Apparatus

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sensors Mode-S transponder

71C018

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

Currently assigned to HL8018 · AIRBUS A-321

Hex
71C018
Octal
34340030
Decimal
7,454,744
Country
KR
Tail
HL8018
Type
A321
No current signal · last broadcast Jul 26, 12:35 UTC
Flights observed
714
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 12:35 UTC

Last known position

Most recent position reported by Mode-S 71C018.

Country allocation

The ICAO 24-bit address 71C018 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
AAR8904 Asiana Airlines 40 2026-07-23
AAR8704 Asiana Airlines 39 2026-07-24
AAR8703 Asiana Airlines 39 2026-07-24
AAR8953 Asiana Airlines 38 2026-07-24
AAR8239 Asiana Airlines 36 2026-07-24
AAR8238 Asiana Airlines 36 2026-07-24
AAR8235 Asiana Airlines 36 2026-07-24
AAR8234 Asiana Airlines 35 2026-07-24
AAR8948 Asiana Airlines 19 2026-07-26
AAR8949 Asiana Airlines 18 2026-07-25
AAR8736 Asiana Airlines 18 2026-07-26
AAR8735 Asiana Airlines 18 2026-07-26
AAR8996 Asiana Airlines 17 2026-07-25
AAR8902 Asiana Airlines 17 2026-07-24
AAR8993 Asiana Airlines 16 2026-07-26
AAR8927 Asiana Airlines 16 2026-07-24
AAR8920 Asiana Airlines 16 2026-07-25
AAR8143 Asiana Airlines 15 2026-07-26
AAR8140 Asiana Airlines 15 2026-07-25
AAR8141 Asiana Airlines 14 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAR8993 GMP → CJU Jul 26, 12:00 UTCJul 26, 12:35 UTC35m
2026-07-26 AAR8736 RSU → GMP Jul 26, 10:20 UTCJul 26, 10:55 UTC35m
2026-07-26 AAR8735 GMP → RSU Jul 26, 08:50 UTCJul 26, 09:20 UTC30m
2026-07-26 AAR8948 CJU → GMP Jul 26, 07:05 UTCJul 26, 07:45 UTC40m
2026-07-26 AAR8143 KWJ → CJU Jul 26, 04:45 UTCJul 26, 04:55 UTC10m
2026-07-26 AAR8142 CJU → KWJ Jul 26, 03:10 UTCJul 26, 03:20 UTC10m
2026-07-26 AAR8141 KWJ → CJU Jul 26, 01:10 UTCJul 26, 01:20 UTC10m
2026-07-25 AAR8140 CJU → KWJ Jul 25, 23:55 UTCJul 26, 00:10 UTC15m
2026-07-25 AAR8913 GMP → CJU Jul 25, 21:55 UTCJul 25, 22:30 UTC35m
2026-07-25 AAR8996 CJU → GMP Jul 25, 12:30 UTCJul 25, 13:10 UTC40m
2026-07-25 AAR8127 - Jul 25, 10:35 UTCJul 25, 10:45 UTC10m
2026-07-25 AAR8126 CJU → TAE Jul 25, 09:10 UTCJul 25, 09:25 UTC15m
2026-07-25 AAR8949 GMP → CJU Jul 25, 03:45 UTCJul 25, 04:20 UTC35m
2026-07-25 AAR8920 CJU → GMP Jul 25, 01:45 UTCJul 25, 02:25 UTC40m
2026-07-24 AAR8927 GMP → CJU Jul 24, 23:45 UTCJul 25, 00:15 UTC30m
2026-07-24 AAR8902 CJU → GMP Jul 24, 21:55 UTCJul 24, 22:40 UTC45m
2026-07-24 AAR8239 CJJ → CJU Jul 24, 12:25 UTCJul 24, 12:55 UTC30m
2026-07-24 AAR8238 CJU → CJJ Jul 24, 10:30 UTCJul 24, 11:00 UTC30m
2026-07-24 AAR8235 CJJ → CJU Jul 24, 08:25 UTCJul 24, 08:55 UTC30m
2026-07-24 AAR8234 CJU → CJJ Jul 24, 06:55 UTCJul 24, 07:25 UTC30m
2026-07-24 AAR8953 GMP → CJU Jul 24, 04:40 UTCJul 24, 05:15 UTC35m
2026-07-24 AAR8704 KWJ → GMP Jul 24, 02:10 UTCJul 24, 02:50 UTC40m
2026-07-24 AAR8703 GMP → KWJ Jul 24, 00:45 UTCJul 24, 01:05 UTC20m
2026-07-23 AAR8904 CJU → GMP Jul 23, 22:30 UTCJul 23, 23:10 UTC40m
2026-07-23 AAR8239 CJJ → CJU Jul 23, 12:25 UTCJul 23, 12:55 UTC30m
2026-07-23 AAR8238 CJU → CJJ Jul 23, 10:30 UTCJul 23, 11:00 UTC30m
2026-07-23 AAR8235 CJJ → CJU Jul 23, 08:25 UTCJul 23, 08:50 UTC25m
2026-07-23 AAR8234 CJU → CJJ Jul 23, 06:45 UTCJul 23, 07:15 UTC30m
2026-07-23 AAR8953 GMP → CJU Jul 23, 04:40 UTCJul 23, 05:15 UTC35m
2026-07-23 AAR8704 KWJ → GMP Jul 23, 02:10 UTCJul 23, 02:50 UTC40m
2026-07-23 AAR8703 GMP → KWJ Jul 23, 00:45 UTCJul 23, 01:15 UTC30m
2026-07-22 AAR8904 CJU → GMP Jul 22, 22:30 UTCJul 22, 23:10 UTC40m
2026-07-22 AAR8239 CJJ → CJU Jul 22, 12:30 UTCJul 22, 12:55 UTC25m
2026-07-22 AAR8238 CJU → CJJ Jul 22, 11:15 UTCJul 22, 11:25 UTC10m
2026-07-22 AAR8953 GMP → CJU Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-22 AAR8704 KWJ → GMP Jul 22, 02:10 UTCJul 22, 02:50 UTC40m
2026-07-22 AAR8703 GMP → KWJ Jul 22, 00:40 UTCJul 22, 01:10 UTC30m
2026-07-21 AAR8904 - Jul 21, 22:30 UTCJul 21, 23:10 UTC40m
2026-07-21 AAR8239 CJJ → CJU Jul 21, 12:30 UTCJul 21, 13:00 UTC30m
2026-07-21 AAR8238 CJU → CJJ Jul 21, 10:50 UTCJul 21, 11:20 UTC30m
2026-07-21 AAR8235 - Jul 21, 08:50 UTCJul 21, 09:20 UTC30m
2026-07-21 AAR8234 CJU → CJJ Jul 21, 07:15 UTCJul 21, 07:45 UTC30m
2026-07-21 AAR8953 GMP → CJU Jul 21, 04:45 UTCJul 21, 05:20 UTC35m
2026-07-21 AAR8704 KWJ → GMP Jul 21, 02:30 UTCJul 21, 03:10 UTC40m
2026-07-21 AAR8703 GMP → KWJ Jul 21, 00:50 UTCJul 21, 01:30 UTC40m
2026-07-20 AAR8904 - Jul 20, 22:35 UTCJul 20, 23:15 UTC40m
2026-07-20 AAR8993 - Jul 20, 12:05 UTCJul 20, 12:40 UTC35m
2026-07-20 AAR8736 - Jul 20, 09:35 UTCJul 20, 10:15 UTC40m
2026-07-20 AAR8735 - Jul 20, 08:00 UTCJul 20, 08:35 UTC35m
2026-07-20 AAR8948 CJU → GMP Jul 20, 06:05 UTCJul 20, 06:45 UTC40m

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 HL8018 page for operator, model, and routing details .

Mode-S 71C018 frequently asked

What is Mode-S code 71C018?
71C018 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8018.
Where is Mode-S 71C018 registered?
Mode-S code 71C018 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 71C018 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C018, octal 34340030, decimal 7,454,744.
What flights does 71C018 operate?
Mode-S 71C018 has broadcast 20 distinct callsigns, including AAR8904, AAR8704, AAR8703, AAR8953, AAR8239.