Anzahl Buchstaben: 3
| IAA |
| IAB |
| IAF |
| IAH |
| IAL |
| IAM |
| IAN |
| IAO |
| IAS |
| IBA |
| IBB |
| IBE |
| IBF |
| IBI |
| IBM |
| IBN |
| IBO |
| IBU |
| IBY |
| ICA |
| ICC |
| ICE |
| ICH |
| ICI |
| ICK |
| ICO |
| ICS |
| IDA |
| IDD |
| IDE |
| IDI |
| IDO |
| IDR |
| IDX |
| IEA |
| IEB |
| IEE |
| IEH |
| IEP |
| IES |
| IFA |
| IFE |
| IFF |
| IFO |
| IGA |
| IGB |
| IGE |
| IGH |
| IGO |
| IGS |
| IGW |
| IHA |
| IHF |
| IHI |
| IHK |
| IHL |
| IHM |
| IHN |
| IHO |
| IHR |
| IHS |
| III |
| IJA |
| IJS |
| IKA |
| IKB |
| IKE |
| IKI |
| IKK |
| IKR |
| IKS |
| ILA |
| ILE |
| ILF |
| ILG |
| ILI |
| ILK |
| ILL |
| ILM |
| ILO |
| ILS |
| ILU |
| ILZ |
| IMA |
| IMD |
| IMG |
| IMI |
| IMO |
| IMP |
| IMR |
| IMS |
| IMU |
| INA |
| INC |
| IND |
| INE |
| INF |
| ING |
| INH |
| INI |
| INK |
| INL |
| INN |
| INO |
| INP |
| INR |
| INS |
| INT |
| INV |
| IOC |
| IOD |
| IOE |
| IOK |
| ION |
| IOS |
| IOT |
| IPA |
| IPC |
| IPD |
| IPE |
| IPF |
| IPO |
| IPS |
| IPU |
| IQD |
| IQE |
| IRA |
| IRC |
| IRE |
| IRI |
| IRK |
| IRL |
| IRO |
| IRP |
| IRQ |
| IRR |
| IRU |
| ISA |
| ISE |
| ISH |
| ISI |
| ISK |
| ISL |
| ISO |
| ISS |
| IST |
| ISU |
| ITA |
| ITB |
| ITE |
| ITF |
| ITH |
| ITI |
| ITO |
| ITP |
| ITR |
| ITS |
| ITT |
| ITU |
| ITV |
| ITZ |
| IUS |
| IVA |
| IVI |
| IVO |
| IVY |
| IWA |
| IWC |
| IWE |
| IWF |
| IWO |
| IWV |
| IYO |
| IZA |
| IZU |
| IZV |
| JAA |
| JAB |
| JAD |
| JAF |
| JAK |
| JAM |
| JAN |
| JAO |
| JAP |
| JAT |
| JAU |
| JAY |
| JAZ |
| JBK |
| JEN |
| JES |
| JET |
| JEU |
| JEZ |
| JFK |
| JIA |
| JIE |
| JIG |
| JIL |