Apparatus

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sensors Mode-S transponder

71C510

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

Currently assigned to HL8510 · AIRBUS A-321neo

Hex
71C510
Octal
34342420
Decimal
7,456,016
Country
KR
Tail
HL8510
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
196
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C510.

Country allocation

The ICAO 24-bit address 71C510 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
AAR172 Asiana Airlines 25 2026-05-30
AAR171 Asiana Airlines 21 2026-05-30
AAR327 Asiana Airlines 15 2026-05-30
AAR106 Asiana Airlines 11 2026-05-17
AAR105 Asiana Airlines 11 2026-05-17
AAR328 Asiana Airlines 10 2026-05-30
AAR303 Asiana Airlines 9 2026-05-17
AAR707 Asiana Airlines 7 2026-05-23
AAR708 Asiana Airlines 6 2026-05-23
AAR354 Asiana Airlines 6 2026-05-28
AAR353 Asiana Airlines 6 2026-05-28
AAR567 Asiana Airlines 4 2026-04-27
AAR332 Asiana Airlines 4 2026-04-28
AAR304 Asiana Airlines 4 2026-05-17
AAR739 Asiana Airlines 3 2026-05-15
AAR174 Asiana Airlines 3 2026-05-24
AAR173 Asiana Airlines 3 2026-05-24
AAR118 Asiana Airlines 3 2026-04-24
AAR721 Asiana Airlines 2 2026-05-04
AAR568 Asiana Airlines 2 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AAR171 OKA → ICN May 30, 10:55 UTCMay 30, 11:35 UTC40m
2026-05-30 AAR172 ICN → OKA May 30, 06:10 UTCMay 30, 06:35 UTC25m
2026-05-30 AAR328 TSN → ICN May 30, 04:00 UTCMay 30, 04:20 UTC20m
2026-05-30 AAR327 ICN → TSN May 30, 00:15 UTCMay 30, 00:40 UTC25m
2026-05-28 AAR354 CKG → ICN May 28, 21:05 UTCMay 28, 21:25 UTC20m
2026-05-28 AAR353 ICN → CKG May 28, 13:15 UTCMay 28, 20:20 UTC7h 5m
2026-05-28 AAR171 OKA → ICN May 28, 06:20 UTCMay 28, 11:25 UTC5h 5m
2026-05-28 AAR328 TSN → ICN May 28, 04:20 UTCMay 28, 04:45 UTC25m
2026-05-28 AAR327 ICN → TSN May 28, 00:25 UTCMay 28, 00:45 UTC20m
2026-05-27 AAR354 CKG → ICN May 27, 20:55 UTCMay 27, 21:20 UTC25m
2026-05-27 AAR353 ICN → CKG May 27, 13:25 UTCMay 27, 13:45 UTC20m
2026-05-27 AAR172 ICN → OKA May 27, 06:20 UTCMay 27, 11:10 UTC4h 51m
2026-05-27 AAR302 - May 27, 03:59 UTCMay 27, 04:19 UTC20m
2026-05-27 AAR301 - May 27, 01:05 UTCMay 27, 01:29 UTC25m
2026-05-26 AAR171 OKA → ICN May 26, 06:14 UTCMay 26, 11:34 UTC5h 20m
2026-05-26 AAR328 TSN → ICN May 26, 04:15 UTCMay 26, 04:35 UTC20m
2026-05-26 AAR327 ICN → TSN May 26, 00:19 UTCMay 26, 00:35 UTC15m
2026-05-25 AAR321 ICN → CSX May 25, 12:30 UTCMay 25, 19:40 UTC7h 9m
2026-05-25 AAR334 PEK → ICN May 25, 08:50 UTCMay 25, 09:15 UTC25m
2026-05-25 AAR333 ICN → PEK May 25, 04:25 UTCMay 25, 04:50 UTC25m
2026-05-25 AAR131 FUK → ICN May 25, 01:55 UTCMay 25, 02:00 UTC5m
2026-05-24 AAR173 CTS → ICN May 24, 05:45 UTCMay 24, 08:20 UTC2h 35m
2026-05-24 AAR174 ICN → CTS May 24, 01:35 UTCMay 24, 03:55 UTC2h 20m
2026-05-23 AAR708 CRK → ICN May 23, 18:10 UTCMay 23, 21:30 UTC3h 20m
2026-05-23 AAR707 ICN → CRK May 23, 13:25 UTCMay 23, 16:40 UTC3h 15m
2026-05-23 AAR172 ICN → OKA May 23, 06:15 UTCMay 23, 11:25 UTC5h 10m
2026-05-23 AAR328 TSN → ICN May 23, 04:05 UTCMay 23, 04:25 UTC20m
2026-05-23 AAR327 ICN → TSN May 23, 00:15 UTCMay 23, 00:40 UTC25m
2026-05-22 AAR352 YNJ → ICN May 22, 11:20 UTCMay 22, 11:45 UTC26m
2026-05-22 AAR351 ICN → YNJ May 22, 06:30 UTCMay 22, 07:00 UTC30m
2026-05-22 AAR157 KMI → ICN May 22, 03:55 UTCMay 22, 05:00 UTC1h 5m
2026-05-22 AAR158 ICN → KMI May 22, 00:50 UTCMay 22, 01:45 UTC55m
2026-05-21 AAR708 CRK → ICN May 21, 18:15 UTCMay 21, 21:50 UTC3h 35m
2026-05-21 AAR707 ICN → CRK May 21, 13:15 UTCMay 21, 16:40 UTC3h 25m
2026-05-21 AAR171 OKA → ICN May 21, 06:05 UTCMay 21, 11:30 UTC5h 25m
2026-05-21 AAR328 TSN → ICN May 21, 04:15 UTCMay 21, 04:30 UTC15m
2026-05-21 AAR327 ICN → TSN May 21, 00:15 UTCMay 21, 00:40 UTC25m
2026-05-20 AAR708 CRK → ICN May 20, 18:20 UTCMay 20, 21:50 UTC3h 30m
2026-05-20 AAR707 ICN → CRK May 20, 13:30 UTCMay 20, 16:55 UTC3h 25m
2026-05-20 AAR171 OKA → ICN May 20, 10:45 UTCMay 20, 11:25 UTC40m
2026-05-20 AAR171 OKA → ICN May 20, 09:30 UTCMay 20, 09:40 UTC10m
2026-05-20 AAR172 ICN → OKA May 20, 06:15 UTCMay 20, 08:05 UTC1h 50m
2026-05-20 AAR328 TSN → ICN May 20, 04:15 UTCMay 20, 04:35 UTC20m
2026-05-20 AAR327 ICN → TSN May 20, 00:30 UTCMay 20, 00:50 UTC20m
2026-05-17 AAR105 NRT → ICN May 17, 10:55 UTCMay 17, 12:50 UTC1h 55m
2026-05-17 AAR106 ICN → NRT May 17, 07:00 UTCMay 17, 09:05 UTC2h 5m
2026-05-17 AAR304 CGQ → ICN May 17, 05:05 UTCMay 17, 05:30 UTC25m
2026-05-17 AAR303 ICN → CGQ May 17, 00:25 UTCMay 17, 00:50 UTC25m
2026-05-16 AAR105 NRT → ICN May 16, 11:05 UTCMay 16, 12:55 UTC1h 50m
2026-05-16 AAR106 ICN → NRT May 16, 07:05 UTCMay 16, 09:10 UTC2h 5m

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 HL8510 page for operator, model, and routing details .

Mode-S 71C510 frequently asked

What is Mode-S code 71C510?
71C510 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8510.
Where is Mode-S 71C510 registered?
Mode-S code 71C510 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 71C510 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 71C510, octal 34342420, decimal 7,456,016.
What flights does 71C510 operate?
Mode-S 71C510 has broadcast 20 distinct callsigns, including AAR172, AAR171, AAR327, AAR106, AAR105.