▁- ▁North ▁Sh ore ▁Rail road ▁ ▁NS L ▁ ▁- ▁St . ▁Lawrence ▁and ▁Ra qu ette ▁River ▁Rail road ▁ ▁NS L U ▁- ▁Nor asia ▁Services , ▁Ltd . ▁ ▁NS L Z ▁- ▁N est le ▁Transport ation ▁Company ▁ ▁NS P X ▁- ▁Northern ▁States ▁Power ▁Company ▁ ▁NS P Z ▁- ▁Nor folk ▁Southern ▁Railway ▁ ▁NS R ▁ ▁- ▁New burgh ▁and ▁South ▁Sh ore ▁Rail road ▁ ▁NS RC ▁- ▁North ▁Str at ford ▁Rail road ▁ ▁NS R X ▁- ▁Jack ▁F rost ▁C ane ▁Sug ar ▁ ▁N SS ▁ ▁- ▁New burgh ▁and ▁South ▁Sh ore ▁Railway ▁ ▁N SS X ▁- ▁National ▁Salv age ▁and ▁Service ▁Corporation ▁ ▁N ST X ▁- ▁North ▁Star ▁Ste el ▁Company ▁ ▁NS X Z ▁- ▁Nor folk ▁Southern ▁Railway ▁ ▁NS Z ▁ ▁- ▁Nor folk ▁Southern ▁Railway ▁ ▁N TI U ▁- ▁German ischer ▁Lloyd ▁ ▁N T K X ▁- ▁V AE ▁N ort rak ▁North ▁America , ▁Inc . ▁ ▁N TL X ▁- ▁Nash tex ▁Le asing ▁ ▁N T NU ▁- ▁National ▁Container ▁Network , ▁Inc . ▁ ▁N TR ▁ ▁- ▁N atch ez ▁Trace ▁Rail road ; ▁Mississippi ▁Central ▁Rail road ▁ ▁N TR X ▁- ▁N TL ▁Transport ation ▁Corporation ▁ ▁N TR Y ▁- ▁N im ish ill en ▁and ▁T us car aw as ▁ ▁N TT X ▁- ▁T TX ▁Company ▁ ▁N T Z R ▁- ▁N atch ez ▁Railway ▁ ▁N