Apparatus

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sensors Mode-S transponder

71C278

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

Currently assigned to HL8278 · AIRBUS A-321

Hex
71C278
Octal
34341170
Decimal
7,455,352
Country
KR
Tail
HL8278
Type
A321
No current signal · last broadcast 36m ago
Flights observed
319
Distinct callsigns
20
Country
KR
Last broadcast
36m ago

Last known position

Most recent position reported by Mode-S 71C278.

Country allocation

The ICAO 24-bit address 71C278 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
AAR8994 Asiana Airlines 10 2026-05-15
AAR8935 Asiana Airlines 10 2026-05-15
AAR8733 Asiana Airlines 10 2026-05-14
AAR8993 Asiana Airlines 9 2026-05-28
AAR8734 Asiana Airlines 9 2026-05-15
AAR8147 Asiana Airlines 9 2026-05-14
AAR8145 Asiana Airlines 9 2026-05-14
AAR8948 Asiana Airlines 8 2026-05-28
AAR8736 Asiana Airlines 8 2026-05-28
AAR8735 Asiana Airlines 8 2026-05-28
AAR8232 Asiana Airlines 8 2026-05-30
AAR8146 Asiana Airlines 8 2026-05-14
AAR8144 Asiana Airlines 8 2026-05-14
AAR8996 Asiana Airlines 7 2026-05-27
AAR8986 Asiana Airlines 7 2026-05-29
AAR8981 Asiana Airlines 7 2026-05-29
AAR8973 Asiana Airlines 7 2026-05-04
AAR8956 Asiana Airlines 7 2026-05-29
AAR8942 Asiana Airlines 7 2026-05-04
AAR8941 Asiana Airlines 7 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AAR8232 CJU → CJJ May 30, 03:10 UTCMay 30, 03:35 UTC25m
2026-05-29 AAR8995 GMP → CJU May 29, 12:35 UTCMay 29, 12:55 UTC20m
2026-05-29 AAR8986 CJU → GMP May 29, 10:50 UTCMay 29, 11:25 UTC35m
2026-05-29 AAR8981 GMP → CJU May 29, 08:35 UTCMay 29, 09:00 UTC25m
2026-05-29 AAR8956 CJU → GMP May 29, 07:05 UTCMay 29, 07:35 UTC30m
2026-05-29 AAR8233 CJJ → CJU May 29, 04:40 UTCMay 29, 05:00 UTC20m
2026-05-29 AAR8232 CJU → CJJ May 29, 03:10 UTCMay 29, 03:35 UTC25m
2026-05-28 AAR8993 GMP → CJU May 28, 11:55 UTCMay 28, 12:15 UTC20m
2026-05-28 AAR8736 RSU → GMP May 28, 09:45 UTCMay 28, 10:15 UTC30m
2026-05-28 AAR8735 GMP → RSU May 28, 08:05 UTCMay 28, 08:30 UTC25m
2026-05-28 AAR8948 CJU → GMP May 28, 06:40 UTCMay 28, 07:10 UTC30m
2026-05-27 AAR8901 GMP → CJU May 27, 21:55 UTCMay 27, 22:20 UTC25m
2026-05-27 AAR8996 CJU → GMP May 27, 12:25 UTCMay 27, 12:55 UTC30m
2026-05-27 AAR8127 - May 27, 10:25 UTCMay 27, 10:35 UTC10m
2026-05-27 AAR8126 CJU → TAE May 27, 09:25 UTCMay 27, 09:35 UTC10m
2026-05-27 AAR8949 GMP → CJU May 27, 03:54 UTCMay 27, 04:19 UTC25m
2026-05-27 AAR8920 CJU → GMP May 27, 02:09 UTCMay 27, 02:44 UTC35m
2026-05-26 AAR8927 GMP → CJU May 26, 23:49 UTCMay 27, 00:14 UTC25m
2026-05-26 AAR8902 CJU → GMP May 26, 21:59 UTCMay 26, 22:35 UTC35m
2026-05-26 AAR8985 GMP → CJU May 26, 10:44 UTCMay 26, 11:15 UTC30m
2026-05-26 AAR8708 KWJ → GMP May 26, 08:30 UTCMay 26, 09:09 UTC40m
2026-05-26 AAR8707 GMP → KWJ May 26, 06:49 UTCMay 26, 07:10 UTC20m
2026-05-26 AAR8936 CJU → GMP May 26, 05:20 UTCMay 26, 05:54 UTC35m
2026-05-25 AAR8921 GMP → CJU May 25, 23:35 UTCMay 26, 00:00 UTC25m
2026-05-25 AAR8900 CJU → GMP May 25, 22:00 UTCMay 25, 22:25 UTC25m
2026-05-25 AAR8995 GMP → CJU May 25, 12:25 UTCMay 25, 12:50 UTC25m
2026-05-25 AAR8986 CJU → GMP May 25, 10:55 UTCMay 25, 11:20 UTC25m
2026-05-25 AAR8981 GMP → CJU May 25, 08:40 UTCMay 25, 09:05 UTC25m
2026-05-25 AAR8956 CJU → GMP May 25, 07:15 UTCMay 25, 07:45 UTC30m
2026-05-25 AAR8233 CJJ → CJU May 25, 04:25 UTCMay 25, 04:40 UTC15m
2026-05-25 AAR8232 CJU → CJJ May 25, 03:00 UTCMay 25, 03:25 UTC25m
2026-05-24 AAR8995 GMP → CJU May 24, 12:25 UTCMay 24, 12:45 UTC20m
2026-05-24 AAR8986 CJU → GMP May 24, 10:55 UTCMay 24, 11:25 UTC30m
2026-05-24 AAR8981 GMP → CJU May 24, 08:40 UTCMay 24, 09:05 UTC25m
2026-05-24 AAR8956 CJU → GMP May 24, 07:20 UTCMay 24, 07:50 UTC30m
2026-05-24 AAR8233 CJJ → CJU May 24, 04:15 UTCMay 24, 04:30 UTC15m
2026-05-24 AAR8232 CJU → CJJ May 24, 02:50 UTCMay 24, 03:15 UTC25m
2026-05-23 AAR8122 CJU → TAE May 23, 23:35 UTCMay 23, 23:45 UTC10m
2026-05-23 AAR8995 GMP → CJU May 23, 12:25 UTCMay 23, 12:50 UTC25m
2026-05-23 AAR8986 CJU → GMP May 23, 10:50 UTCMay 23, 11:25 UTC35m
2026-05-23 AAR8981 GMP → CJU May 23, 08:45 UTCMay 23, 09:10 UTC25m
2026-05-23 AAR8956 CJU → GMP May 23, 07:15 UTCMay 23, 07:45 UTC30m
2026-05-23 AAR8233 CJJ → CJU May 23, 04:20 UTCMay 23, 04:35 UTC15m
2026-05-23 AAR8232 CJU → CJJ May 23, 02:50 UTCMay 23, 03:15 UTC25m
2026-05-22 AAR8122 CJU → TAE May 22, 23:45 UTCMay 23, 00:00 UTC15m
2026-05-22 AAR8993 GMP → CJU May 22, 12:05 UTCMay 22, 12:30 UTC25m
2026-05-22 AAR8736 RSU → GMP May 22, 10:25 UTCMay 22, 11:05 UTC40m
2026-05-22 AAR8735 GMP → RSU May 22, 08:45 UTCMay 22, 09:10 UTC25m
2026-05-22 AAR8948 CJU → GMP May 22, 07:05 UTCMay 22, 07:35 UTC30m
2026-05-21 AAR8901 GMP → CJU May 21, 21:45 UTCMay 21, 22:05 UTC20m

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 HL8278 page for operator, model, and routing details .

Mode-S 71C278 frequently asked

What is Mode-S code 71C278?
71C278 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8278.
Where is Mode-S 71C278 registered?
Mode-S code 71C278 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 71C278 broadcasting right now?
No active broadcast right now. Last signal was 36m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C278, octal 34341170, decimal 7,455,352.
What flights does 71C278 operate?
Mode-S 71C278 has broadcast 20 distinct callsigns, including AAR8994, AAR8935, AAR8733, AAR8993, AAR8734.