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
Broadcasting now · callsign AAR8735 · 4,225 ft
Flights observed
463
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:40 UTC

Current position

71C004 is currently broadcasting. Map zoomed to live position.

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
AAR8708 Asiana Airlines 21 2026-07-26
AAR8936 Asiana Airlines 20 2026-07-26
AAR8985 Asiana Airlines 19 2026-07-26
AAR8900 Asiana Airlines 19 2026-07-26
AAR8707 Asiana Airlines 18 2026-07-26
AAR8921 - 17 2026-07-21
AAR8996 Asiana Airlines 11 2026-07-24
AAR8949 Asiana Airlines 11 2026-07-24
AAR8993 Asiana Airlines 10 2026-06-08
AAR8927 Asiana Airlines 10 2026-07-23
AAR8920 Asiana Airlines 10 2026-07-24
AAR8902 Asiana Airlines 10 2026-07-23
AAR8734 Asiana Airlines 10 2026-07-25
AAR8948 Asiana Airlines 9 2026-06-08
AAR8901 Asiana Airlines 9 2026-06-07
AAR8736 Asiana Airlines 9 2026-06-08
AAR8735 Asiana Airlines 9 2026-06-08
AAR8994 Asiana Airlines 8 2026-07-25
AAR8953 Asiana Airlines 8 2026-05-20
AAR8935 Asiana Airlines 8 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAR8900 CJU → GMP Jul 26, 21:50 UTCJul 26, 22:35 UTC45m
2026-07-26 AAR8985 GMP → CJU Jul 26, 10:25 UTCJul 26, 10:55 UTC30m
2026-07-26 AAR8708 KWJ → GMP Jul 26, 08:35 UTCJul 26, 09:15 UTC40m
2026-07-26 AAR8707 GMP → KWJ Jul 26, 07:00 UTCJul 26, 07:25 UTC25m
2026-07-26 AAR8936 CJU → GMP Jul 26, 05:10 UTCJul 26, 05:55 UTC45m
2026-07-26 AAR8935 GMP → CJU Jul 26, 01:55 UTCJul 26, 02:30 UTC35m
2026-07-25 AAR8734 RSU → GMP Jul 25, 23:55 UTCJul 26, 00:30 UTC35m
2026-07-25 AAR8733 GMP → RSU Jul 25, 22:20 UTCJul 25, 22:50 UTC30m
2026-07-25 AAR8994 CJU → GMP Jul 25, 12:40 UTCJul 25, 13:25 UTC45m
2026-07-25 AAR8147 KWJ → CJU Jul 25, 09:30 UTCJul 25, 09:40 UTC10m
2026-07-25 AAR8146 CJU → KWJ Jul 25, 08:15 UTCJul 25, 08:30 UTC15m
2026-07-25 AAR8145 KWJ → CJU Jul 25, 06:00 UTCJul 25, 06:10 UTC10m
2026-07-25 AAR8144 CJU → KWJ Jul 25, 04:40 UTCJul 25, 04:50 UTC10m
2026-07-25 AAR8935 GMP → CJU Jul 25, 02:05 UTCJul 25, 02:35 UTC30m
2026-07-25 AAR8734 RSU → GMP Jul 25, 00:00 UTCJul 25, 00:40 UTC40m
2026-07-24 AAR8733 GMP → RSU Jul 24, 22:25 UTCJul 24, 22:55 UTC30m
2026-07-24 AAR8996 CJU → GMP Jul 24, 12:25 UTCJul 24, 13:10 UTC45m
2026-07-24 AAR8127 - Jul 24, 10:35 UTCJul 24, 10:55 UTC20m
2026-07-24 AAR8126 CJU → TAE Jul 24, 09:10 UTCJul 24, 09:30 UTC20m
2026-07-24 AAR8949 GMP → CJU Jul 24, 03:45 UTCJul 24, 04:20 UTC35m
2026-07-24 AAR8920 CJU → GMP Jul 24, 01:45 UTCJul 24, 02:25 UTC40m
2026-07-23 AAR8927 GMP → CJU Jul 23, 23:40 UTCJul 24, 00:20 UTC40m
2026-07-23 AAR8902 CJU → GMP Jul 23, 21:55 UTCJul 23, 22:35 UTC40m
2026-07-23 AAR8985 GMP → CJU Jul 23, 10:30 UTCJul 23, 11:10 UTC40m
2026-07-23 AAR8708 KWJ → GMP Jul 23, 08:25 UTCJul 23, 09:15 UTC50m
2026-07-23 AAR8707 GMP → KWJ Jul 23, 07:00 UTCJul 23, 07:25 UTC25m
2026-07-23 AAR8936 CJU → GMP Jul 23, 05:10 UTCJul 23, 05:55 UTC45m
2026-07-23 AAR8935 GMP → CJU Jul 23, 02:00 UTCJul 23, 02:30 UTC30m
2026-07-23 AAR8734 RSU → GMP Jul 23, 00:00 UTCJul 23, 00:40 UTC40m
2026-07-22 AAR8733 - Jul 22, 22:20 UTCJul 22, 22:50 UTC30m
2026-07-22 AAR8994 CJU → GMP Jul 22, 12:25 UTCJul 22, 13:05 UTC40m
2026-07-22 AAR8144 CJU → KWJ Jul 22, 04:40 UTCJul 22, 04:55 UTC15m
2026-07-21 AAR8921 - Jul 21, 23:35 UTCJul 22, 00:10 UTC35m
2026-07-21 AAR8900 CJU → GMP Jul 21, 21:50 UTCJul 21, 22:30 UTC40m
2026-07-21 AAR8147 KWJ → CJU Jul 21, 09:10 UTCJul 21, 09:25 UTC15m
2026-07-21 AAR8146 CJU → KWJ Jul 21, 08:05 UTCJul 21, 08:20 UTC15m
2026-07-21 AAR8145 KWJ → CJU Jul 21, 06:00 UTCJul 21, 06:10 UTC10m
2026-07-21 AAR8144 CJU → KWJ Jul 21, 04:40 UTCJul 21, 05:00 UTC20m
2026-07-21 AAR8935 GMP → CJU Jul 21, 02:00 UTCJul 21, 02:40 UTC40m
2026-07-20 AAR8734 RSU → GMP Jul 20, 23:55 UTCJul 21, 00:35 UTC40m
2026-07-20 AAR8733 - Jul 20, 22:20 UTCJul 20, 22:50 UTC30m
2026-07-20 AAR8994 CJU → GMP Jul 20, 12:30 UTCJul 20, 13:10 UTC40m
2026-07-20 AAR8985 GMP → CJU Jul 20, 10:20 UTCJul 20, 10:55 UTC35m
2026-07-20 AAR8708 KWJ → GMP Jul 20, 08:25 UTCJul 20, 09:05 UTC40m
2026-07-20 AAR8707 GMP → KWJ Jul 20, 06:50 UTCJul 20, 07:35 UTC45m
2026-07-20 AAR8936 CJU → GMP Jul 20, 05:20 UTCJul 20, 06:05 UTC45m
2026-07-19 AAR8921 - Jul 19, 23:45 UTCJul 20, 00:20 UTC35m
2026-07-19 AAR8900 - Jul 19, 21:50 UTCJul 19, 22:30 UTC40m
2026-07-19 AAR8995 - Jul 19, 12:35 UTCJul 19, 13:10 UTC35m
2026-07-19 AAR8986 - Jul 19, 11:00 UTCJul 19, 11:35 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?
Yes. Mode-S 71C004 is currently airborne.
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 AAR8708, AAR8936, AAR8985, AAR8900, AAR8707.