Central Coalfields Limited · Coal India Ltd Govt Of India Undertaking · Western Coalfields Limited · South Eastern Coalfields Limited · Mahanadi Coalfields Limited · The Singareni Collieries Company Limited · Central Mine Planning & Design Institute Limited · Nlc Tamil Nadu Power Limited · U10102 Or1992 Plc003038 · U99999 Wb1973 Plc028844 · U10100 Mh1975 Ptc018626 · Northern Coalfields Limited