| Abbreviation | Definition |
|---|---|
| IPT | Williamsport, Pennsylvania USA |
| IPU | Ipiau, Ba, Brazil |
| IPW | Ipswich, England, UK |
| IQM | Qiemo, Mainland China |
| IQN | Qingyang, Mainland China |
| IQQ | Iquique, Chile |
| IQT | Iquitos, Peru |
| IRA | Kirakira, Solomon Islands |
| IRB | Iraan, Texas USA |
| IRC | Circle, Alaska USA |
| IRD | Ishurdi, Bangladesh |
| IRE | Irece, Ba, Brazil |
| IRG | Lockhart Rivers, Queensland, Australia |
| IRI | Iringa, Tanzania |
| IRJ | La Rioja, La Rioja, Argentina |
| IRK | Kirksville Airport, Kirksville, Missouri USA |
| IRP | Isiro, Congo |
| ISA | Mount Isa, Australia |
| ISB | Islamabad, Pakistan |
| ISC | St, Marys, Isles Of Scilly, England, UK |