Regional Office Cologne/Bonn Airport diwa aviation Deutschland GmbH   Terminal 1 M Level 04, Room 405 P.O. Box 98 01 48 55129 Köln Germany   Mr. Diehl Tel. +49 (0)2203 – 980 154 10 Corporate Contacts » Aviation Service Center » Regional Office North, HAM » Regional Office West, CGN » Regional Office Central, FRA » Regional Office South, MUC » Regional Office East, BER » Head Office, Munich » Contact Form