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
U0 U1 U2 U3 U4 U5 U6 U7 U8 U9 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 UDD UDF UDG UDI UDL UDM UDN UDR UDS UDT UDU UDX UDY
1 UDD Air Company Donbass Airlines IATA: 5D, Callsign: Donbass, IATA designator changed from 7D UA AVCODES
2 UDD Air Company Donbass Airlines IATA: 7D, Callsign: Donbass, IATA designator changed from 5D UA AVCODES
3 UDD Air Company Donbass Airlines IATA: 5D, Callsign: Donbass, Designator 5D recalled by IATA. IATA designator changed from 7D UA AVCODES