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
Broadcasting now · callsign AAR121 · 34,000 ft
Flights observed
137
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

Current position

71BF54 is currently broadcasting. Map zoomed to live 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

DateFlightRouteTakeoffLandingDuration
2026-05-30 AAR122 ICN → NGO May 30, 00:30 UTCMay 30, 01:40 UTC1h 10m
2026-05-29 AAR748 HKT → ICN May 29, 08:55 UTCMay 29, 21:55 UTC13h 0m
2026-05-29 AAR364 PVG → ICN May 29, 02:10 UTCMay 29, 07:00 UTC4h 50m
2026-05-28 AAR177 HND → ICN May 28, 16:45 UTCMay 28, 18:50 UTC2h 5m
2026-05-28 AAR178 ICN → HND May 28, 12:45 UTCMay 28, 14:35 UTC1h 50m
2026-05-19 AAR362 PVG → ICN May 19, 05:10 UTCMay 19, 05:40 UTC30m
2026-05-19 AAR361 ICN → PVG May 19, 00:30 UTCMay 19, 00:55 UTC25m
2026-05-18 AAR748 HKT → ICN May 18, 09:05 UTCMay 18, 22:10 UTC13h 4m
2026-05-18 AAR121 NGO → ICN May 18, 03:25 UTCMay 18, 04:40 UTC1h 15m
2026-05-18 AAR122 ICN → NGO May 18, 00:30 UTCMay 18, 01:50 UTC1h 20m
2026-05-17 AAR748 HKT → ICN May 17, 08:50 UTCMay 17, 22:05 UTC13h 15m
2026-05-17 AAR361 ICN → PVG May 17, 00:25 UTCMay 17, 05:25 UTC5h 0m
2026-05-15 AAR732 SGN → ICN May 15, 22:50 UTCMay 16, 10:16 UTC11h 26m
2026-05-14 AAR731 ICN → SGN May 14, 22:55 UTCMay 15, 10:15 UTC11h 20m
2026-05-14 AAR746 HKG → ICN May 14, 18:00 UTCMay 14, 21:10 UTC3h 10m
2026-05-14 AAR745 ICN → HKG May 14, 15:10 UTCMay 14, 15:35 UTC25m
2026-05-14 AAR745 ICN → HKG May 14, 12:00 UTCMay 14, 14:30 UTC2h 30m
2026-05-14 AAR359 ICN → HGH May 14, 03:55 UTCMay 14, 09:25 UTC5h 30m
2026-05-14 AAR1073 NRT → ICN May 14, 00:10 UTCMay 14, 02:00 UTC1h 50m
2026-05-13 AAR108 ICN → NRT May 13, 10:00 UTCMay 13, 12:00 UTC2h 0m
2026-05-13 AAR370 CAN → ICN May 13, 07:20 UTCMay 13, 07:55 UTC35m
2026-05-13 AAR369 ICN → CAN May 13, 00:00 UTCMay 13, 00:40 UTC40m
2026-05-12 AAR177 HND → ICN May 12, 16:55 UTCMay 12, 18:45 UTC1h 50m
2026-05-12 AAR178 ICN → HND May 12, 12:40 UTCMay 12, 14:25 UTC1h 45m
2026-05-12 AAR365 ICN → PVG May 12, 05:20 UTCMay 12, 10:05 UTC4h 45m
2026-05-12 AAR111 KIX → ICN May 12, 02:45 UTCMay 12, 03:05 UTC20m
2026-05-11 AAR123 NGO → ICN May 11, 10:35 UTCMay 11, 11:55 UTC1h 20m
2026-05-11 AAR124 ICN → NGO May 11, 07:30 UTCMay 11, 08:50 UTC1h 20m
2026-05-11 AAR361 ICN → PVG May 11, 00:30 UTCMay 11, 05:25 UTC4h 55m
2026-05-10 AAR747 ICN → HKT May 10, 08:50 UTCMay 10, 21:54 UTC13h 5m
2026-05-10 AAR364 PVG → ICN May 10, 02:14 UTCMay 10, 06:50 UTC4h 35m
2026-05-09 AAR573 - May 9, 09:25 UTCMay 9, 22:20 UTC12h 55m
2026-05-09 AAR573 - May 9, 08:05 UTCMay 9, 08:15 UTC10m
2026-05-09 AAR362 PVG → ICN May 9, 00:25 UTCMay 9, 05:25 UTC5h 0m
2026-05-08 AAR357 ICN → CAN May 8, 12:30 UTCMay 8, 20:35 UTC8h 5m
2026-05-08 AAR729 PUS → SGN May 8, 00:54 UTCMay 8, 10:19 UTC9h 25m
2026-05-06 AAR714 TPE → ICN May 6, 09:10 UTCMay 6, 11:10 UTC2h 0m
2026-05-06 AAR713 ICN → TPE May 6, 05:30 UTCMay 6, 07:30 UTC2h 0m
2026-05-06 AAR107 NRT → ICN May 6, 01:25 UTCMay 6, 02:20 UTC55m
2026-05-06 AAR107 NRT → ICN May 6, 00:15 UTCMay 6, 01:20 UTC1h 5m
2026-05-05 AAR108 ICN → NRT May 5, 09:50 UTCMay 5, 11:35 UTC1h 45m
2026-05-04 AAR369 ICN → CAN May 4, 23:55 UTCMay 5, 07:40 UTC7h 45m
2026-05-04 AAR356 CAN → ICN May 4, 19:55 UTCMay 4, 20:40 UTC45m
2026-05-04 AAR355 ICN → CAN May 4, 13:00 UTCMay 4, 13:40 UTC40m
2026-05-04 AAR365 ICN → PVG May 4, 05:40 UTCMay 4, 10:15 UTC4h 35m
2026-05-04 AAR301 - May 4, 00:34 UTCMay 4, 00:45 UTC10m
2026-05-03 AAR358 CAN → ICN May 3, 12:55 UTCMay 3, 21:00 UTC8h 5m
2026-05-03 AAR365 ICN → PVG May 3, 06:20 UTCMay 3, 10:45 UTC4h 25m
2026-05-03 AAR301 - May 3, 01:00 UTCMay 3, 01:10 UTC10m
2026-05-02 AAR747 ICN → HKT May 2, 08:50 UTCMay 2, 21:35 UTC12h 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 .

Mode-S 71BF54 frequently asked

What is Mode-S code 71BF54?
71BF54 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7754.
Where is Mode-S 71BF54 registered?
Mode-S code 71BF54 is allocated to Korea, South (KR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 71BF54 broadcasting right now?
Yes. Mode-S 71BF54 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF54, octal 34337524, decimal 7,454,548.
What flights does 71BF54 operate?
Mode-S 71BF54 has broadcast 20 distinct callsigns, including AAR122, AAR731, AAR358, AAR124, AAR123.