Apparatus

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sensors Mode-S transponder

71C584

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

Currently assigned to HL8584 · AIRBUS A-321neo

Hex
71C584
Octal
34342604
Decimal
7,456,132
Country
KR
Tail
HL8584
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
187
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C584.

Country allocation

The ICAO 24-bit address 71C584 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
AAR332 Asiana Airlines 11 2026-05-27
AAR173 Asiana Airlines 8 2026-05-28
AAR352 Asiana Airlines 7 2026-05-29
AAR353 Asiana Airlines 6 2026-05-26
AAR351 Asiana Airlines 6 2026-05-29
AAR347 Asiana Airlines 6 2026-05-07
AAR331 Asiana Airlines 6 2026-05-25
AAR174 Asiana Airlines 6 2026-05-28
AAR740 Asiana Airlines 5 2026-05-17
AAR367 Asiana Airlines 5 2026-05-05
AAR354 Asiana Airlines 5 2026-05-26
AAR350 Asiana Airlines 5 2026-05-14
AAR348 Asiana Airlines 5 2026-05-04
AAR172 Asiana Airlines 5 2026-05-10
AAR171 Asiana Airlines 5 2026-05-22
AAR739 Asiana Airlines 4 2026-05-04
AAR349 Asiana Airlines 4 2026-05-14
AAR336 Asiana Airlines 4 2026-05-26
AAR327 Asiana Airlines 4 2026-05-22
AAR324 Asiana Airlines 4 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AAR339 ICN → HRB May 30, 03:35 UTCMay 30, 04:00 UTC25m
2026-05-30 AAR131 FUK → ICN May 30, 00:45 UTCMay 30, 01:50 UTC1h 5m
2026-05-29 AAR132 ICN → FUK May 29, 21:45 UTCMay 29, 22:10 UTC25m
2026-05-29 AAR352 YNJ → ICN May 29, 11:25 UTCMay 29, 11:45 UTC20m
2026-05-29 AAR351 ICN → YNJ May 29, 06:40 UTCMay 29, 07:00 UTC20m
2026-05-29 AAR157 KMI → ICN May 29, 03:55 UTCMay 29, 05:00 UTC1h 5m
2026-05-29 AAR158 ICN → KMI May 29, 01:10 UTCMay 29, 02:00 UTC50m
2026-05-28 AAR324 TFU → ICN May 28, 19:05 UTCMay 28, 19:25 UTC20m
2026-05-28 AAR323 ICN → TFU May 28, 11:35 UTCMay 28, 18:25 UTC6h 50m
2026-05-28 AAR173 CTS → ICN May 28, 05:50 UTCMay 28, 08:30 UTC2h 40m
2026-05-28 AAR174 ICN → CTS May 28, 01:35 UTCMay 28, 03:50 UTC2h 15m
2026-05-27 AAR708 CRK → ICN May 27, 18:10 UTCMay 27, 21:40 UTC3h 30m
2026-05-27 AAR707 ICN → CRK May 27, 13:15 UTCMay 27, 16:45 UTC3h 30m
2026-05-27 AAR332 PEK → ICN May 27, 04:04 UTCMay 27, 04:24 UTC20m
2026-05-26 AAR354 CKG → ICN May 26, 20:45 UTCMay 26, 21:04 UTC20m
2026-05-26 AAR353 ICN → CKG May 26, 13:24 UTCMay 26, 19:55 UTC6h 30m
2026-05-26 AAR336 PEK → ICN May 26, 10:34 UTCMay 26, 11:00 UTC25m
2026-05-26 AAR336 PEK → ICN May 26, 09:35 UTCMay 26, 09:45 UTC10m
2026-05-26 AAR335 ICN → PEK May 26, 06:25 UTCMay 26, 06:44 UTC20m
2026-05-26 AAR332 PEK → ICN May 26, 04:10 UTCMay 26, 04:35 UTC25m
2026-05-26 AAR332 PEK → ICN May 26, 03:05 UTCMay 26, 03:15 UTC10m
2026-05-25 AAR331 ICN → PEK May 25, 23:49 UTCMay 26, 00:09 UTC20m
2026-05-25 AAR352 YNJ → ICN May 25, 11:45 UTCMay 25, 12:10 UTC25m
2026-05-25 AAR351 ICN → YNJ May 25, 06:50 UTCMay 25, 07:15 UTC25m
2026-05-25 AAR332 PEK → ICN May 25, 04:00 UTCMay 25, 04:20 UTC20m
2026-05-24 AAR331 ICN → PEK May 24, 23:30 UTCMay 24, 23:35 UTC5m
2026-05-24 AAR105 NRT → ICN May 24, 11:00 UTCMay 24, 13:00 UTC2h 0m
2026-05-24 AAR106 ICN → NRT May 24, 07:05 UTCMay 24, 08:55 UTC1h 50m
2026-05-24 AAR304 CGQ → ICN May 24, 05:05 UTCMay 24, 05:25 UTC20m
2026-05-24 AAR303 ICN → CGQ May 24, 00:35 UTCMay 24, 01:00 UTC25m
2026-05-23 AAR354 CKG → ICN May 23, 21:15 UTCMay 23, 21:35 UTC20m
2026-05-23 AAR353 ICN → CKG May 23, 13:25 UTCMay 23, 13:45 UTC20m
2026-05-23 AAR336 PEK → ICN May 23, 10:05 UTCMay 23, 10:30 UTC25m
2026-05-23 AAR335 ICN → PEK May 23, 06:10 UTCMay 23, 06:30 UTC20m
2026-05-23 AAR332 PEK → ICN May 23, 04:00 UTCMay 23, 04:20 UTC20m
2026-05-22 AAR331 ICN → PEK May 22, 23:55 UTCMay 23, 00:20 UTC25m
2026-05-22 AAR354 CKG → ICN May 22, 21:05 UTCMay 22, 21:25 UTC20m
2026-05-22 AAR353 ICN → CKG May 22, 13:20 UTCMay 22, 13:40 UTC20m
2026-05-22 AAR171 OKA → ICN May 22, 06:05 UTCMay 22, 11:35 UTC5h 29m
2026-05-22 AAR328 TSN → ICN May 22, 04:05 UTCMay 22, 04:25 UTC20m
2026-05-22 AAR327 ICN → TSN May 22, 00:10 UTCMay 22, 00:35 UTC25m
2026-05-21 AAR322 CSX → ICN May 21, 12:25 UTCMay 21, 19:30 UTC7h 5m
2026-05-21 AAR103 NRT → ICN May 21, 07:50 UTCMay 21, 09:50 UTC2h 0m
2026-05-21 AAR104 ICN → NRT May 21, 03:35 UTCMay 21, 05:30 UTC1h 55m
2026-05-21 AAR104 ICN → NRT May 21, 02:40 UTCMay 21, 02:45 UTC5m
2026-05-21 AAR131 FUK → ICN May 21, 01:00 UTCMay 21, 02:10 UTC1h 10m
2026-05-20 AAR132 ICN → FUK May 20, 21:50 UTCMay 20, 22:20 UTC30m
2026-05-20 AAR352 YNJ → ICN May 20, 06:40 UTCMay 20, 11:50 UTC5h 10m
2026-05-20 AAR332 PEK → ICN May 20, 04:35 UTCMay 20, 05:00 UTC26m
2026-05-20 AAR332 PEK → ICN May 20, 03:25 UTCMay 20, 03:40 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 HL8584 page for operator, model, and routing details .

Mode-S 71C584 frequently asked

What is Mode-S code 71C584?
71C584 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8584.
Where is Mode-S 71C584 registered?
Mode-S code 71C584 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 71C584 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C584, octal 34342604, decimal 7,456,132.
What flights does 71C584 operate?
Mode-S 71C584 has broadcast 20 distinct callsigns, including AAR332, AAR173, AAR352, AAR353, AAR351.