Apparatus

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sensors Mode-S transponder

71C381

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

Currently assigned to HL8381 · AIRBUS A-350-900

Hex
71C381
Octal
34341601
Decimal
7,455,617
Country
KR
Tail
HL8381
Type
A359
Broadcasting now · callsign AAR521 · 22,850 ft
Flights observed
112
Distinct callsigns
20
Country
KR
Last broadcast
4h ago

Current position

71C381 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C381 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
AAR752 Asiana Airlines 7 2026-06-24
AAR751 - 7 2026-06-24
AAR222 - 5 2026-06-19
AAR221 - 5 2026-06-19
AAR204 - 5 2026-06-17
AAR203 Asiana Airlines 5 2026-06-18
AAR548 - 4 2026-06-27
AAR547 - 4 2026-06-26
AAR512 Asiana Airlines 4 2026-06-04
AAR502 Asiana Airlines 4 2026-06-02
AAR761 Asiana Airlines 3 2026-05-26
AAR511 Asiana Airlines 3 2026-06-03
AAR116 - 3 2026-06-28
AAR115 - 3 2026-06-29
AAR112 Asiana Airlines 3 2026-06-12
AAR762 Asiana Airlines 2 2026-05-26
AAR733 - 2 2026-06-29
AAR711 - 2 2026-06-25
AAR582 - 2 2026-06-28
AAR581 - 2 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-04 AAR211 SFO → ICN Jul 4, 06:55 UTCJul 4, 18:35 UTC11h 40m
2026-07-03 AAR212 ICN → SFO Jul 3, 14:05 UTCJul 3, 23:50 UTC9h 45m
2026-07-03 AAR562 FCO → ICN Jul 3, 06:20 UTCJul 3, 06:40 UTC20m
2026-07-02 AAR562 FCO → ICN Jul 2, 20:00 UTCJul 3, 05:30 UTC9h 30m
2026-07-02 AAR561 - Jul 2, 13:30 UTCJul 2, 17:30 UTC4h 0m
2026-07-02 AAR561 - Jul 2, 05:15 UTCJul 2, 05:30 UTC15m
2026-07-01 AAR742 - Jul 1, 21:15 UTCJul 2, 00:05 UTC2h 50m
2026-07-01 AAR741 - Jul 1, 10:55 UTCJul 1, 13:25 UTC2h 30m
2026-06-30 AAR201 LAX → ICN Jun 30, 17:30 UTCJul 1, 06:15 UTC12h 45m
2026-06-30 AAR202 ICN → LAX Jun 30, 04:20 UTCJun 30, 14:40 UTC10h 20m
2026-06-29 AAR734 - Jun 29, 17:19 UTCJun 29, 20:49 UTC3h 30m
2026-06-29 AAR733 - Jun 29, 11:25 UTCJun 29, 15:24 UTC4h 0m
2026-06-29 AAR115 KIX → ICN Jun 29, 00:29 UTCJun 29, 01:50 UTC1h 20m
2026-06-28 AAR116 ICN → KIX Jun 28, 10:35 UTCJun 28, 11:55 UTC1h 20m
2026-06-28 AAR582 - Jun 28, 07:40 UTCJun 28, 08:00 UTC20m
2026-06-27 AAR582 - Jun 27, 20:59 UTCJun 28, 06:49 UTC9h 50m
2026-06-27 AAR581 - Jun 27, 07:19 UTCJun 27, 19:05 UTC11h 45m
2026-06-27 AAR581 - Jun 27, 06:09 UTCJun 27, 06:25 UTC15m
2026-06-27 AAR548 - Jun 27, 03:44 UTCJun 27, 04:09 UTC25m
2026-06-26 AAR548 - Jun 26, 18:24 UTCJun 27, 02:59 UTC8h 35m
2026-06-26 AAR547 - Jun 26, 05:24 UTCJun 26, 16:05 UTC10h 40m
2026-06-26 AAR547 - Jun 26, 04:14 UTCJun 26, 04:24 UTC10m
2026-06-26 AAR115 KIX → ICN Jun 26, 00:39 UTCJun 26, 02:00 UTC1h 20m
2026-06-25 AAR116 ICN → KIX Jun 25, 10:35 UTCJun 25, 11:59 UTC1h 25m
2026-06-25 AAR712 - Jun 25, 04:40 UTCJun 25, 06:40 UTC2h 0m
2026-06-25 AAR711 - Jun 25, 01:40 UTCJun 25, 01:59 UTC20m
2026-06-24 AAR711 - Jun 24, 23:59 UTCJun 25, 00:35 UTC35m
2026-06-24 AAR752 SIN → ICN Jun 24, 18:39 UTCJun 24, 21:44 UTC3h 5m
2026-06-24 AAR752 SIN → ICN Jun 24, 15:35 UTCJun 24, 15:44 UTC10m
2026-06-24 AAR751 - Jun 24, 07:40 UTCJun 24, 13:05 UTC5h 25m
2026-06-24 AAR542 - Jun 24, 04:30 UTCJun 24, 04:59 UTC30m
2026-06-23 AAR542 - Jun 23, 18:10 UTCJun 24, 03:40 UTC9h 30m
2026-06-23 AAR541 - Jun 23, 03:39 UTCJun 23, 15:40 UTC12h 0m
2026-06-23 AAR541 - Jun 23, 02:24 UTCJun 23, 02:40 UTC15m
2026-06-22 AAR105 - Jun 22, 11:00 UTCJun 22, 12:59 UTC2h 0m
2026-06-22 AAR106 ICN → NRT Jun 22, 07:00 UTCJun 22, 09:00 UTC2h 0m
2026-06-22 AAR548 - Jun 22, 04:00 UTCJun 22, 04:19 UTC20m
2026-06-21 AAR548 - Jun 21, 18:25 UTCJun 22, 03:14 UTC8h 50m
2026-06-21 AAR547 - Jun 21, 05:30 UTCJun 21, 16:30 UTC11h 0m
2026-06-21 AAR547 - Jun 21, 04:14 UTCJun 21, 04:24 UTC10m
2026-06-20 AAR752 SIN → ICN Jun 20, 18:04 UTCJun 20, 21:14 UTC3h 10m
2026-06-20 AAR752 SIN → ICN Jun 20, 15:19 UTCJun 20, 15:29 UTC10m
2026-06-20 AAR751 - Jun 20, 13:14 UTCJun 20, 13:24 UTC10m
2026-06-20 AAR751 - Jun 20, 08:05 UTCJun 20, 10:44 UTC2h 40m
2026-06-19 AAR221 JFK → ICN Jun 19, 16:09 UTCJun 20, 06:05 UTC13h 55m
2026-06-19 AAR222 ICN → JFK Jun 19, 00:05 UTCJun 19, 13:29 UTC13h 24m
2026-06-18 AAR203 LAX → ICN Jun 18, 06:15 UTCJun 18, 17:45 UTC11h 30m
2026-06-17 AAR204 ICN → LAX Jun 17, 13:00 UTCJun 18, 00:05 UTC11h 5m
2026-06-16 AAR221 JFK → ICN Jun 16, 16:05 UTCJun 17, 06:35 UTC14h 31m
2026-06-15 AAR222 - Jun 15, 23:50 UTCJun 16, 12:50 UTC13h 0m

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 HL8381 page for operator, model, and routing details .

Mode-S 71C381 frequently asked

What is Mode-S code 71C381?
71C381 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8381.
Where is Mode-S 71C381 registered?
Mode-S code 71C381 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 71C381 broadcasting right now?
Yes. Mode-S 71C381 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C381, octal 34341601, decimal 7,455,617.
What flights does 71C381 operate?
Mode-S 71C381 has broadcast 20 distinct callsigns, including AAR752, AAR751, AAR222, AAR221, AAR204.