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
Transponder active on ground
Flights observed
321
Distinct callsigns
20
Country
KR
Last broadcast
5h ago

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
KAL2001 Korean Air 43 2026-07-05
KAL428 - 42 2026-07-10
KAL2002 - 27 2026-07-06
KAL427 - 25 2026-07-10
KAL2011 - 17 2026-07-05
KAL868 - 14 2026-07-05
KAL460 - 10 2026-06-28
KAL459 - 10 2026-07-03
KAL2012 - 10 2026-07-05
KAL867 - 9 2026-07-04
KAL648 - 9 2026-06-27
KAL141 - 9 2026-07-11
KAL831 Korean Air 8 2026-05-24
KAL142 - 7 2026-07-11
KAL832 Korean Air 6 2026-05-25
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
2026-07-14 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
2026-07-08 KAL165 - Jul 8, 23:55 UTCJul 9, 00:20 UTC25m
2026-07-08 KAL428 - Jul 8, 15:50 UTCJul 8, 21:55 UTC6h 5m
2026-07-08 KAL427 - Jul 8, 07:40 UTCJul 8, 13:30 UTC5h 50m
2026-07-07 KAL428 KUL → ICN Jul 7, 15:40 UTCJul 7, 21:45 UTC6h 5m
2026-07-07 KAL427 - Jul 7, 07:40 UTCJul 7, 13:40 UTC6h 0m
2026-07-07 KAL706 - Jul 7, 00:35 UTCJul 7, 02:30 UTC1h 55m
2026-07-06 KAL705 ICN → NRT Jul 6, 10:05 UTCJul 6, 11:55 UTC1h 50m
2026-07-06 KAL2002 HKG → ICN Jul 6, 04:40 UTCJul 6, 07:50 UTC3h 10m
2026-07-05 KAL2001 ICN → HKG Jul 5, 23:35 UTCJul 6, 02:40 UTC3h 5m
2026-07-05 KAL2012 HKG → ICN Jul 5, 17:10 UTCJul 5, 20:15 UTC3h 5m
2026-07-05 KAL2011 - Jul 5, 13:55 UTCJul 5, 14:25 UTC30m
2026-07-05 KAL2011 - Jul 5, 11:05 UTCJul 5, 13:20 UTC2h 15m
2026-07-05 KAL868 ICN → ICN Jul 5, 00:35 UTCJul 5, 08:15 UTC7h 40m
2026-07-04 KAL868 - Jul 4, 08:55 UTCJul 4, 09:30 UTC35m
2026-07-04 KAL867 - Jul 4, 00:10 UTCJul 4, 00:50 UTC40m
2026-07-03 KAL459 ICN → ICN Jul 3, 09:45 UTCJul 3, 20:00 UTC10h 15m
2026-07-03 KAL142 - Jul 3, 07:15 UTCJul 3, 07:40 UTC25m
2026-07-03 KAL141 - Jul 3, 00:40 UTCJul 3, 06:20 UTC5h 40m
2026-07-02 KAL428 KUL → ICN Jul 2, 16:15 UTCJul 2, 22:40 UTC6h 25m
2026-07-02 KAL427 - Jul 2, 07:55 UTCJul 2, 14:05 UTC6h 10m
2026-07-02 KAL788 - Jul 2, 02:30 UTCJul 2, 03:30 UTC1h 0m
2026-07-01 KAL787 ICN → FUK Jul 1, 23:20 UTCJul 2, 00:00 UTC40m
2026-07-01 KAL2012 - Jul 1, 16:50 UTCJul 1, 19:55 UTC3h 5m
2026-07-01 KAL2011 - Jul 1, 14:05 UTCJul 1, 14:25 UTC20m
2026-07-01 KAL2011 - Jul 1, 11:05 UTCJul 1, 13:25 UTC2h 20m
2026-07-01 KAL2002 - Jul 1, 05:30 UTCJul 1, 07:45 UTC2h 15m
2026-07-01 KAL2002 - Jul 1, 04:40 UTCJul 1, 04:55 UTC15m
2026-07-01 KAL2001 ICN → HKG Jul 1, 02:25 UTCJul 1, 02:40 UTC15m
2026-06-30 KAL2001 ICN → HKG Jun 30, 23:35 UTCJul 1, 01:50 UTC2h 15m
2026-06-30 KAL2012 - Jun 30, 17:00 UTCJun 30, 20:05 UTC3h 5m
2026-06-30 KAL2011 - Jun 30, 13:50 UTCJun 30, 14:10 UTC20m
2026-06-30 KAL2011 - Jun 30, 11:05 UTCJun 30, 13:15 UTC2h 10m
2026-06-30 KAL2002 HKG → ICN Jun 30, 04:40 UTCJun 30, 07:50 UTC3h 10m

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?
Mode-S 71C001 is currently broadcasting from the ground.
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 KAL2001, KAL428, KAL2002, KAL427, KAL2011.