Calstar Steel Limited · Calcast Ferrous Ltd. · Calcast Springs Limited · Calcutta Rail Track Systems Limited · Calstar Power Limited · Calcast Sponge Limited · Calstar Ferrous Limited · Calstar Sponge Limited · Calmet Land Developers Private Limited · Swapno Marketing Private Limited · Calstar Polymers Private Limited · U83859 Wb1997 Plc083859 · Indigo Dealtrade Private Limited · Shagun Commotrade Private Limited