Apparatus

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sensors Mode-S transponder

71C027

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

Currently assigned to HL8027 · AIRBUS A-330-300

Hex
71C027
Octal
34340047
Decimal
7,454,759
Country
KR
Tail
HL8027
Type
A333
No current signal · last broadcast Jul 26, 13:30 UTC
Flights observed
267
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 13:30 UTC

Last known position

Most recent position reported by Mode-S 71C027.

Country allocation

The ICAO 24-bit address 71C027 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 - 28 2026-07-15
KAL2001 - 23 2026-07-21
KAL427 - 22 2026-07-15
KAL2002 Korean Air 16 2026-07-22
KAL868 Korean Air 15 2026-07-25
KAL867 - 13 2026-07-16
KAL459 Korean Air 13 2026-07-24
KAL2011 Korean Air 13 2026-07-25
KAL2012 Korean Air 10 2026-07-25
KAL142 Korean Air 10 2026-07-24
KAL141 Korean Air 10 2026-07-24
KAL648 - 9 2026-06-25
KAL441 Korean Air 8 2026-05-15
KAL831 Korean Air 7 2026-06-11
KAL460 Korean Air 7 2026-07-24
KAL647 - 6 2026-06-24
KAL832 Korean Air 5 2026-06-12
KAL836 Korean Air 4 2026-07-26
KAL752 Korean Air 4 2026-04-27
KAL751 Korean Air 4 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL836 SZX → ICN Jul 26, 11:00 UTCJul 26, 13:30 UTC2h 30m
2026-07-26 KAL836 SZX → ICN Jul 26, 10:15 UTCJul 26, 10:25 UTC10m
2026-07-26 KAL835 ICN → SZX Jul 26, 04:30 UTCJul 26, 07:25 UTC2h 56m
2026-07-25 KAL2012 HKG → ICN Jul 25, 17:00 UTCJul 25, 20:00 UTC3h 0m
2026-07-25 KAL2011 ICN → HKG Jul 25, 11:15 UTCJul 25, 14:35 UTC3h 20m
2026-07-25 KAL868 CAN → ICN Jul 25, 00:30 UTCJul 25, 08:20 UTC7h 50m
2026-07-24 KAL460 DAD → ICN Jul 24, 20:15 UTCJul 24, 20:40 UTC25m
2026-07-24 KAL459 ICN → DAD Jul 24, 09:50 UTCJul 24, 19:30 UTC9h 40m
2026-07-24 KAL142 XIY → ICN Jul 24, 07:20 UTCJul 24, 07:45 UTC25m
2026-07-24 KAL141 ICN → XIY Jul 24, 00:45 UTCJul 24, 06:35 UTC5h 50m
2026-07-22 KAL2002 HKG → ICN Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-21 KAL2001 - Jul 21, 23:40 UTCJul 22, 02:40 UTC3h 0m
2026-07-21 KAL460 DAD → ICN Jul 21, 09:45 UTCJul 21, 20:10 UTC10h 25m
2026-07-21 KAL2042 - Jul 21, 07:30 UTCJul 21, 07:55 UTC25m
2026-07-20 KAL2041 ICN → UBN Jul 20, 23:55 UTCJul 21, 01:30 UTC1h 35m
2026-07-20 KAL2012 HKG → ICN Jul 20, 17:05 UTCJul 20, 20:10 UTC3h 5m
2026-07-20 KAL2011 ICN → HKG Jul 20, 11:15 UTCJul 20, 14:10 UTC2h 55m
2026-07-20 KAL142 - Jul 20, 08:40 UTCJul 20, 09:10 UTC30m
2026-07-20 KAL141 - Jul 20, 01:10 UTCJul 20, 01:40 UTC30m
2026-07-19 KAL888 ICN → ICN Jul 19, 02:40 UTCJul 19, 07:45 UTC5h 5m
2026-07-18 KAL142 - Jul 18, 06:55 UTCJul 18, 07:25 UTC30m
2026-07-18 KAL141 - Jul 18, 00:19 UTCJul 18, 06:05 UTC5h 46m
2026-07-17 KAL459 ICN → ICN Jul 17, 09:50 UTCJul 17, 20:25 UTC10h 35m
2026-07-17 KAL142 - Jul 17, 07:35 UTCJul 17, 08:04 UTC30m
2026-07-17 KAL141 - Jul 17, 00:50 UTCJul 17, 06:45 UTC5h 55m
2026-07-16 KAL868 - Jul 16, 07:45 UTCJul 16, 08:25 UTC40m
2026-07-16 KAL867 - Jul 16, 00:40 UTCJul 16, 01:25 UTC45m
2026-07-15 KAL428 - Jul 15, 15:50 UTCJul 15, 22:00 UTC6h 10m
2026-07-15 KAL427 - Jul 15, 07:50 UTCJul 15, 13:40 UTC5h 50m
2026-07-14 KAL892 - Jul 14, 11:10 UTCJul 15, 03:05 UTC15h 54m
2026-07-14 KAL868 - Jul 14, 00:15 UTCJul 14, 09:05 UTC8h 50m
2026-07-13 KAL459 - Jul 13, 09:50 UTCJul 13, 20:05 UTC10h 15m
2026-07-13 KAL142 - Jul 13, 07:20 UTCJul 13, 07:40 UTC20m
2026-07-13 KAL141 - Jul 13, 00:35 UTCJul 13, 06:30 UTC5h 55m
2026-07-12 KAL428 - Jul 12, 19:25 UTCJul 12, 21:55 UTC2h 30m
2026-07-12 KAL428 - Jul 12, 16:01 UTCJul 12, 16:15 UTC15m
2026-07-12 KAL427 - Jul 12, 08:05 UTCJul 12, 13:45 UTC5h 40m
2026-07-12 KAL788 - Jul 12, 01:50 UTCJul 12, 02:55 UTC1h 5m
2026-07-11 KAL787 - Jul 11, 23:20 UTCJul 12, 00:05 UTC45m
2026-07-11 KAL868 - Jul 11, 08:10 UTCJul 11, 08:30 UTC20m
2026-07-11 KAL867 - Jul 11, 00:15 UTCJul 11, 00:40 UTC25m
2026-07-10 KAL460 ICN → ICN Jul 10, 10:10 UTCJul 10, 20:30 UTC10h 20m
2026-07-10 KAL2002 HKG → ICN Jul 10, 04:40 UTCJul 10, 07:35 UTC2h 55m
2026-07-09 KAL2001 - Jul 9, 23:30 UTCJul 10, 02:35 UTC3h 5m
2026-07-09 KAL868 - Jul 9, 07:45 UTCJul 9, 08:25 UTC40m
2026-07-09 KAL867 - Jul 9, 00:20 UTCJul 9, 01:10 UTC50m
2026-07-08 KAL2012 HKG → ICN Jul 8, 17:00 UTCJul 8, 20:05 UTC3h 5m
2026-07-08 KAL2011 - Jul 8, 11:20 UTCJul 8, 14:25 UTC3h 5m
2026-07-08 KAL142 - Jul 8, 07:20 UTCJul 8, 07:40 UTC20m
2026-07-08 KAL141 - Jul 8, 00:45 UTCJul 8, 06:25 UTC5h 40m

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 HL8027 page for operator, model, and routing details .

Mode-S 71C027 frequently asked

What is Mode-S code 71C027?
71C027 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8027.
Where is Mode-S 71C027 registered?
Mode-S code 71C027 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 71C027 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C027, octal 34340047, decimal 7,454,759.
What flights does 71C027 operate?
Mode-S 71C027 has broadcast 20 distinct callsigns, including KAL428, KAL2001, KAL427, KAL2002, KAL868.