| 1 | OD | Zuliana de Aviacion .C.A. | ICAO: ULA, Callsign: Zuliana, Designator OD recalled by IATA | YV | AVCODES |
| 2 | OD | Natalco Airlines Limited | Designator OD recalled by IATA | ZRE | AVCODES |
| 3 | OD | Transportes Aereos Mercantiles Panamericanos S.A., (TAMPA) | | CO | AVCODES |
| 4 | OD | Malindo Airways Sdn Bhd (Malindo Air) | ICAO: MXD, Callsign: Malindo Express, ICAO callsign changed to Malindo. | MAL | AVCODES |
| 5 | OD | Malindo Airways Sdn Bhd (Malindo Air) | ICAO: MXD, Callsign: Malindo, Name changed to Malindo Airways Sdn Bhd d/b/a Batik Air. ICAO callsign changed from Malindo Express. | MAL | AVCODES |
| 6 | OD | Malindo Airways Sdn Bhd d/b/a Batik Air | ICAO: MXD, Callsign: Malindo, Name chanegd from Malindo Airways Sdn Bhd (Malindo Air). ICAO callsign changed from Malindo Express. | MAL | AVCODES |
| 7 | OD | Oftobanen Drift AS | | NO | VKM |
| 8 | OD&W | Oneida & Western R.R. | 4/1938-7/1954 | | NAKINA |
| 9 | OD&W | Oneida & Western R.R. | 4/38-1/52 | | NRHS |
| 10 | OD&W | ONIEDA & WESTERN RAILROAD | | | PWRC |
| 11 | ODA | Aircompany Black Sea Airlines LLC | | UA | AVCODES |
| 12 | ODAI | ODOM ANTENNAS INC | | | SCAC3 |
| 13 | ODAK | Odakyu | | J | TRAFFIC |
| 14 | ODAKB | Odakyu Bus | | J | TRAFFIC |
| 15 | ODAKHH | Odakyu Hakone Highway Bus Co. | | J | TRAFFIC |
| 16 | ODAQ | ONE A TRUCKING INC (1-A TRUCKING IN | | | SCAC3 |
| 17 | ODB | Air Service | Callsign: Servair, | RMM | AVCODES |
| 18 | ODBS | OLSON DISTRIBUTION SYSTEMS INC | | | SCAC3 |
| 19 | ODBZ | OLD BEN #24 MINE | | | PWRC |
| 20 | ODCN | OVERHEAD DOOR CORPORATION | | | SCAC4 |
| 21 | ODCO | OVERDRIVE CORPORATION | | | SCAC3 |
| 22 | ODCP | OLIVA DELIVERY CORP | | | SCAC4 |
| 23 | ODCS | OLDCASTLE GLASS BURNABY | | | SCAC4 |
| 24 | ODCX | Old Dominion Chapter, National Railway Historial Society | 7/2005 (not listed) | | NAKINA |
| 25 | ODCX | OLD DOMINION CHAPTER, NATIONAL RAILWAY HISTORICAL SOCIETY | | | PWRC |
| 26 | ODCX | OLD DOMINION CHAPTER, NATIONAL RAIL | | | SCAC4 |
| 27 | ODDC | OWENS DELUXE DOLLHOUSE COMPANY | | | SCAC4 |
| 28 | ODDS | ONE DAY DELIVERY SERVICE | | | SCAC3 |
| 29 | ODDT | OLDLAND TRANSPORTATION INC | | | SCAC3 |
| 30 | ODDU | WELFIT ODDY (PTY) LIMITED | | ZA | BIC |
| 31 | ODDU | WELFIT ODDY (PTY) LIMITED | | | SCAC4 |
| 32 | ODDY | ODDYS, A INC | | | SCAC3 |
| 33 | ODEC | ODESSA & CO | | | SCAC4 |
| 34 | ODEG | Ostdeutsche Eisenbahn GmbH | Parchim | D | privat-bahn.de |
| 35 | ODEG | Ostdeutsche Eisenbahn GmbH | | D | TRAFFIC |
| 36 | ODEG | Ostdeutsche Eisenbahngesellschaft | | DE | VKM |
| 37 | ODEI | ODOM ENTERPRISES INC | | | SCAC3 |
| 38 | ODEL | ODELL MOP COMPANY INC | | | SCAC3 |
| 39 | ODEP | ODONNELLS EXPRESS LTD | | | SCAC3 |
| 40 | ODER | OUTSTATE DELIVERY | | | SCAC4 |
| 41 | ODES | ODESSEY CORP | | | SCAC3 |
| 42 | ODES | OPTRON DE MEXICO SA DE CV | | | SCAC4 |
| 43 | ODES | | City: Odessa | UA | TRAFFIC |
| 44 | ODET | KP Odesmiskelektrotrans | City: Odessa | A | TRAFFIC |
| 45 | ODEW | ODEON EVENING WEAR | | | SCAC4 |
| 46 | ODEY | ODEY TRANSPORTATION | | | SCAC3 |
| 47 | ODEY | ODEY TRANSPORTATION | | | SCAC4 |
| 48 | ODF | Osnabrücker Dampflokfreunde e.V. | Osnabrück | D | privat-bahn.de |
| 49 | ODF | Osnabrücker Dampflokfreunde e.V | | DE | VKM |
| 50 | ODFE | OLD DOMINION FREIGHT LINE INC (EXPE | | | SCAC4 |
| 51 | ODFL | OLD DOMINION FREIGHT LINE, INC | | | SCAC3 |
| 52 | ODFL | OLD DOMINION FREIGHT LINE | | | SCAC4 |
| 53 | ODFN | OLD DOMINION FREIGHT LINE INC | | | SCAC4 |
| 54 | ODFS | ODONNELL FREIGHT SYSTEMS | | | SCAC3 |
| 55 | ODFS | ORR, DAVID F TRUCKING LLC | | | SCAC4 |
| 56 | ODGH | ODONOGHUE, JAMES | | | SCAC4 |
| 57 | ODHM | OLDHAM BROS INC | | | SCAC4 |
| 58 | ODHQ | OVERMYER, D H WHSE | | | SCAC3 |
| 59 | ODHT | OLDHAM TRUCKING | | | SCAC3 |
| 60 | ODI | Jonsson, H. Air Taxi | Callsign: Odinn, | IS | AVCODES |
| 61 | ODI | Jonsson, H Air Taxi | | | ICAO1 |
| 62 | ODIC | ON DEMAND INC | | | SCAC4 |
| 63 | ODIM | ODIM SPECTRUM LTD | | | SCAC4 |
| 64 | ODIN | ODIN Logistics AG | | DE | VKM |
| 65 | ODIQ | ODIN INC | | | SCAC3 |
| 66 | ODIR | ORROCK DIRECT INDUSTRIAL COURIER | | | SCAC4 |
| 67 | ODKG | O'DANIEL TRUCKING COMPANY | | | SCAC3 |
| 68 | ODKL | ORCHID TRUCKING LLC | | | SCAC4 |
| 69 | ODLA | OCEAN DRIVE LIMOUSINES INC | | | SCAC4 |
| 70 | ODLC | ODLE CONSTRUCTION CO | | | SCAC3 |
| 71 | ODLC | OMAHA DIRECT LOGISTICS | | | SCAC4 |
| 72 | ODLD | ODYSSEY OVERLAND LLC | | | SCAC4 |
| 73 | ODLG | ODELL TRANSFER AND STORAGE | | | SCAC3 |
| 74 | ODLI | ODONNELL LIMOUSINE INC | | | SCAC3 |
| 75 | ODLL | ODONNELL LTD | | | SCAC3 |
| 76 | ODLL | OIL DEPOT LLC | | | SCAC4 |
| 77 | ODLN | ON DEMAND LOGISTICS INC | | | SCAC4 |
| 78 | ODLO | ODELL OIL CO INC | | | SCAC4 |
| 79 | ODLQ | OAKLEY DEDICATED LOGISTICS LLC | | | SCAC4 |
| 80 | ODLS | OLYMPIC DELIVERY SERVICE INC | | | SCAC3 |
| 81 | ODLY | ODALYS TRUCKING | | | SCAC3 |
| 82 | ODM | Pan African Airways Ltd | IATA: 5F, Callsign: Jetafrica, | EAK | AVCODES |
| 83 | ODM | Pan African Airways | | | ICAO1 |
| 84 | ODMC | ODOM CORPORATION, THE | | | SCAC4 |
| 85 | ODMI | ORTIZ, D & M TRANSPORT INC | | | SCAC4 |
| 86 | ODMK | ODOM TRUCKING | | | SCAC4 |
| 87 | ODMM | ODELL-MCKENZIE MOVING & STORAGE | | | SCAC3 |
| 88 | ODMR | ODOM, W RAY | | | SCAC3 |
| 89 | ODMT | ODOM TRUCKING INC | | | SCAC3 |
| 90 | ODMT | OSADCHUK, M TRUCKING | | | SCAC4 |
| 91 | ODNE | ODEN ENTERPRISES INC | | | SCAC3 |
| 92 | ODNF | OLD NEIGHBORHOOD FOODS | | | SCAC4 |
| 93 | ODNL | ODONNELL, ARTHUR L | | | SCAC3 |
| 94 | ODOJ | ODO, J D & SON TRUCKING | | | SCAC3 |
| 95 | ODON | O'DONNELL, VONDA | | | SCAC4 |
| 96 | ODOR | ODOR TECH | | | SCAC4 |
| 97 | ODOS | OSTRAVSKA DOPRAVNI SPOLEČNOST, a.s. | | CZ | VKM |
| 98 | ODOT | OKLAHOMA DEPARTMENT OF TRANSPORTATION | | | PWRC |
| 99 | ODOX | Old Dominion Oil Co. | 8/1920 | | NAKINA |
| 100 | ODOX | OLD DOMINION OIL CO. | | | PWRC |
