Apparatus

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sensors Mode-S transponder

71BF41

ICAO 24-bit transponder address · allocated to Korea, South

Currently assigned to HL7741 · AIRBUS A-330-300

Hex
71BF41
Octal
34337501
Decimal
7,454,529
Country
KR
Tail
HL7741
Type
A333
No current signal · last broadcast 2d ago
Flights observed
316
Distinct callsigns
20
Country
KR
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 71BF41.

Country allocation

The ICAO 24-bit address 71BF41 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
AAR713 - 16 2026-06-27
AAR108 - 16 2026-06-24
AAR107 - 16 2026-06-25
AAR124 Asiana Airlines 14 2026-06-13
AAR714 - 13 2026-06-27
AAR123 - 12 2026-06-13
AAR122 - 12 2026-06-28
AAR121 - 12 2026-06-28
AAR177 - 9 2026-07-01
AAR745 Asiana Airlines 8 2026-05-24
AAR370 - 8 2026-06-24
AAR178 - 8 2026-07-01
AAR746 Asiana Airlines 7 2026-05-24
AAR369 - 7 2026-07-06
AAR364 - 7 2026-06-26
AAR359 - 7 2026-06-30
AAR302 - 7 2026-07-04
AAR301 - 7 2026-07-04
AAR748 - 6 2026-07-10
AAR361 Asiana Airlines 6 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 AAR9011 - Jul 12, 04:40 UTCJul 12, 06:40 UTC2h 0m
2026-07-10 AAR748 - Jul 10, 22:00 UTCJul 10, 22:20 UTC20m
2026-07-10 AAR747 - Jul 10, 09:00 UTCJul 10, 18:35 UTC9h 35m
2026-07-09 AAR747 - Jul 9, 09:45 UTCJul 9, 22:50 UTC13h 5m
2026-07-08 AAR366 - Jul 8, 10:55 UTCJul 8, 11:40 UTC45m
2026-07-08 AAR365 - Jul 8, 06:55 UTCJul 8, 07:40 UTC45m
2026-07-07 AAR173 - Jul 7, 05:45 UTCJul 7, 08:00 UTC2h 15m
2026-07-07 AAR174 - Jul 7, 01:40 UTCJul 7, 04:05 UTC2h 25m
2026-07-06 AAR577 - Jul 6, 10:30 UTCJul 6, 22:30 UTC12h 0m
2026-07-06 AAR369 - Jul 6, 00:35 UTCJul 6, 08:15 UTC7h 40m
2026-07-04 AAR366 - Jul 4, 05:20 UTCJul 4, 10:20 UTC5h 0m
2026-07-04 AAR302 - Jul 4, 03:20 UTCJul 4, 03:40 UTC20m
2026-07-04 AAR301 - Jul 4, 00:20 UTCJul 4, 00:35 UTC15m
2026-07-03 AAR358 - Jul 3, 13:30 UTCJul 3, 21:40 UTC8h 10m
2026-07-02 AAR731 - Jul 2, 22:55 UTCJul 3, 11:25 UTC12h 30m
2026-07-02 AAR356 - Jul 2, 19:55 UTCJul 2, 20:35 UTC40m
2026-07-02 AAR355 - Jul 2, 13:00 UTCJul 2, 13:40 UTC40m
2026-07-01 AAR731 - Jul 1, 22:55 UTCJul 2, 11:00 UTC12h 5m
2026-07-01 AAR177 HND → ICN Jul 1, 16:45 UTCJul 1, 18:40 UTC1h 55m
2026-07-01 AAR178 ICN → HND Jul 1, 12:30 UTCJul 1, 14:20 UTC1h 50m
2026-07-01 AAR365 - Jul 1, 06:10 UTCJul 1, 10:50 UTC4h 40m
2026-07-01 AAR302 - Jul 1, 03:50 UTCJul 1, 04:00 UTC10m
2026-07-01 AAR301 - Jul 1, 00:30 UTCJul 1, 00:50 UTC20m
2026-06-30 AAR568 - Jun 30, 19:00 UTCJun 30, 19:20 UTC20m
2026-06-30 AAR567 - Jun 30, 11:55 UTCJun 30, 12:10 UTC15m
2026-06-30 AAR359 - Jun 30, 04:10 UTCJun 30, 09:45 UTC5h 35m
2026-06-29 AAR177 - Jun 29, 16:59 UTCJun 29, 18:49 UTC1h 50m
2026-06-29 AAR178 - Jun 29, 12:34 UTCJun 29, 14:14 UTC1h 40m
2026-06-28 AAR732 - Jun 28, 23:09 UTCJun 29, 10:55 UTC11h 45m
2026-06-28 AAR105 - Jun 28, 11:04 UTCJun 28, 13:00 UTC1h 55m
2026-06-28 AAR106 - Jun 28, 07:14 UTCJun 28, 09:05 UTC1h 50m
2026-06-28 AAR121 - Jun 28, 03:19 UTCJun 28, 04:44 UTC1h 25m
2026-06-28 AAR122 - Jun 28, 00:25 UTCJun 28, 01:40 UTC1h 15m
2026-06-27 AAR714 - Jun 27, 11:00 UTCJun 27, 11:35 UTC35m
2026-06-27 AAR714 - Jun 27, 09:40 UTCJun 27, 09:55 UTC15m
2026-06-27 AAR713 - Jun 27, 07:49 UTCJun 27, 08:10 UTC20m
2026-06-27 AAR713 - Jun 27, 05:55 UTCJun 27, 06:35 UTC40m
2026-06-27 AAR302 - Jun 27, 03:25 UTCJun 27, 03:49 UTC25m
2026-06-27 AAR301 - Jun 27, 00:25 UTCJun 27, 00:34 UTC10m
2026-06-26 AAR748 - Jun 26, 09:05 UTCJun 26, 22:10 UTC13h 5m
2026-06-26 AAR364 - Jun 26, 02:09 UTCJun 26, 07:14 UTC5h 5m
2026-06-25 AAR177 - Jun 25, 16:59 UTCJun 25, 18:55 UTC1h 55m
2026-06-25 AAR178 - Jun 25, 12:40 UTCJun 25, 14:34 UTC1h 55m
2026-06-25 AAR365 - Jun 25, 05:50 UTCJun 25, 10:25 UTC4h 35m
2026-06-25 AAR107 - Jun 25, 00:14 UTCJun 25, 02:14 UTC2h 0m
2026-06-24 AAR108 - Jun 24, 09:49 UTCJun 24, 11:39 UTC1h 50m
2026-06-24 AAR370 - Jun 24, 07:10 UTCJun 24, 07:59 UTC50m
2026-06-24 AAR369 - Jun 24, 00:05 UTCJun 24, 00:44 UTC40m
2026-06-23 AAR714 - Jun 23, 09:24 UTCJun 23, 11:40 UTC2h 15m
2026-06-23 AAR713 - Jun 23, 07:25 UTCJun 23, 07:40 UTC15m

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 HL7741 page for operator, model, and routing details .

Mode-S 71BF41 frequently asked

What is Mode-S code 71BF41?
71BF41 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7741.
Where is Mode-S 71BF41 registered?
Mode-S code 71BF41 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 71BF41 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF41, octal 34337501, decimal 7,454,529.
What flights does 71BF41 operate?
Mode-S 71BF41 has broadcast 20 distinct callsigns, including AAR713, AAR108, AAR107, AAR124, AAR714.