| 201 | HAM | HIGHWAY AMERICA | | | SCAC4 |
| 202 | HAMA | HAMILTON AIR CONVEYORS CO INC | | | SCAC4 |
| 203 | HAMB | HAM TRUCKING | | | SCAC4 |
| 204 | HAMD | HAMILTON, D., TRUCKING, INC | | | SCAC1 |
| 205 | HAMD | HAMILTON, D, TRUCKING, INC | | | SCAC4 |
| 206 | HAME | HAMME | | | SCAC4 |
| 207 | HAMF | HARBOR AIRLINES MOTOR FREIGHT, Harbor Airlines, INC | | | SCAC1 |
| 208 | HAMG | HAMILTON TRUCKING COMPANY INC | | | SCAC4 |
| 209 | HAMI | HASTINGS MECHANICAL INC | | | SCAC4 |
| 210 | HAML | HAML Corp | City: New Brunswick | US-NJ | TRAFFIC |
| 211 | HAMM | HAMM | | | SCAC4 |
| 212 | HAMM | Stadtwerke Hamm | City: Hamm | D | TRAFFIC |
| 213 | HAMO | HAMPSHIRE PAPER CORP | | | SCAC4 |
| 214 | HAMP | HAMPSHI | | | SCAC4 |
| 215 | HAMS | HAMES TRUCKING INC | | | SCAC4 |
| 216 | HAMT | HALLAMORE CORP | | | SCAC4 |
| 217 | HAMU | HAPAG LLOYD A.G | | D | BIC |
| 218 | HAMU | COSTA LINE | | | PWRC |
| 219 | HAMU | Costa Line | | | RSRV |
| 220 | HAMU | CP SHIPS | | | SCAC4 |
| 221 | HAMV | HAMLETT, VAN E | | | SCAC4 |
| 222 | HAMX | North American Car Corp. | added 10/1964; 7/1965-1/1975; eliminated 1/1977 | | NAKINA |
| 223 | HAMX | North American Car Corp. | 7/65-1/75; eliminated 1/77 | | NRHS |
| 224 | HAMX | NORTH AMERICAN CAR CORP. | | | PWRC |
| 225 | HAN | Hyannis Aviation | Callsign: Air Hyannis, | USA | AVCODES |
| 226 | HAN | Hansung Airlines | IATA: HS, Callsign: Hansung Air, Rebranded as T'Way Airline. Suspended operations October 2008. | ROK | AVCODES |
| 227 | HAN | Aushaan Air Limited | Callsign: King Bee, | EAK | AVCODES |
| 228 | HAN | Hansung Airlines | | | ICAO1 |
| 229 | HAN | Hanson Aggregates UK | | GB | TRAFFIC |
| 230 | HANA | HANSA LINE | | | PWRC |
| 231 | HANA | HANA EXPRESS A DIV OF HANAKO INC | | | SCAC4 |
| 232 | HANB | HANIFEN COMPANY INC | | | SCAC4 |
| 233 | HAND | HANSON TRUCKING CO | | | SCAC4 |
| 234 | HANF | HANSON FUEL COMPANY INC | | | SCAC4 |
| 235 | HANG | HANA GLOBAL INC | | | SCAC4 |
| 236 | HANG | Hangartner AG. | | CH | TRAFFIC |
| 237 | HANH | HIDEAWAY ANTIQUES | | | SCAC4 |
| 238 | HANJ | HANJIN EXPRESS | | | SCAC4 |
| 239 | HANKAI | Hankai Tramway Co. | City: Osaka, Sakai | J | TRAFFIC |
| 240 | HANM | HANM TRANSPORTATION MANAGEMENT SERV | | | SCAC4 |
| 241 | HANO | HANDS OF AMERICA INC | | | SCAC4 |
| 242 | HANQ | HANA LOGISTICS | | | SCAC4 |
| 243 | HANR | HANSENS, L FORWARDING LTD | | | SCAC4 |
| 244 | HANS | HANSON TRANSPORT, INC | | | SCAC1 |
| 245 | HANS | HANJIN SHIPPING CO LTD (BULK DIVISI | | | SCAC4 |
| 246 | HANS | Hanseatische Eisenbahn-Gesellschaft | | D | TRAFFIC |
| 247 | HANT | HANAN TRANSPORT | | | SCAC4 |
| 248 | HANU | HCT HANSA CONTAINER TRADING GMBH | | D | BIC |
| 249 | HANU | HANSA LINE | | | PWRC |
| 250 | HANU | Hansa Line | | | RSRV |
| 251 | HANU | HANAN SHIPPING LLC | | | SCAC4 |
| 252 | HANV | HAVEDINGS, ANKO | | | SCAC4 |
| 253 | HANX | L. Hansen's Forwarding | 7/2000-7/2005 (not listed) | | NAKINA |
| 254 | HANX | Hancock Oil Co. of California | 7/1930-4/1947 | | NAKINA |
| 255 | HANX | Hancock Oil Co. of California | Apr-38 | | NRHS |
| 256 | HANX | L. Hansen's Forwarding | Jul-00 | | NRHS |
| 257 | HANX | *HANCOCK OIL CO. OF CALIFORNIA | | | PWRC |
| 258 | HANX | +L. HANSENS FORWARDING | | | PWRC |
| 259 | HANX | L. Hansen's Forwarding | | | RSRV |
| 260 | HANX | HANSENS, L FORWARDING | | | SCAC4 |
| 261 | HANY | HANEY TRUCK LINE | | | SCAC4 |
| 262 | HAO | Holland Aero Leasing B.V. | Callsign: Aerolines, ICAO callsign changed to Tulip. | NL | AVCODES |
| 263 | HAO | Holland Aero Leasing B.V. | IATA: SE, Callsign: Tulip, ICAO callsign changed from Aerolines. | NL | AVCODES |
| 264 | HAO | Harty Aviation | Callsign: Harty, | ET | AVCODES |
| 265 | HAOC | HUNTER-ASH OIL CO INC | | | SCAC4 |
| 266 | HAOI | HARRIS OIL COMPANY INC | | | SCAC4 |
| 267 | HAOS | HAGELAND AVIATION SERVICES INC | | | SCAC4 |
| 268 | HAOT | HARGIN TRANSPORT LLC | | | SCAC4 |
| 269 | HAOY | HAWKINS OIL COMPANY OF LA GRANGE IN | | | SCAC4 |
| 270 | HAP | Helicopteros Aero Personal, S.A. de C.V. | Callsign: Helipersonal, | MEX | AVCODES |
| 271 | HAP | Helicopteros Aero Personal | | | ICAO1 |
| 272 | HAPA | HAPPY AUNTIE S A | | | SCAC4 |
| 273 | HAPC | HILL AND PERRY, INC | | | SCAC4 |
| 274 | HAPE | HAP ENTERPRISES LTD | | | SCAC4 |
| 275 | HAPG | HAMBURG-AMERICAN LINE | | | PWRC |
| 276 | HAPG | HAMBURG AMERICAN LINE | | | SCAC4 |
| 277 | HAPL | HAPPY TRANSPORT LLC | | | SCAC4 |
| 278 | HAPM | HAPPACH MARINE LTD | | | SCAC4 |
| 279 | HAPN | HAMPDEN MOVING & STORAGE INC | | | SCAC4 |
| 280 | HAPP | HAPPY TRUCKING INC | | | SCAC4 |
| 281 | HAPR | HARRIS TRANSPORT COMPANY | | | SCAC1 |
| 282 | HAPR | HARRIS TRANSPORT COMPANY | | | SCAC4 |
| 283 | HAPT | HARMS PACIFIC TRANSPORT INC | | | SCAC4 |
| 284 | HAPU | H.A.P. FOODS HOLLAND B.V. | | NL | BIC |
| 285 | HAPU | H A P FOODS HOLLAND B V | | | SCAC4 |
| 286 | HAPW | HARP, WAYNE TRUCKING INC | | | SCAC4 |
| 287 | HAPX | Helm-Atlantic Leasing Limited Partnership | 7/2000-7/2005 (not listed) | | NAKINA |
| 288 | HAPX | Helm-Atlantic Leasing Limited Partnership | Jul-00 | | NRHS |
| 289 | HAPX | HELM-ATLANTIC LEASING, LP | | | PWRC |
| 290 | HAPX | Helm-Atlantic Leasing | | | RSRV |
| 291 | HAPX | HELM ATLANTIC LEASING LIMITED PARTN | | | SCAC4 |
| 292 | HAQI | HEROIC AQUILA INC | | | SCAC4 |
| 293 | HAQY | HAYNES, JOHN S TRUCKING CO INC | | | SCAC4 |
| 294 | HAR | Harbor Airlines | IATA: HB, Callsign: Harbor, Founded in March 1971, originally named Oak Harbor Airlines. Suspended all flights in May 2001. | USA | AVCODES |
| 295 | HAR | Harbor Airlines | IATA: HB | | ICAO1 |
| 296 | HARC | HARVEST CA | | | SCAC4 |
| 297 | HARD | HARLESS, DICK L | | | SCAC4 |
| 298 | HARE | HARRIS, CHARLES | | | SCAC4 |
| 299 | HARF | HAR-TRANS FREIGHT | | | SCAC4 |
| 300 | HARI | HARRIS, RICHARD L | | | SCAC4 |
