Apparatus

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sensors Mode-S transponder

71C004

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

Currently assigned to HL8004 · AIRBUS A-321

Hex
71C004
Octal
34340004
Decimal
7,454,724
Country
KR
Tail
HL8004
Type
A321
No current signal · last broadcast 9h ago
Flights observed
306
Distinct callsigns
20
Country
KR
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 71C004.

Country allocation

The ICAO 24-bit address 71C004 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
AAR8936 Asiana Airlines 14 2026-05-30
AAR8708 Asiana Airlines 14 2026-05-30
AAR8985 Asiana Airlines 12 2026-05-30
AAR8900 Asiana Airlines 12 2026-05-26
AAR8707 Asiana Airlines 12 2026-05-30
AAR8921 Asiana Airlines 11 2026-05-14
AAR8993 Asiana Airlines 8 2026-05-26
AAR8953 Asiana Airlines 8 2026-05-20
AAR8948 Asiana Airlines 7 2026-05-19
AAR8904 Asiana Airlines 7 2026-05-19
AAR8901 Asiana Airlines 7 2026-05-18
AAR8736 Asiana Airlines 7 2026-05-19
AAR8735 Asiana Airlines 7 2026-05-19
AAR8704 Asiana Airlines 7 2026-05-20
AAR8703 Asiana Airlines 7 2026-05-20
AAR8996 Asiana Airlines 6 2026-05-18
AAR8980 Asiana Airlines 6 2026-05-27
AAR8973 Asiana Airlines 6 2026-05-27
AAR8949 Asiana Airlines 6 2026-05-18
AAR8927 Asiana Airlines 6 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AAR8985 GMP → CJU May 30, 10:35 UTCMay 30, 11:00 UTC25m
2026-05-30 AAR8708 KWJ → GMP May 30, 08:30 UTCMay 30, 09:10 UTC40m
2026-05-30 AAR8707 GMP → KWJ May 30, 06:55 UTCMay 30, 07:15 UTC20m
2026-05-30 AAR8936 CJU → GMP May 30, 05:20 UTCMay 30, 05:55 UTC35m
2026-05-30 AAR8935 GMP → CJU May 30, 02:10 UTCMay 30, 02:35 UTC25m
2026-05-30 AAR8734 RSU → GMP May 30, 00:00 UTCMay 30, 00:40 UTC40m
2026-05-29 AAR8733 GMP → RSU May 29, 22:25 UTCMay 29, 22:50 UTC25m
2026-05-29 AAR8994 CJU → GMP May 29, 12:25 UTCMay 29, 12:55 UTC30m
2026-05-29 AAR8941 GMP → CJU May 29, 02:40 UTCMay 29, 03:05 UTC25m
2026-05-29 AAR8914 CJU → GMP May 29, 00:25 UTCMay 29, 00:55 UTC30m
2026-05-28 AAR8913 GMP → CJU May 28, 21:55 UTCMay 28, 22:20 UTC25m
2026-05-28 AAR3365 PEK → GMP May 28, 10:40 UTCMay 28, 11:05 UTC25m
2026-05-28 AAR3365 PEK → GMP May 28, 09:45 UTCMay 28, 09:55 UTC10m
2026-05-28 AAR3355 GMP → PEK May 28, 06:30 UTCMay 28, 06:55 UTC25m
2026-05-28 AAR1135 KIX → GMP May 28, 02:35 UTCMay 28, 03:55 UTC1h 20m
2026-05-27 AAR1145 GMP → KIX May 27, 23:30 UTCMay 28, 00:50 UTC1h 20m
2026-05-27 AAR8980 CJU → GMP May 27, 10:15 UTCMay 27, 10:45 UTC30m
2026-05-27 AAR8973 GMP → CJU May 27, 07:10 UTCMay 27, 07:35 UTC25m
2026-05-27 AAR8936 CJU → GMP May 27, 05:14 UTCMay 27, 05:55 UTC40m
2026-05-26 AAR8900 CJU → GMP May 26, 21:59 UTCMay 26, 22:35 UTC35m
2026-05-26 AAR8993 GMP → CJU May 26, 12:14 UTCMay 26, 12:40 UTC25m
2026-05-26 AAR8980 CJU → GMP May 26, 10:20 UTCMay 26, 10:54 UTC35m
2026-05-26 AAR8973 GMP → CJU May 26, 07:10 UTCMay 26, 07:34 UTC25m
2026-05-26 AAR8942 CJU → GMP May 26, 05:34 UTCMay 26, 06:04 UTC30m
2026-05-26 AAR8941 GMP → CJU May 26, 02:29 UTCMay 26, 02:55 UTC25m
2026-05-26 AAR8914 CJU → GMP May 26, 00:29 UTCMay 26, 01:00 UTC30m
2026-05-25 AAR8913 GMP → CJU May 25, 21:54 UTCMay 25, 22:19 UTC25m
2026-05-25 AAR8980 CJU → GMP May 25, 10:20 UTCMay 25, 10:50 UTC30m
2026-05-25 AAR8973 GMP → CJU May 25, 07:05 UTCMay 25, 07:30 UTC25m
2026-05-25 AAR8942 CJU → GMP May 25, 05:20 UTCMay 25, 05:55 UTC35m
2026-05-25 AAR8941 GMP → CJU May 25, 02:35 UTCMay 25, 03:00 UTC25m
2026-05-24 AAR8980 CJU → GMP May 24, 10:15 UTCMay 24, 10:45 UTC30m
2026-05-24 AAR8973 GMP → CJU May 24, 07:25 UTCMay 24, 07:50 UTC25m
2026-05-24 AAR8942 CJU → GMP May 24, 05:45 UTCMay 24, 06:10 UTC25m
2026-05-24 AAR8941 GMP → CJU May 24, 03:00 UTCMay 24, 03:25 UTC25m
2026-05-24 AAR8914 CJU → GMP May 24, 00:15 UTCMay 24, 00:50 UTC35m
2026-05-23 AAR8913 GMP → CJU May 23, 21:55 UTCMay 23, 22:20 UTC25m
2026-05-23 AAR3365 PEK → GMP May 23, 10:20 UTCMay 23, 10:50 UTC30m
2026-05-23 AAR3355 GMP → PEK May 23, 06:25 UTCMay 23, 06:45 UTC20m
2026-05-23 AAR1135 KIX → GMP May 23, 02:45 UTCMay 23, 04:15 UTC1h 30m
2026-05-22 AAR1145 GMP → KIX May 22, 23:25 UTCMay 23, 00:45 UTC1h 20m
2026-05-22 AAR3365 PEK → GMP May 22, 10:30 UTCMay 22, 10:55 UTC25m
2026-05-22 AAR3355 GMP → PEK May 22, 06:25 UTCMay 22, 06:50 UTC25m
2026-05-22 AAR1135 KIX → GMP May 22, 02:30 UTCMay 22, 03:50 UTC1h 20m
2026-05-21 AAR1145 GMP → KIX May 21, 23:25 UTCMay 22, 00:40 UTC1h 15m
2026-05-21 AAR8980 CJU → GMP May 21, 10:15 UTCMay 21, 10:45 UTC30m
2026-05-21 AAR8973 GMP → CJU May 21, 07:10 UTCMay 21, 07:35 UTC25m
2026-05-21 AAR8936 CJU → GMP May 21, 05:20 UTCMay 21, 06:00 UTC40m
2026-05-21 AAR8941 GMP → CJU May 21, 02:50 UTCMay 21, 03:15 UTC25m
2026-05-21 AAR8914 CJU → GMP May 21, 00:20 UTCMay 21, 00:55 UTC35m

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 HL8004 page for operator, model, and routing details .

Mode-S 71C004 frequently asked

What is Mode-S code 71C004?
71C004 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8004.
Where is Mode-S 71C004 registered?
Mode-S code 71C004 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 71C004 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C004, octal 34340004, decimal 7,454,724.
What flights does 71C004 operate?
Mode-S 71C004 has broadcast 20 distinct callsigns, including AAR8936, AAR8708, AAR8985, AAR8900, AAR8707.