainland.