Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C003

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

Currently assigned to HL8003 · AIRBUS A-330-300

Hex
71C003
Octal
34340003
Decimal
7,454,723
Country
KR
Tail
HL8003
Type
A333
No current signal · last broadcast 46m ago
Flights observed
272
Distinct callsigns
20
Country
KR
Last broadcast
46m ago

Last known position

Most recent position reported by Mode-S 71C003.

Country allocation

The ICAO 24-bit address 71C003 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 - 40 2026-07-14
KAL427 - 26 2026-07-14
KAL2001 - 17 2026-07-12
KAL2011 - 15 2026-07-02
KAL2002 - 13 2026-07-13
KAL141 - 12 2026-07-15
KAL867 - 10 2026-07-02
KAL831 Korean Air 10 2026-05-29
KAL142 - 9 2026-07-12
KAL868 - 8 2026-06-24
KAL832 Korean Air 8 2026-05-30
KAL459 - 8 2026-07-07
KAL2012 - 8 2026-07-02
KAL648 - 7 2026-06-29
KAL441 Korean Air 7 2026-07-02
KAL647 - 6 2026-06-28
KAL460 - 6 2026-07-05
KAL458 Korean Air 5 2026-05-23
KAL658 Korean Air 4 2026-05-09
KAL657 Korean Air 4 2026-05-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 KAL141 - Jul 15, 00:40 UTCJul 15, 00:45 UTC5m
2026-07-14 KAL428 - Jul 14, 15:45 UTCJul 14, 21:40 UTC5h 55m
2026-07-14 KAL427 - Jul 14, 07:50 UTCJul 14, 13:45 UTC5h 55m
2026-07-13 KAL892 - Jul 13, 10:15 UTCJul 14, 02:55 UTC16h 40m
2026-07-13 KAL2002 HKG → ICN Jul 13, 04:50 UTCJul 13, 08:05 UTC3h 15m
2026-07-12 KAL2001 ICN → HKG Jul 12, 23:25 UTCJul 13, 02:30 UTC3h 5m
2026-07-12 KAL142 - Jul 12, 07:25 UTCJul 12, 07:45 UTC20m
2026-07-12 KAL141 - Jul 12, 00:50 UTCJul 12, 06:40 UTC5h 50m
2026-07-11 KAL428 - Jul 11, 16:30 UTCJul 11, 22:40 UTC6h 10m
2026-07-11 KAL427 - Jul 11, 08:01 UTCJul 11, 14:35 UTC6h 35m
2026-07-11 KAL706 - Jul 11, 00:30 UTCJul 11, 02:30 UTC2h 0m
2026-07-10 KAL705 ICN → NRT Jul 10, 10:05 UTCJul 10, 12:00 UTC1h 55m
2026-07-10 KAL142 - Jul 10, 07:40 UTCJul 10, 08:00 UTC20m
2026-07-10 KAL141 - Jul 10, 00:35 UTCJul 10, 01:00 UTC25m
2026-07-09 KAL428 - Jul 9, 15:50 UTCJul 9, 21:50 UTC6h 0m
2026-07-09 KAL427 - Jul 9, 07:35 UTCJul 9, 13:25 UTC5h 50m
2026-07-09 KAL788 - Jul 9, 02:10 UTCJul 9, 03:30 UTC1h 20m
2026-07-08 KAL787 - Jul 8, 23:30 UTCJul 9, 00:25 UTC55m
2026-07-08 KAL836 - Jul 8, 08:45 UTCJul 8, 09:30 UTC45m
2026-07-07 KAL835 - Jul 7, 23:55 UTCJul 8, 00:35 UTC40m
2026-07-07 KAL459 ICN → ICN Jul 7, 09:45 UTCJul 7, 20:10 UTC10h 25m
2026-07-07 KAL166 - Jul 7, 06:40 UTCJul 7, 06:55 UTC15m
2026-07-07 KAL165 - Jul 7, 00:20 UTCJul 7, 00:45 UTC25m
2026-07-06 KAL428 KUL → ICN Jul 6, 19:05 UTCJul 6, 22:05 UTC3h 0m
2026-07-06 KAL428 KUL → ICN Jul 6, 15:45 UTCJul 6, 16:00 UTC15m
2026-07-06 KAL427 - Jul 6, 07:40 UTCJul 6, 13:35 UTC5h 55m
2026-07-05 KAL460 - Jul 5, 09:45 UTCJul 5, 20:20 UTC10h 35m
2026-07-05 KAL142 - Jul 5, 07:15 UTCJul 5, 07:35 UTC20m
2026-07-05 KAL141 - Jul 5, 00:30 UTCJul 5, 00:55 UTC25m
2026-07-04 KAL428 KUL → ICN Jul 4, 17:10 UTCJul 4, 21:45 UTC4h 35m
2026-07-04 KAL428 KUL → ICN Jul 4, 15:45 UTCJul 4, 16:00 UTC15m
2026-07-04 KAL427 - Jul 4, 07:55 UTCJul 4, 13:40 UTC5h 45m
2026-07-03 KAL442 - Jul 3, 05:35 UTCJul 3, 09:10 UTC3h 35m
2026-07-02 KAL441 ICN → HAN Jul 2, 23:20 UTCJul 3, 03:05 UTC3h 45m
2026-07-02 KAL2012 - Jul 2, 17:05 UTCJul 2, 20:15 UTC3h 10m
2026-07-02 KAL2011 - Jul 2, 14:05 UTCJul 2, 14:20 UTC15m
2026-07-02 KAL2011 - Jul 2, 11:15 UTCJul 2, 13:30 UTC2h 15m
2026-07-02 KAL867 - Jul 2, 00:15 UTCJul 2, 08:15 UTC8h 0m
2026-07-01 KAL428 KUL → ICN Jul 1, 18:45 UTCJul 1, 21:35 UTC2h 50m
2026-07-01 KAL428 KUL → ICN Jul 1, 15:35 UTCJul 1, 15:45 UTC10m
2026-07-01 KAL427 - Jul 1, 07:50 UTCJul 1, 13:40 UTC5h 50m
2026-07-01 KAL788 - Jul 1, 01:50 UTCJul 1, 02:55 UTC1h 5m
2026-06-30 KAL787 ICN → FUK Jun 30, 23:25 UTCJul 1, 00:10 UTC45m
2026-06-30 KAL459 ICN → ICN Jun 30, 09:45 UTCJun 30, 20:10 UTC10h 25m
2026-06-30 KAL166 - Jun 30, 06:30 UTCJun 30, 06:55 UTC25m
2026-06-30 KAL165 - Jun 30, 00:20 UTCJun 30, 00:35 UTC15m
2026-06-29 KAL428 KUL → ICN Jun 29, 15:54 UTCJun 29, 21:54 UTC6h 0m
2026-06-29 KAL427 - Jun 29, 08:04 UTCJun 29, 13:49 UTC5h 45m
2026-06-29 KAL648 - Jun 29, 02:59 UTCJun 29, 05:40 UTC2h 40m
2026-06-28 KAL647 - Jun 28, 20:14 UTCJun 28, 20:29 UTC15m

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 HL8003 page for operator, model, and routing details .

Mode-S 71C003 frequently asked

What is Mode-S code 71C003?
71C003 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8003.
Where is Mode-S 71C003 registered?
Mode-S code 71C003 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 71C003 broadcasting right now?
No active broadcast right now. Last signal was 46m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C003, octal 34340003, decimal 7,454,723.
What flights does 71C003 operate?
Mode-S 71C003 has broadcast 20 distinct callsigns, including KAL428, KAL427, KAL2001, KAL2011, KAL2002.