sensors Mode-S transponder
71BF54
ICAO 24-bit transponder address · allocated to Korea, South
Currently assigned to HL7754 · AIRBUS A-330-300
- Hex
- 71BF54
- Octal
- 34337524
- Decimal
- 7,454,548
- Country
- KR
- Tail
- HL7754
- Type
- A333
- Flights observed
- 137
- Distinct callsigns
- 20
- Country
- KR
- Last broadcast
- 2h ago
Current position
Country allocation
The ICAO 24-bit address 71BF54 falls within the block assigned to Korea, South (KR) by ICAO Annex 10, Volume III. Every aircraft registered in Korea, South receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.
Callsign history 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| AAR122 | Asiana Airlines | 11 | 2026-05-30 |
| AAR731 | Asiana Airlines | 9 | 2026-05-14 |
| AAR358 | Asiana Airlines | 7 | 2026-05-03 |
| AAR124 | Asiana Airlines | 7 | 2026-05-11 |
| AAR123 | Asiana Airlines | 6 | 2026-05-11 |
| AAR121 | Asiana Airlines | 6 | 2026-05-18 |
| AAR732 | Asiana Airlines | 5 | 2026-05-15 |
| AAR370 | Asiana Airlines | 5 | 2026-05-13 |
| AAR108 | Asiana Airlines | 5 | 2026-05-13 |
| AAR107 | Asiana Airlines | 5 | 2026-05-06 |
| AAR747 | Asiana Airlines | 4 | 2026-05-10 |
| AAR745 | Asiana Airlines | 4 | 2026-05-14 |
| AAR369 | Asiana Airlines | 4 | 2026-05-13 |
| AAR357 | Asiana Airlines | 4 | 2026-05-08 |
| AAR301 | - | 4 | 2026-05-04 |
| AAR748 | Asiana Airlines | 3 | 2026-05-29 |
| AAR713 | Asiana Airlines | 3 | 2026-05-06 |
| AAR573 | - | 3 | 2026-05-09 |
| AAR365 | Asiana Airlines | 3 | 2026-05-12 |
| AAR362 | Asiana Airlines | 3 | 2026-05-19 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-30 | AAR122 | ICN → NGO | May 30, 00:30 UTC | May 30, 01:40 UTC | 1h 10m |
| 2026-05-29 | AAR748 | HKT → ICN | May 29, 08:55 UTC | May 29, 21:55 UTC | 13h 0m |
| 2026-05-29 | AAR364 | PVG → ICN | May 29, 02:10 UTC | May 29, 07:00 UTC | 4h 50m |
| 2026-05-28 | AAR177 | HND → ICN | May 28, 16:45 UTC | May 28, 18:50 UTC | 2h 5m |
| 2026-05-28 | AAR178 | ICN → HND | May 28, 12:45 UTC | May 28, 14:35 UTC | 1h 50m |
| 2026-05-19 | AAR362 | PVG → ICN | May 19, 05:10 UTC | May 19, 05:40 UTC | 30m |
| 2026-05-19 | AAR361 | ICN → PVG | May 19, 00:30 UTC | May 19, 00:55 UTC | 25m |
| 2026-05-18 | AAR748 | HKT → ICN | May 18, 09:05 UTC | May 18, 22:10 UTC | 13h 4m |
| 2026-05-18 | AAR121 | NGO → ICN | May 18, 03:25 UTC | May 18, 04:40 UTC | 1h 15m |
| 2026-05-18 | AAR122 | ICN → NGO | May 18, 00:30 UTC | May 18, 01:50 UTC | 1h 20m |
| 2026-05-17 | AAR748 | HKT → ICN | May 17, 08:50 UTC | May 17, 22:05 UTC | 13h 15m |
| 2026-05-17 | AAR361 | ICN → PVG | May 17, 00:25 UTC | May 17, 05:25 UTC | 5h 0m |
| 2026-05-15 | AAR732 | SGN → ICN | May 15, 22:50 UTC | May 16, 10:16 UTC | 11h 26m |
| 2026-05-14 | AAR731 | ICN → SGN | May 14, 22:55 UTC | May 15, 10:15 UTC | 11h 20m |
| 2026-05-14 | AAR746 | HKG → ICN | May 14, 18:00 UTC | May 14, 21:10 UTC | 3h 10m |
| 2026-05-14 | AAR745 | ICN → HKG | May 14, 15:10 UTC | May 14, 15:35 UTC | 25m |
| 2026-05-14 | AAR745 | ICN → HKG | May 14, 12:00 UTC | May 14, 14:30 UTC | 2h 30m |
| 2026-05-14 | AAR359 | ICN → HGH | May 14, 03:55 UTC | May 14, 09:25 UTC | 5h 30m |
| 2026-05-14 | AAR1073 | NRT → ICN | May 14, 00:10 UTC | May 14, 02:00 UTC | 1h 50m |
| 2026-05-13 | AAR108 | ICN → NRT | May 13, 10:00 UTC | May 13, 12:00 UTC | 2h 0m |
| 2026-05-13 | AAR370 | CAN → ICN | May 13, 07:20 UTC | May 13, 07:55 UTC | 35m |
| 2026-05-13 | AAR369 | ICN → CAN | May 13, 00:00 UTC | May 13, 00:40 UTC | 40m |
| 2026-05-12 | AAR177 | HND → ICN | May 12, 16:55 UTC | May 12, 18:45 UTC | 1h 50m |
| 2026-05-12 | AAR178 | ICN → HND | May 12, 12:40 UTC | May 12, 14:25 UTC | 1h 45m |
| 2026-05-12 | AAR365 | ICN → PVG | May 12, 05:20 UTC | May 12, 10:05 UTC | 4h 45m |
| 2026-05-12 | AAR111 | KIX → ICN | May 12, 02:45 UTC | May 12, 03:05 UTC | 20m |
| 2026-05-11 | AAR123 | NGO → ICN | May 11, 10:35 UTC | May 11, 11:55 UTC | 1h 20m |
| 2026-05-11 | AAR124 | ICN → NGO | May 11, 07:30 UTC | May 11, 08:50 UTC | 1h 20m |
| 2026-05-11 | AAR361 | ICN → PVG | May 11, 00:30 UTC | May 11, 05:25 UTC | 4h 55m |
| 2026-05-10 | AAR747 | ICN → HKT | May 10, 08:50 UTC | May 10, 21:54 UTC | 13h 5m |
| 2026-05-10 | AAR364 | PVG → ICN | May 10, 02:14 UTC | May 10, 06:50 UTC | 4h 35m |
| 2026-05-09 | AAR573 | - | May 9, 09:25 UTC | May 9, 22:20 UTC | 12h 55m |
| 2026-05-09 | AAR573 | - | May 9, 08:05 UTC | May 9, 08:15 UTC | 10m |
| 2026-05-09 | AAR362 | PVG → ICN | May 9, 00:25 UTC | May 9, 05:25 UTC | 5h 0m |
| 2026-05-08 | AAR357 | ICN → CAN | May 8, 12:30 UTC | May 8, 20:35 UTC | 8h 5m |
| 2026-05-08 | AAR729 | PUS → SGN | May 8, 00:54 UTC | May 8, 10:19 UTC | 9h 25m |
| 2026-05-06 | AAR714 | TPE → ICN | May 6, 09:10 UTC | May 6, 11:10 UTC | 2h 0m |
| 2026-05-06 | AAR713 | ICN → TPE | May 6, 05:30 UTC | May 6, 07:30 UTC | 2h 0m |
| 2026-05-06 | AAR107 | NRT → ICN | May 6, 01:25 UTC | May 6, 02:20 UTC | 55m |
| 2026-05-06 | AAR107 | NRT → ICN | May 6, 00:15 UTC | May 6, 01:20 UTC | 1h 5m |
| 2026-05-05 | AAR108 | ICN → NRT | May 5, 09:50 UTC | May 5, 11:35 UTC | 1h 45m |
| 2026-05-04 | AAR369 | ICN → CAN | May 4, 23:55 UTC | May 5, 07:40 UTC | 7h 45m |
| 2026-05-04 | AAR356 | CAN → ICN | May 4, 19:55 UTC | May 4, 20:40 UTC | 45m |
| 2026-05-04 | AAR355 | ICN → CAN | May 4, 13:00 UTC | May 4, 13:40 UTC | 40m |
| 2026-05-04 | AAR365 | ICN → PVG | May 4, 05:40 UTC | May 4, 10:15 UTC | 4h 35m |
| 2026-05-04 | AAR301 | - | May 4, 00:34 UTC | May 4, 00:45 UTC | 10m |
| 2026-05-03 | AAR358 | CAN → ICN | May 3, 12:55 UTC | May 3, 21:00 UTC | 8h 5m |
| 2026-05-03 | AAR365 | ICN → PVG | May 3, 06:20 UTC | May 3, 10:45 UTC | 4h 25m |
| 2026-05-03 | AAR301 | - | May 3, 01:00 UTC | May 3, 01:10 UTC | 10m |
| 2026-05-02 | AAR747 | ICN → HKT | May 2, 08:50 UTC | May 2, 21:35 UTC | 12h 45m |
About Mode-S
A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.
Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.
Prefer a tail-number view? See the HL7754 page for operator, model, and routing details .