Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

71C025

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

Currently assigned to HL8025 · AIRBUS A-330-300

Hex
71C025
Octal
34340045
Decimal
7,454,757
Country
KR
Tail
HL8025
Type
A333
No current signal · last broadcast 14d ago
Flights observed
189
Distinct callsigns
20
Country
KR
Last broadcast
14d ago

Last known position

Most recent position reported by Mode-S 71C025.

Country allocation

The ICAO 24-bit address 71C025 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 22 2026-06-24
KAL428 Korean Air 19 2026-06-26
KAL2002 - 15 2026-06-25
KAL868 - 12 2026-06-27
KAL867 - 12 2026-06-27
KAL459 - 12 2026-06-21
KAL427 - 12 2026-06-26
KAL832 - 8 2026-06-26
KAL831 - 8 2026-06-25
KAL460 - 7 2026-06-21
KAL2011 - 6 2026-06-28
KAL141 - 6 2026-06-24
KAL441 Korean Air 5 2026-06-22
KAL142 - 5 2026-06-24
KAL648 - 4 2026-06-19
KAL2012 - 4 2026-06-28
KAL752 Korean Air 3 2026-04-24
KAL751 Korean Air 3 2026-04-24
KAL658 - 3 2026-04-14
KAL647 - 3 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-29 KAL399F ICN → SGN Jun 29, 03:34 UTCJun 29, 09:40 UTC6h 5m
2026-06-28 KAL2012 - Jun 28, 17:04 UTCJun 28, 20:09 UTC3h 5m
2026-06-28 KAL2011 - Jun 28, 13:55 UTCJun 28, 14:09 UTC15m
2026-06-28 KAL2011 - Jun 28, 11:09 UTCJun 28, 13:19 UTC2h 10m
2026-06-27 KAL892 ICN → ICN Jun 27, 10:40 UTCJun 28, 02:44 UTC16h 5m
2026-06-27 KAL868 - Jun 27, 07:19 UTCJun 27, 07:55 UTC35m
2026-06-27 KAL867 - Jun 27, 00:14 UTCJun 27, 01:04 UTC50m
2026-06-26 KAL428 KUL → ICN Jun 26, 18:49 UTCJun 26, 21:24 UTC2h 35m
2026-06-26 KAL428 KUL → ICN Jun 26, 15:39 UTCJun 26, 15:49 UTC10m
2026-06-26 KAL427 - Jun 26, 07:55 UTCJun 26, 13:45 UTC5h 50m
2026-06-26 KAL832 - Jun 26, 03:50 UTCJun 26, 04:10 UTC20m
2026-06-25 KAL831 - Jun 25, 23:44 UTCJun 26, 00:05 UTC20m
2026-06-25 KAL2012 - Jun 25, 17:09 UTCJun 25, 20:30 UTC3h 20m
2026-06-25 KAL2011 ICN → HKG Jun 25, 11:15 UTCJun 25, 14:24 UTC3h 10m
2026-06-25 KAL2002 HKG → ICN Jun 25, 04:35 UTCJun 25, 07:45 UTC3h 10m
2026-06-24 KAL2001 ICN → HKG Jun 24, 23:40 UTCJun 25, 02:39 UTC3h 0m
2026-06-24 KAL142 - Jun 24, 07:05 UTCJun 24, 07:30 UTC25m
2026-06-24 KAL141 - Jun 24, 00:44 UTCJun 24, 06:15 UTC5h 30m
2026-06-23 KAL428 KUL → ICN Jun 23, 18:50 UTCJun 23, 21:49 UTC3h 0m
2026-06-23 KAL428 KUL → ICN Jun 23, 15:40 UTCJun 23, 15:55 UTC15m
2026-06-23 KAL427 - Jun 23, 07:35 UTCJun 23, 13:29 UTC5h 55m
2026-06-23 KAL832 - Jun 23, 04:39 UTCJun 23, 05:04 UTC25m
2026-06-23 KAL831 - Jun 23, 00:39 UTCJun 23, 01:10 UTC30m
2026-06-22 KAL442 - Jun 22, 07:34 UTCJun 22, 11:09 UTC3h 35m
2026-06-22 KAL441 ICN → HAN Jun 22, 01:35 UTCJun 22, 05:20 UTC3h 45m
2026-06-21 KAL460 - Jun 21, 11:15 UTCJun 21, 20:14 UTC9h 0m
2026-06-21 KAL459 - Jun 21, 09:44 UTCJun 21, 10:25 UTC40m
2026-06-21 KAL166 - Jun 21, 06:24 UTCJun 21, 06:50 UTC25m
2026-06-21 KAL165 - Jun 21, 00:04 UTCJun 21, 00:25 UTC20m
2026-06-20 KAL868 - Jun 20, 07:14 UTCJun 20, 07:54 UTC40m
2026-06-20 KAL867 - Jun 20, 00:24 UTCJun 20, 01:09 UTC45m
2026-06-19 KAL428 KUL → ICN Jun 19, 18:49 UTCJun 19, 21:34 UTC2h 45m
2026-06-19 KAL428 KUL → ICN Jun 19, 15:34 UTCJun 19, 15:49 UTC15m
2026-06-19 KAL427 - Jun 19, 07:45 UTCJun 19, 13:39 UTC5h 55m
2026-06-19 KAL648 - Jun 19, 02:54 UTCJun 19, 05:49 UTC2h 55m
2026-06-18 KAL648 - Jun 18, 23:50 UTCJun 19, 00:00 UTC10m
2026-06-18 KAL647 - Jun 18, 14:50 UTCJun 18, 17:40 UTC2h 50m
2026-06-18 KAL868 - Jun 18, 07:45 UTCJun 18, 08:25 UTC40m
2026-06-18 KAL867 - Jun 18, 00:05 UTCJun 18, 00:55 UTC50m
2026-06-17 KAL459 ICN → ICN Jun 17, 09:55 UTCJun 17, 20:05 UTC10h 10m
2026-06-17 KAL888 - Jun 17, 06:55 UTCJun 17, 07:35 UTC40m
2026-06-17 KAL887 - Jun 17, 02:30 UTCJun 17, 02:55 UTC25m
2026-06-16 KAL868 - Jun 16, 00:24 UTCJun 16, 08:05 UTC7h 40m
2026-06-15 KAL459 ICN → ICN Jun 15, 10:05 UTCJun 15, 20:04 UTC10h 0m
2026-06-15 KAL142 XIY → ICN Jun 15, 07:05 UTCJun 15, 07:29 UTC25m
2026-06-15 KAL141 ICN → XIY Jun 15, 00:24 UTCJun 15, 00:45 UTC20m
2026-06-13 KAL2028 TPE → ICN Jun 13, 11:45 UTCJun 13, 13:35 UTC1h 50m
2026-06-13 KAL2027 ICN → TPE Jun 13, 08:00 UTCJun 13, 10:05 UTC2h 5m
2026-06-13 KAL648 SIN → ICN Jun 13, 03:00 UTCJun 13, 05:55 UTC2h 54m
2026-06-12 KAL647 ICN → SIN Jun 12, 15:00 UTCJun 12, 20:50 UTC5h 50m

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 HL8025 page for operator, model, and routing details .

Mode-S 71C025 frequently asked

What is Mode-S code 71C025?
71C025 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8025.
Where is Mode-S 71C025 registered?
Mode-S code 71C025 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 71C025 broadcasting right now?
No active broadcast right now. Last signal was 14d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C025, octal 34340045, decimal 7,454,757.
What flights does 71C025 operate?
Mode-S 71C025 has broadcast 20 distinct callsigns, including KAL2001, KAL428, KAL2002, KAL868, KAL867.