Real world company prefixes
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UA UB UC UD UE UF UG UH UI UJ UK UL UM UN UO UP UQ UR US UT UU UV UW UX UY UZ
UDA UDC UDF UDI UDL UDM UDN UDR UDS UDT UDU UDX UDY
UA UB UC UD UE UF UG UH UI UJ UK UL UM UN UO UP UQ UR US UT UU UV UW UX UY UZ
UDA UDC UDF UDI UDL UDM UDN UDR UDS UDT UDU UDX UDY
| 1 | UDA | Psudiklat Perhubungan Udara/PLP | ICAO1 | ||
| 2 | UDAX | North American Car Corp. | Jan-52 | NRHS | |
| 3 | UDAX | UNITED DISTILLERS OF AMERICA, INC. (NORTH AMERICAN CAR CORP.) | PWRC | ||
| 4 | UDAX | United Distillers of America, Inc. | 1/1950 | NAKINA | |
| 5 | UDAX | North American Car Corp. | 1/1952 | NAKINA | |
| 6 | UDC | DonbassAero | IATA: 5D | ICAO1 | |
| 7 | UDC | UNION DEPOT COMPANY - COLUMBIA, OHIO | PWRC | ||
| 8 | UDCA | URIBE DURAN, CARLOS | SCAC4 | ||
| 9 | UDCP | UNION DISTRIBUTING COMPANY | SCAC4 | ||
| 10 | UDCS | UNITED ORCHIDS PLUS CORP | SCAC4 | ||
| 11 | UDCT | UNITED DRIVERS CORPORATION INC | SCAC4 | ||
| 12 | UDFC | UNITED FUEL & ENERGY CORPORATION | SCAC4 | ||
| 13 | UDFG | UNITED FOOD GROUP LLC | SCAC4 | ||
| 14 | UDFI | UNITED AIR LINES INC | SCAC4 | ||
| 15 | UDFT | UNITED DAIRY FARMERS TRANSIT INC | SCAC4 | ||
| 16 | UDIET | Gleis- und Signalbau Uwe Dietrich | DE | VKM | |
| 17 | UDIP | UNITED DISPATCH INC | SCAC4 | ||
| 18 | UDIQ | URQUART DELIVERY INC | SCAC4 | ||
| 19 | UDIX | Utilities Distributors, Inc. | Jan-52 | NRHS | |
| 20 | UDIX | UTILITIES DISTRIBUTORS, INC. [UTILITIES TRANSPORT CO.] | PWRC | ||
| 21 | UDIX | Utilities Distributors, Inc. | 1/1943 | NAKINA | |
| 22 | UDIX | Utilities Transport Co. | 1/1945 | NAKINA | |
| 23 | UDIX | Utilities Distributors Gas Co., Inc. | 1/1946-1/1950 | NAKINA | |
| 24 | UDIX | Utilities Distributors, Inc. | 1/1952; eliminated 7/1953 | NAKINA | |
| 25 | UDLC | UPDIKE DISTRIBUTION LOGISTICS LLC | SCAC4 | ||
| 26 | UDMA | UNIVAR DE MEXICO SA DE CV | SCAC4 | ||
| 27 | UDN | Dniproavia | ICAO1 | ||
| 28 | UDNS | ULUSOY DENIZYOLLAAI ISLETMECILIGI A | SCAC4 | ||
| 29 | UDRM | UNIVERSAL DRUM RECONDITIONING CO | SCAC4 | ||
| 30 | UDRS | UNITED STATES DEPARTMENT OF AGRICUL | SCAC4 | ||
| 31 | UDRY | USA Logistics | SCAC2 | ||
| 32 | UDRY | USA DRY VAN LOGISTICS LLC | SCAC4 | ||
| 33 | UDSC | U.S. COURIER CORPORATION OF LOS ANGELES | SCAC1 | ||
| 34 | UDSC | U S COURIER CORPORATION OF LOS ANGE | SCAC4 | ||
| 35 | UDSE | U D S | SCAC4 | ||
| 36 | UDSL | UNITED DELIVERY SERVICE, LTD | SCAC1 | ||
| 37 | UDSL | UNITED DELIVERY SERVICE LTD | SCAC4 | ||
| 38 | UDSN | UDS INC | SCAC4 | ||
| 39 | UDSP | UNITED SPEED LOGISTICS LTD | SCAC4 | ||
| 40 | UDSS | UNIQUE DELIVERY SERVICE | SCAC4 | ||
| 41 | UDST | UNITED DISTRIBUTION SYSTEM INC | SCAC4 | ||
| 42 | UDSY | UNICITY DISTRIBUTION SYSTEMS (CANADA) INC | SCAC1 | ||
| 43 | UDTC | UP & DOWN TRUCKING | SCAC4 | ||
| 44 | UDTE | UNITED TRANSPORT SERVICES INC | SCAC4 | ||
| 45 | UDTI | U DIRECT TRANSPORTATION INC | SCAC4 | ||
| 46 | UDTK | UNCLE DONS TRUCKING | SCAC4 | ||
| 47 | UDTL | U DIRECT TRANSPORTATION | SCAC4 | ||
| 48 | UDTO | UNITED DRIVER TRANSPORT INC | SCAC4 | ||
| 49 | UDTP | UNION DE TRANSPORTISTAS DE VALLE HE | SCAC4 | ||
| 50 | UDTT | UNIDOS TRANSPORT | SCAC4 | ||
| 51 | UDTZ | UPPER DEERFIELD TOWNSHIP NEW JERSEY | PWRC | ||
| 52 | UDUI | UDUI TRUCKING LLC | SCAC4 | ||
| 53 | UDX | United Dairy Co. | Apr-38 | NRHS | |
| 54 | UDX | UNITED DAIRY CO., INC. | PWRC | ||
| 55 | UDX | United Dairy Co. | 7/1935 | NAKINA | |
| 56 | UDX | United Dairy Co., Inc. | 7/1937-4/1938 | NAKINA | |
| 57 | UDX | United Dairy Co. | 1/1941 | NAKINA | |
| 58 | UDYG | UNITED DRAYAGE | SCAC4 |