| 3201 | HOGX | Clougherty Packing Co. | added 1/90; 1/94; eliminated 4/97 | NRHS | |
| 3202 | HOGX | *HARLIS OIL & GAS CO. | PWRC | ||
| 3203 | HOGX | *CLOUGHERTY PACKING | PWRC | ||
| 3204 | HOGX | *UNION PACIFIC RAILROAD | PWRC | ||
| 3205 | HOGX | Harlis Oil & Gas (Union Pacific Railroad) | RSRV | ||
| 3206 | HOHF | HOSS, H F | SCAC4 | ||
| 3207 | HOHI | H M H TRANSPORTATION INC | SCAC4 | ||
| 3208 | HOHL | HOHL'S PROPANE EXPRESS INC | SCAC4 | ||
| 3209 | HOHM | HOHMANN, A & CO INC | SCAC4 | ||
| 3210 | HOHQ | HOLTON OIL CO | SCAC4 | ||
| 3211 | HOIA | H'OMEGA INC | SCAC4 | ||
| 3212 | HOIC | HOLIDAY ON ICE | PWRC | ||
| 3213 | HOIC | HORNE OIL COMPANY | SCAC4 | ||
| 3214 | HOIG | HOGBINS OIL INC | SCAC4 | ||
| 3215 | HOII | HERBST OIL INC | SCAC4 | ||
| 3216 | HOIL | H OIL INC | SCAC4 | ||
| 3217 | HOJ | Horsens - Odder Jernbane | 1904 - 1967 | DK | jernbanen.dk |
| 3218 | HOJ | Horsens - Odder Jernbane | 1904 - 1967 | DK | TRAFFIC |
| 3219 | HOJO | Hojo Railway Company | J | TRAFFIC | |
| 3220 | HOK | Hokuetsu Express Co., Ltd. | J | TRAFFIC | |
| 3221 | HOKC | HASKO TRUCKING INC | SCAC4 | ||
| 3222 | HOKG | HARCO TRUCKING LLC | SCAC4 | ||
| 3223 | HOKKB | Hokkaido Bus Co. | J | TRAFFIC | |
| 3224 | HOKKO | Hokko Kanko Bus | J | TRAFFIC | |
| 3225 | HOKL | HOMELAND TRUCK LINES | SCAC4 | ||
| 3226 | HOKS | Hokuso Railway | J | TRAFFIC | |
| 3227 | HOKU | Hokuetsu | J | TRAFFIC | |
| 3228 | HOKX | Occidental Chemical Corp. | added 1/1992; 1/1994-7/2005 | NAKINA | |
| 3229 | HOKX | Occidental Chemical Corp., Electrochemicals & Specialty Products | added 10/1989; eliminated 1/1992 | NAKINA | |
| 3230 | HOKX | Occidental Chemical Corp., Electrochemicals, Detergents & Specialty Products | added 1/1988; eliminated 10/1989 | NAKINA | |
| 3231 | HOKX | Occidental Chemical Corp., Electrochemicals, Detergent & Specialty Products Group | added 7/1987; eliminated 1/1988 | NAKINA | |
| 3232 | HOKX | Occidental Chemical Corp., Industrial & Specialty Chemicals | added 7/1984; eliminated 7/1987 | NAKINA | |
| 3233 | HOKX | Occidental Chemical Corp., Hooker Industrial & Specialty Chemicals | added 10/1982; eliminated 7/1984 | NAKINA | |
| 3234 | HOKX | Hooker Chemicals and Plastics Corp. | added 7/1974; 1/1975-1/1980; eliminated 10/1982 | NAKINA | |
| 3235 | HOKX | Hooker Chemical Corp. | added 10/1958; 4/1961-4/1970; eliminated 7/1974 | NAKINA | |
| 3236 | HOKX | Hooker Electrochemical Co. | 7/1930-10/1957; eliminated 10/1958 | NAKINA | |
| 3237 | HOKX | Hooker Electrochemical Co. | 4/38-10/57; eliminated 10/58 | NRHS | |
| 3238 | HOKX | Hooker Chemical Corp. | added 10/58; 4/61-4/70 | NRHS | |
| 3239 | HOKX | Hooker Chemicals and Plastics Corp. | 1/75-1/80; eliminated 10/82 | NRHS | |
| 3240 | HOKX | Occidental Chemical Corp., Hooker Industrial & Specialty Chemicals | added 10/82; eliminated 7/84 | NRHS | |
| 3241 | HOKX | Occidental Chemical Corp., Industrial & Specialty Chemicals | added 7/84; eliminated 7/87 | NRHS | |
| 3242 | HOKX | Occidental Chemical Corp., Electrochemicals, Detergent & Specialty Products Group | added 7/87; eliminated 1/88 | NRHS | |
| 3243 | HOKX | Occidental Chemical Corp., Electrochemicals, Detergents & Specialty Products | added 1/88; eliminated 10/89 | NRHS | |
| 3244 | HOKX | Occidental Chemical Corp., Electrochemicals & Specialty Products | added 10/89; eliminated 1/92 | NRHS | |
| 3245 | HOKX | Occidental Chemical Corp. | added 1/92; 1/94-7/2000 | NRHS | |
| 3246 | HOKX | HOOKER INDUSTRIAL & SPECIALTY CHEMICALS (OCCIDENTAL CHEMICAL CORP.) | PWRC | ||
| 3247 | HOKX | Hooker Chemical (Occidental Chemical Corporation) | RSRV | ||
| 3248 | HOKX | OCCIDENTAL CHEMICAL CORP., AGRICULT | SCAC4 | ||
| 3249 | HOKX | Occidental Chemical Corporation | USA | TRAFFIC | |
| 3250 | HOL | Holiday Airlines | ICAO1 | ||
| 3251 | HOLA | HOLIDAY TRUCKING L L C | SCAC4 | ||
| 3252 | HOLB | Hollinger Bus Lines | CDN | TRAFFIC | |
| 3253 | HOLC | HEATWAVE OIL LLC | SCAC4 | ||
| 3254 | HOLCH | Holcim (Schweiz) AG | CH | TRAFFIC | |
| 3255 | HOLCH | Holcim (Schweiz) AG | CH | VKM | |
| 3256 | HOLD | HOLDEN TRUCKING INC | SCAC4 | ||
| 3257 | HOLE | HOLSTINE, R R LLC | SCAC4 | ||
| 3258 | HOLF | HOFFMAN, LENNY EXCAVATING INC | SCAC4 | ||
| 3259 | HOLG | HOMAN LOGISTICS INC | SCAC4 | ||
| 3260 | HOLI | HARTLEY OIL COMPANY INC | SCAC4 | ||
| 3261 | HOLN | HOLLAND TRANSPORTATION CO INC | PWRC | ||
| 3262 | HOLN | HOLIMAN TRANSPORT LLC | SCAC4 | ||
| 3263 | HOLP | HOLLANDS EXPRESS INC | SCAC4 | ||
| 3264 | HOLQ | HOGAN TRANSPORTATION LLC | SCAC4 | ||
| 3265 | HOLR | HOLLIS, RICH | SCAC4 | ||
| 3266 | HOLT | HOLLAND TRANSFER COMPANY | SCAC4 | ||
| 3267 | HOLU | HOEGH LINES AS | SCAC1 | ||
| 3268 | HOLU | HOLCIM (SCWEIZ) AG | SCAC4 | ||
| 3269 | HOLW | HOLLOW TRUCKING COMPANY | SCAC4 | ||
| 3270 | HOLW | Holloway Bus Service | US- | TRAFFIC | |
| 3271 | HOLX | Home Oil Refining Co. of Texas | 8/1920 | NAKINA | |
| 3272 | HOLX | HOME OIL REFINING CO. OF TEXAS | PWRC | ||
| 3273 | HOLZ | HOLMAN CEMENT CO. | PWRC | ||
| 3274 | HOM | Aero Homex | ICAO1 | ||
| 3275 | HOMA | HOMESTEAD FUEL INC | SCAC4 | ||
| 3276 | HOMC | HOMEDIRECT INC | SCAC4 | ||
| 3277 | HOMR | HOME TRANSPORT INC | SCAC4 | ||
| 3278 | HOMS | HOME MOVING & STORAGE COMPANY | SCAC4 | ||
| 3279 | HOMW | HOMETOWN | SCAC4 | ||
| 3280 | HOMX | The CIT Group/Capital Finance, Inc. | added 1/2006 | NAKINA | |
| 3281 | HOMX | PLM International, Inc. | added 1/1997; 7/2000-7/2005; eliminated 1/2006 | NAKINA | |
| 3282 | HOMX | Home Oil Co., Ltd. | added 5/1983; 1/1994; eliminated 1/1997 | NAKINA | |
| 3283 | HOMX | Home Petroleum Corp. | added 10/1978; 1/1980; eliminated 5/1983 | NAKINA | |
| 3284 | HOMX | Home Petroleum Corp. | added 10/78; 1/80; eliminated 5/83 | NRHS | |
| 3285 | HOMX | Home Oil Co., Ltd. | added 5/83; 1/94; eliminated 1/97 | NRHS | |
| 3286 | HOMX | PLM International, Inc. | added 1/97; 7/2000 | NRHS | |
| 3287 | HOMX | *HOME OIL COMPANY LTD. [HOME PETROLEUM CO.] | PWRC | ||
| 3288 | HOMX | +THE CIT GROUP/CAPITAL FINANCE, INC. [PLM INTERNATIONAL INC.] | PWRC | ||
| 3289 | HOMX | Home Oil (PLM International) | RSRV | ||
| 3290 | HOMX | CIT GROUP/CAPITAL FINANCE INC, THE | SCAC4 | ||
| 3291 | HONG | HONG, J FARMS | SCAC4 | ||
| 3292 | HONI | HONSTEIN OIL CO | SCAC4 | ||
| 3293 | HONO | HONORATO CASTILLO, FRANCISCO | SCAC4 | ||
| 3294 | HONT | HONEY TRANSPORT INC | SCAC4 | ||
| 3295 | HONW | HONEYWELL INTERNATIONAL | SCAC4 | ||
| 3296 | HONX | Honeymead Products Co. (Division of Harvest States Cooperatives) | added 4/1989; 1/1994-7/2000; eliminated 10/2000; 7/2005 (not listed) | NAKINA | |
| 3297 | HONX | Honeymead Products Co. | added 1/1980; 1/1980; eliminated 4/1989 | NAKINA | |
| 3298 | HONX | Honeymead Products Co. | added 1/80; 1/80; eliminated 4/89 | NRHS | |
| 3299 | HONX | Honeymead Products Co. (Division of Harvest States Cooperatives) | added 4/89; 1/94-7/2000; eliminated 10/2000 | NRHS | |
| 3300 | HONX | *HONEY CREEK RAILROAD, INC. | PWRC |