| Abbreviation | Definition |
|---|---|
| IBLK | Vallambrosa (ship radio callsign) |
| IBLO | Valbruna (ship radio callsign) |
| IBLQ | Costa Atlantica (ship radio callsign) |
| IBLX | LUIGI COZZA (ship radio callsign) |
| IHR | I Heart Radio |
| IOG | WIOG-FM, 102.5, formerly 106.1, Saginaw, Michigan |
| IOTW | Islands on the Web |
| IRIB | Iranian Republic Iran Broadcasting |
| JABO | Just A Bit Outside |
| JBA | Just Barely Audible |
| JFRB | JieFang RiBao (Liberation Daily) |
| K200AA | LPFM-87.9, Sun Valley, Nevada |
| K289AJ | LPFM-105.7, West Point, California |
| KAAJ | LPFM-103.5, Monticello, Utah |
| KAAM | AM-770, Dallas/ Fort Worth, Texas |
| KAAQ | FM-105.9, Alliance, Nebraska |
| KAAR | AM-590, FM-92.5, Butte, Montana |
| KAAT | FM-103.1, Oakhurst, California |
| KABF | FM-88.3, Little Rock, Arkansas |
| KABF | K Arkansas Broadcasting Foundation |