Apparatus

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sensors Mode-S transponder

71C039

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

Currently assigned to HL8039 · AIRBUS A-321

Hex
71C039
Octal
34340071
Decimal
7,454,777
Country
KR
Tail
HL8039
Type
A321
Transponder active on ground
Flights observed
258
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C039.

Country allocation

The ICAO 24-bit address 71C039 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
AAR323 - 24 2026-07-04
AAR324 - 23 2026-07-04
AAR3365 - 19 2026-07-09
AAR1145 - 16 2026-07-08
AAR3355 - 15 2026-07-09
AAR1135 - 15 2026-07-09
AAR339 - 14 2026-06-27
AAR340 - 13 2026-06-27
AAR151 - 9 2026-07-07
AAR334 - 8 2026-06-30
AAR349 - 7 2026-07-14
AAR152 - 7 2026-07-07
AAR351 - 5 2026-07-08
AAR350 - 5 2026-07-14
AAR333 - 5 2026-06-30
AAR352 - 3 2026-07-08
AAR134 - 3 2026-06-23
AAR133 - 3 2026-06-23
AAR118 - 3 2026-07-14
AAR114 - 3 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAR118 - Jul 14, 12:00 UTCJul 14, 12:15 UTC15m
2026-07-14 AAR350 - Jul 14, 08:20 UTCJul 14, 08:45 UTC25m
2026-07-14 AAR349 - Jul 14, 03:55 UTCJul 14, 04:35 UTC40m
2026-07-11 AAR105 - Jul 11, 11:10 UTCJul 11, 13:05 UTC1h 55m
2026-07-11 AAR106 - Jul 11, 07:00 UTCJul 11, 09:05 UTC2h 5m
2026-07-10 AAR117 KIX → ICN Jul 10, 15:30 UTCJul 10, 16:55 UTC1h 25m
2026-07-10 AAR118 ICN → KIX Jul 10, 11:50 UTCJul 10, 13:15 UTC1h 25m
2026-07-10 AAR349 ICN → ICN Jul 10, 04:00 UTCJul 10, 09:00 UTC5h 0m
2026-07-10 AAR804A GMP → ICN Jul 10, 01:20 UTCJul 10, 01:40 UTC20m
2026-07-09 AAR3365 - Jul 9, 10:40 UTCJul 9, 11:00 UTC20m
2026-07-09 AAR3355 - Jul 9, 06:30 UTCJul 9, 06:55 UTC25m
2026-07-09 AAR1135 KIX → GMP Jul 9, 02:35 UTCJul 9, 03:55 UTC1h 20m
2026-07-08 AAR1145 GMP → KIX Jul 8, 23:35 UTCJul 9, 01:00 UTC1h 25m
2026-07-08 AAR801A ICN → GMP Jul 8, 22:10 UTCJul 8, 22:20 UTC10m
2026-07-08 AAR352 - Jul 8, 11:50 UTCJul 8, 12:15 UTC25m
2026-07-08 AAR351 - Jul 8, 07:00 UTCJul 8, 11:05 UTC4h 5m
2026-07-08 AAR111 KIX → ICN Jul 8, 01:45 UTCJul 8, 03:10 UTC1h 25m
2026-07-07 AAR112 ICN → KIX Jul 7, 22:15 UTCJul 7, 23:35 UTC1h 20m
2026-07-07 AAR378 - Jul 7, 14:15 UTCJul 7, 14:35 UTC20m
2026-07-07 AAR377 - Jul 7, 10:25 UTCJul 7, 10:50 UTC25m
2026-07-07 AAR151 - Jul 7, 04:05 UTCJul 7, 05:55 UTC1h 50m
2026-07-07 AAR152 - Jul 7, 00:45 UTCJul 7, 02:20 UTC1h 35m
2026-07-06 AAR352 - Jul 6, 11:25 UTCJul 6, 11:45 UTC20m
2026-07-06 AAR351 - Jul 6, 06:40 UTCJul 6, 07:05 UTC25m
2026-07-05 AAR113 KIX → ICN Jul 5, 11:05 UTCJul 5, 12:30 UTC1h 25m
2026-07-05 AAR114 ICN → KIX Jul 5, 08:10 UTCJul 5, 09:35 UTC1h 25m
2026-07-05 AAR151 - Jul 5, 05:40 UTCJul 5, 06:15 UTC35m
2026-07-05 AAR151 - Jul 5, 04:10 UTCJul 5, 05:10 UTC1h 0m
2026-07-05 AAR152 - Jul 5, 00:55 UTCJul 5, 02:25 UTC1h 30m
2026-07-04 AAR324 - Jul 4, 19:35 UTCJul 4, 19:55 UTC20m
2026-07-04 AAR323 - Jul 4, 11:25 UTCJul 4, 11:45 UTC20m
2026-07-04 AAR350 - Jul 4, 08:20 UTCJul 4, 08:50 UTC30m
2026-07-04 AAR349 - Jul 4, 03:55 UTCJul 4, 04:20 UTC25m
2026-07-03 AAR117 - Jul 3, 15:25 UTCJul 3, 16:50 UTC1h 25m
2026-07-03 AAR118 - Jul 3, 12:05 UTCJul 3, 13:20 UTC1h 15m
2026-07-03 AAR363 ICN → ICN Jul 3, 02:10 UTCJul 3, 07:40 UTC5h 30m
2026-07-02 AAR378 - Jul 2, 12:55 UTCJul 2, 13:15 UTC20m
2026-07-02 AAR377 - Jul 2, 10:15 UTCJul 2, 10:40 UTC25m
2026-07-01 AAR113 KIX → ICN Jul 1, 11:15 UTCJul 1, 12:45 UTC1h 30m
2026-07-01 AAR114 ICN → KIX Jul 1, 08:15 UTCJul 1, 09:35 UTC1h 20m
2026-07-01 AAR151 - Jul 1, 04:05 UTCJul 1, 06:10 UTC2h 5m
2026-07-01 AAR152 - Jul 1, 00:50 UTCJul 1, 02:25 UTC1h 35m
2026-06-30 AAR324 - Jun 30, 19:35 UTCJun 30, 19:55 UTC20m
2026-06-30 AAR323 - Jun 30, 11:30 UTCJun 30, 18:45 UTC7h 15m
2026-06-30 AAR334 - Jun 30, 08:45 UTCJun 30, 09:10 UTC25m
2026-06-30 AAR334 - Jun 30, 07:45 UTCJun 30, 07:55 UTC10m
2026-06-30 AAR333 - Jun 30, 04:35 UTCJun 30, 04:55 UTC20m
2026-06-29 AAR323 ICN → ICN Jun 29, 11:25 UTCJun 29, 19:29 UTC8h 5m
2026-06-29 AAR151 - Jun 29, 04:04 UTCJun 29, 05:59 UTC1h 55m
2026-06-29 AAR152 - Jun 29, 01:00 UTCJun 29, 02:35 UTC1h 35m

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 HL8039 page for operator, model, and routing details .

Mode-S 71C039 frequently asked

What is Mode-S code 71C039?
71C039 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8039.
Where is Mode-S 71C039 registered?
Mode-S code 71C039 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 71C039 broadcasting right now?
Mode-S 71C039 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C039, octal 34340071, decimal 7,454,777.
What flights does 71C039 operate?
Mode-S 71C039 has broadcast 20 distinct callsigns, including AAR323, AAR324, AAR3365, AAR1145, AAR3355.