Real world company prefixes

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M n O P Q R S T U V W X Y Z Ø
G& G0 G1 G2 G3 G4 G5 G6 G7 G8 G9 GA GB GC GD GE GF GG GH GI GJ GK GL GM GN GO GP GQ GR GS GT GU GV GW GX GY GZ
GM& GMA GMB GMC GMD GME GMF GMG GMH GMI GMJ GMK GML GMM GMN GMO GMP GMQ GMR GMS GMT GMU GMV GMX GMY GMZ
GM&N GM&O
1 GM&N Gulf, Mobile & Northern R.R. (Co.) 7/1923-7/1954   NAKINA
2 GM&N Gulf, Mobile & Northern R.R. 4/38-1/52   NRHS
3 GM&N GULF, MOBILE & NORTHERN RAILROAD CO.     PWRC
4 GM&O Gulf, Mobile & Ohio R.R. 1/1941-10/1966   NAKINA
5 GM&O Gulf, Mobile & Ohio R.R. 1/52-10/66   NRHS
6 GM&O GULF, MOBILE & OHIO RAILROAD     PWRC