Apparatus

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sensors Mode-S transponder

71C001

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

Currently assigned to HL8001 · AIRBUS A-330-300

Hex
71C001
Octal
34340001
Decimal
7,454,721
Country
KR
Tail
HL8001
Type
A333
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
354
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 71C001.

Country allocation

The ICAO 24-bit address 71C001 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
KAL428 Korean Air 48 2026-07-26
KAL2001 Korean Air 45 2026-07-22
KAL427 Korean Air 29 2026-07-26
KAL2002 Korean Air 29 2026-07-23
KAL2011 - 17 2026-07-05
KAL868 - 14 2026-07-05
KAL460 Korean Air 12 2026-07-22
KAL459 Korean Air 11 2026-07-23
KAL867 Korean Air 10 2026-07-17
KAL831 - 10 2026-07-17
KAL2012 - 10 2026-07-05
KAL141 - 10 2026-07-19
KAL648 - 9 2026-06-27
KAL832 - 8 2026-07-18
KAL142 - 8 2026-07-19
KAL752 Korean Air 6 2026-05-03
KAL751 Korean Air 6 2026-05-03
KAL660 - 6 2026-07-13
KAL647 - 6 2026-06-26
KAL659 - 5 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL428 KUL → ICN Jul 26, 15:45 UTCJul 26, 21:55 UTC6h 10m
2026-07-26 KAL427 ICN → KUL Jul 26, 07:50 UTCJul 26, 13:40 UTC5h 50m
2026-07-26 KAL706 NRT → ICN Jul 26, 00:40 UTCJul 26, 02:35 UTC1h 55m
2026-07-25 KAL705 ICN → NRT Jul 25, 10:30 UTCJul 25, 12:30 UTC2h 0m
2026-07-25 KAL622 MNL → ICN Jul 25, 05:10 UTCJul 25, 08:40 UTC3h 30m
2026-07-24 KAL621 ICN → MNL Jul 24, 23:45 UTCJul 25, 03:05 UTC3h 20m
2026-07-23 KAL459 ICN → DAD Jul 23, 10:05 UTCJul 23, 20:05 UTC10h 0m
2026-07-23 KAL2002 HKG → ICN Jul 23, 04:40 UTCJul 23, 07:55 UTC3h 15m
2026-07-22 KAL2001 ICN → HKG Jul 22, 23:35 UTCJul 23, 02:35 UTC3h 0m
2026-07-22 KAL460 DAD → ICN Jul 22, 00:55 UTCJul 22, 20:00 UTC19h 5m
2026-07-21 KAL166 - Jul 21, 06:15 UTCJul 21, 06:40 UTC25m
2026-07-21 KAL165 - Jul 21, 00:05 UTCJul 21, 00:35 UTC30m
2026-07-20 KAL428 - Jul 20, 18:55 UTCJul 20, 21:40 UTC2h 45m
2026-07-20 KAL428 - Jul 20, 15:45 UTCJul 20, 16:00 UTC15m
2026-07-20 KAL427 ICN → KUL Jul 20, 07:35 UTCJul 20, 13:30 UTC5h 55m
2026-07-20 KAL706 NRT → ICN Jul 20, 00:40 UTCJul 20, 02:35 UTC1h 55m
2026-07-19 KAL705 ICN → NRT Jul 19, 09:45 UTCJul 19, 11:35 UTC1h 50m
2026-07-19 KAL142 - Jul 19, 07:00 UTCJul 19, 07:20 UTC20m
2026-07-19 KAL141 - Jul 19, 00:30 UTCJul 19, 06:05 UTC5h 35m
2026-07-18 KAL428 - Jul 18, 15:50 UTCJul 18, 21:45 UTC5h 55m
2026-07-18 KAL427 - Jul 18, 07:45 UTCJul 18, 13:25 UTC5h 40m
2026-07-18 KAL832 - Jul 18, 03:30 UTCJul 18, 04:00 UTC30m
2026-07-17 KAL831 - Jul 17, 23:30 UTCJul 17, 23:50 UTC20m
2026-07-17 KAL867 ICN → CAN Jul 17, 00:14 UTCJul 17, 08:15 UTC8h 0m
2026-07-16 KAL428 - Jul 16, 18:59 UTCJul 16, 21:50 UTC2h 50m
2026-07-16 KAL428 - Jul 16, 15:49 UTCJul 16, 16:05 UTC15m
2026-07-16 KAL427 - Jul 16, 08:05 UTCJul 16, 13:45 UTC5h 40m
2026-07-16 KAL832 - Jul 16, 03:35 UTCJul 16, 03:55 UTC20m
2026-07-15 KAL831 - Jul 15, 23:30 UTCJul 16, 00:00 UTC30m
2026-07-15 KAL460 ICN → ICN Jul 15, 10:00 UTCJul 15, 20:30 UTC10h 30m
2026-07-15 KAL2002 HKG → ICN Jul 15, 04:45 UTCJul 15, 08:00 UTC3h 15m
2026-07-14 KAL2001 ICN → HKG Jul 14, 23:35 UTCJul 15, 02:40 UTC3h 5m
2026-07-14 KAL2042 - Jul 14, 08:15 UTCJul 14, 08:35 UTC20m
2026-07-14 KAL2041 - Jul 14, 02:30 UTCJul 14, 02:50 UTC20m
2026-07-14 KAL2041 - Jul 14, 01:15 UTCJul 14, 01:35 UTC20m
2026-07-13 KAL660 - Jul 13, 05:55 UTCJul 13, 08:40 UTC2h 45m
2026-07-13 KAL660 - Jul 13, 03:20 UTCJul 13, 03:30 UTC10m
2026-07-12 KAL659 - Jul 12, 15:55 UTCJul 12, 16:10 UTC15m
2026-07-12 KAL659 - Jul 12, 11:10 UTCJul 12, 13:40 UTC2h 30m
2026-07-12 KAL660 - Jul 12, 05:40 UTCJul 12, 08:20 UTC2h 40m
2026-07-12 KAL660 - Jul 12, 03:15 UTCJul 12, 03:30 UTC15m
2026-07-11 KAL659 - Jul 11, 14:00 UTCJul 11, 20:10 UTC6h 10m
2026-07-11 KAL142 - Jul 11, 07:35 UTCJul 11, 08:01 UTC25m
2026-07-11 KAL141 - Jul 11, 00:45 UTCJul 11, 06:45 UTC6h 0m
2026-07-10 KAL428 - Jul 10, 21:45 UTCJul 10, 22:05 UTC20m
2026-07-10 KAL428 - Jul 10, 15:50 UTCJul 10, 18:35 UTC2h 45m
2026-07-10 KAL427 - Jul 10, 07:55 UTCJul 10, 13:45 UTC5h 50m
2026-07-10 KAL706 - Jul 10, 00:30 UTCJul 10, 02:30 UTC2h 0m
2026-07-09 KAL705 ICN → NRT Jul 9, 09:55 UTCJul 9, 11:45 UTC1h 50m
2026-07-09 KAL166 - Jul 9, 06:15 UTCJul 9, 06:40 UTC25m

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 HL8001 page for operator, model, and routing details .

Mode-S 71C001 frequently asked

What is Mode-S code 71C001?
71C001 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8001.
Where is Mode-S 71C001 registered?
Mode-S code 71C001 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 71C001 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C001, octal 34340001, decimal 7,454,721.
What flights does 71C001 operate?
Mode-S 71C001 has broadcast 20 distinct callsigns, including KAL428, KAL2001, KAL427, KAL2002, KAL2011.