Dataport is the information and communication service of the administrative authorities for the four federal states of Hamburg, Schleswig-Holstein, Bremen and Saxony-Anhalt as well as for the administrative services in Mecklenburg-Vorpommern and Lower Saxony. The public law institution was founded on the basis of an international treaty on 1 January 2004 and is headquartered in Altenholz near Kiel with branches in Hamburg, Rostock, Bremen, Lüneburg, Magdeburg and Halle.