Apparatus

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sensors Mode-S transponder

71BF32

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

Currently assigned to HL7732 · BOEING 777-200

Hex
71BF32
Octal
34337462
Decimal
7,454,514
Country
KR
Tail
HL7732
Type
B772
No current signal · last broadcast Jul 26, 20:30 UTC
Flights observed
258
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 20:30 UTC

Last known position

Most recent position reported by Mode-S 71BF32.

Country allocation

The ICAO 24-bit address 71BF32 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
AAR551 - 31 2026-07-10
AAR552 - 29 2026-07-10
AAR232 - 19 2026-06-29
AAR271 - 17 2026-07-22
AAR562 Asiana Airlines 15 2026-06-29
AAR272 - 15 2026-07-21
AAR601 Asiana Airlines 14 2026-07-24
AAR231 - 14 2026-06-30
AAR602 Asiana Airlines 13 2026-07-25
AAR561 - 13 2026-06-28
AAR729 Asiana Airlines 9 2026-07-21
AAR730 - 8 2026-07-21
AAR704 - 7 2026-07-14
AAR703 - 7 2026-07-14
AAR733 - 6 2026-07-20
AAR734 Asiana Airlines 5 2026-07-20
AAR546 Asiana Airlines 5 2026-07-26
AAR545 Asiana Airlines 4 2026-07-26
AAR334 Asiana Airlines 4 2026-05-17
AAR711 - 3 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAR546 PRG → ICN Jul 26, 17:10 UTCJul 26, 20:30 UTC3h 20m
2026-07-26 AAR545 ICN → PRG Jul 26, 02:10 UTCJul 26, 14:15 UTC12h 6m
2026-07-25 AAR602 SYD → ICN Jul 25, 11:35 UTCJul 25, 21:55 UTC10h 20m
2026-07-24 AAR601 ICN → SYD Jul 24, 23:20 UTCJul 25, 09:15 UTC9h 55m
2026-07-24 AAR714 - Jul 24, 09:40 UTCJul 24, 11:45 UTC2h 5m
2026-07-24 AAR713 ICN → TPE Jul 24, 06:05 UTCJul 24, 08:15 UTC2h 10m
2026-07-24 AAR302 - Jul 24, 04:00 UTCJul 24, 04:20 UTC20m
2026-07-24 AAR301 - Jul 24, 00:55 UTCJul 24, 01:20 UTC25m
2026-07-23 AAR602 SYD → ICN Jul 23, 11:40 UTCJul 23, 22:00 UTC10h 20m
2026-07-22 AAR601 ICN → SYD Jul 22, 23:25 UTCJul 23, 09:15 UTC9h 50m
2026-07-22 AAR271 - Jul 22, 16:10 UTCJul 22, 18:25 UTC2h 15m
2026-07-21 AAR272 ICN → SEA Jul 21, 13:05 UTCJul 21, 22:50 UTC9h 45m
2026-07-21 AAR730 - Jul 21, 10:05 UTCJul 21, 10:45 UTC40m
2026-07-21 AAR730 - Jul 21, 06:50 UTCJul 21, 07:00 UTC10m
2026-07-21 AAR729 PUS → SGN Jul 21, 04:30 UTCJul 21, 04:55 UTC25m
2026-07-21 AAR729 PUS → SGN Jul 21, 01:00 UTCJul 21, 01:45 UTC45m
2026-07-20 AAR734 HAN → ICN Jul 20, 19:55 UTCJul 20, 20:40 UTC45m
2026-07-20 AAR733 - Jul 20, 10:50 UTCJul 20, 11:30 UTC40m
2026-07-20 AAR546 - Jul 20, 03:05 UTCJul 20, 03:30 UTC25m
2026-07-19 AAR546 - Jul 19, 17:05 UTCJul 20, 02:15 UTC9h 10m
2026-07-19 AAR545 - Jul 19, 02:10 UTCJul 19, 14:45 UTC12h 35m
2026-07-18 AAR734 HAN → ICN Jul 18, 20:05 UTCJul 18, 20:45 UTC40m
2026-07-18 AAR733 - Jul 18, 14:15 UTCJul 18, 14:25 UTC10m
2026-07-18 AAR733 - Jul 18, 11:00 UTCJul 18, 11:45 UTC45m
2026-07-18 AAR712 TPE → ICN Jul 18, 04:50 UTCJul 18, 07:00 UTC2h 10m
2026-07-18 AAR711 - Jul 18, 01:50 UTCJul 18, 02:05 UTC15m
2026-07-18 AAR711 - Jul 18, 00:10 UTCJul 18, 00:55 UTC45m
2026-07-14 AAR704 - Jul 14, 16:20 UTCJul 14, 19:45 UTC3h 25m
2026-07-14 AAR703 - Jul 14, 11:30 UTCJul 14, 14:50 UTC3h 20m
2026-07-14 AAR173 - Jul 14, 05:45 UTCJul 14, 08:05 UTC2h 20m
2026-07-14 AAR174 - Jul 14, 01:45 UTCJul 14, 04:05 UTC2h 20m
2026-07-13 AAR734 - Jul 13, 20:00 UTCJul 13, 20:45 UTC45m
2026-07-13 AAR733 - Jul 13, 14:10 UTCJul 13, 14:20 UTC10m
2026-07-13 AAR733 - Jul 13, 10:50 UTCJul 13, 11:30 UTC40m
2026-07-13 AAR546 - Jul 13, 03:25 UTCJul 13, 03:45 UTC20m
2026-07-12 AAR546 - Jul 12, 17:10 UTCJul 13, 02:30 UTC9h 20m
2026-07-12 AAR545 - Jul 12, 03:20 UTCJul 12, 14:30 UTC11h 10m
2026-07-12 AAR545 - Jul 12, 02:10 UTCJul 12, 02:35 UTC25m
2026-07-11 AAR734 - Jul 11, 20:10 UTCJul 11, 20:30 UTC20m
2026-07-11 AAR734 - Jul 11, 16:50 UTCJul 11, 17:00 UTC10m
2026-07-11 AAR733 - Jul 11, 10:55 UTCJul 11, 11:40 UTC45m
2026-07-10 AAR552 - Jul 10, 23:35 UTCJul 10, 23:55 UTC20m
2026-07-10 AAR552 - Jul 10, 14:55 UTCJul 10, 22:40 UTC7h 45m
2026-07-10 AAR551 - Jul 10, 12:30 UTCJul 10, 12:50 UTC20m
2026-07-10 AAR551 - Jul 10, 01:45 UTCJul 10, 11:50 UTC10h 5m
2026-07-09 AAR714 - Jul 9, 09:10 UTCJul 9, 11:20 UTC2h 10m
2026-07-09 AAR713 ICN → TPE Jul 9, 05:25 UTCJul 9, 07:35 UTC2h 10m
2026-07-09 AAR552 - Jul 9, 00:15 UTCJul 9, 00:35 UTC20m
2026-07-08 AAR552 - Jul 8, 15:40 UTCJul 8, 23:25 UTC7h 45m
2026-07-08 AAR551 - Jul 8, 13:15 UTCJul 8, 13:30 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 HL7732 page for operator, model, and routing details .

Mode-S 71BF32 frequently asked

What is Mode-S code 71BF32?
71BF32 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7732.
Where is Mode-S 71BF32 registered?
Mode-S code 71BF32 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 71BF32 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF32, octal 34337462, decimal 7,454,514.
What flights does 71BF32 operate?
Mode-S 71BF32 has broadcast 20 distinct callsigns, including AAR551, AAR552, AAR232, AAR271, AAR562.