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 2h ago
Flights observed
237
Distinct callsigns
20
Country
KR
Last broadcast
2h ago

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 - 27 2026-07-12
KAL2001 - 22 2026-07-09
KAL427 - 21 2026-07-12
KAL2002 - 15 2026-07-10
KAL867 - 13 2026-07-14
KAL868 - 12 2026-07-11
KAL459 - 11 2026-07-13
KAL2011 - 11 2026-07-08
KAL648 - 9 2026-06-25
KAL441 Korean Air 8 2026-05-15
KAL2012 - 8 2026-07-08
KAL831 Korean Air 7 2026-06-11
KAL647 - 6 2026-06-24
KAL142 - 6 2026-07-13
KAL141 - 6 2026-07-13
KAL832 Korean Air 5 2026-06-12
KAL460 - 5 2026-07-10
KAL752 Korean Air 4 2026-04-27
KAL751 Korean Air 4 2026-04-27
KAL658 Korean Air 3 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL867 - Jul 14, 00:15 UTCJul 14, 01:00 UTC45m
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
2026-07-07 KAL2002 HKG → ICN Jul 7, 05:25 UTCJul 7, 08:35 UTC3h 10m
2026-07-06 KAL2001 ICN → HKG Jul 6, 23:55 UTCJul 7, 03:20 UTC3h 25m
2026-07-06 KAL2012 HKG → ICN Jul 6, 16:55 UTCJul 6, 20:20 UTC3h 25m
2026-07-06 KAL2011 - Jul 6, 11:05 UTCJul 6, 14:15 UTC3h 10m
2026-07-06 KAL868 - Jul 6, 08:25 UTCJul 6, 09:15 UTC50m
2026-07-06 KAL867 - Jul 6, 00:40 UTCJul 6, 01:25 UTC45m
2026-07-05 KAL2002 HKG → ICN Jul 5, 04:45 UTCJul 5, 08:00 UTC3h 15m
2026-07-05 KAL2001 ICN → HKG Jul 5, 02:30 UTCJul 5, 02:45 UTC15m
2026-07-04 KAL2001 ICN → HKG Jul 4, 23:40 UTCJul 5, 01:55 UTC2h 15m
2026-07-04 KAL2012 - Jul 4, 16:50 UTCJul 4, 19:55 UTC3h 5m
2026-07-04 KAL2011 - Jul 4, 14:10 UTCJul 4, 14:30 UTC20m
2026-07-04 KAL2011 - Jul 4, 11:20 UTCJul 4, 13:35 UTC2h 15m
2026-07-04 KAL2002 HKG → ICN Jul 4, 04:40 UTCJul 4, 07:45 UTC3h 5m
2026-07-04 KAL2001 ICN → HKG Jul 4, 02:10 UTCJul 4, 02:30 UTC20m
2026-07-03 KAL2001 ICN → HKG Jul 3, 23:25 UTCJul 4, 01:35 UTC2h 10m
2026-07-03 KAL868 - Jul 3, 07:25 UTCJul 3, 07:45 UTC20m
2026-07-03 KAL867 - Jul 3, 00:15 UTCJul 3, 01:05 UTC50m
2026-07-02 KAL460 - Jul 2, 20:50 UTCJul 2, 21:10 UTC20m
2026-07-02 KAL459 - Jul 2, 10:05 UTCJul 2, 17:55 UTC7h 50m
2026-07-02 KAL2002 HKG → ICN Jul 2, 04:40 UTCJul 2, 07:45 UTC3h 5m
2026-07-02 KAL2001 ICN → HKG Jul 2, 02:10 UTCJul 2, 02:30 UTC20m
2026-07-01 KAL2001 ICN → HKG Jul 1, 23:20 UTCJul 2, 01:35 UTC2h 15m
2026-07-01 KAL459 ICN → ICN Jul 1, 09:55 UTCJul 1, 20:10 UTC10h 15m
2026-07-01 KAL142 - Jul 1, 07:15 UTCJul 1, 07:40 UTC25m
2026-07-01 KAL141 - Jul 1, 00:35 UTCJul 1, 06:20 UTC5h 45m
2026-06-30 KAL2042 - Jun 30, 07:30 UTCJun 30, 08:00 UTC30m
2026-06-30 KAL2041 - Jun 30, 00:09 UTCJun 30, 01:40 UTC1h 31m
2026-06-29 KAL460 - Jun 29, 11:25 UTCJun 29, 20:24 UTC9h 0m
2026-06-29 KAL459 - Jun 29, 09:44 UTCJun 29, 10:20 UTC35m
2026-06-29 KAL142 - Jun 29, 07:20 UTCJun 29, 07:44 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 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 2h ago.
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, KAL867.