core/homeassistant/components/ibeacon/icons.json

{
  "entity": {
    "device_tracker": {
      "device_tracker": {
        "default": "mdi:bluetooth-off",
        "state": {
          "home": "mdi:bluetooth-connect"
        }
      }
    },
    "sensor": {
      "estimated_distance": {
        "default": "mdi:signal-distance-variant"
      }
    }
  }
}