Apparatus

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sensors Mode-S transponder

71C559

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

Currently assigned to HL8559 · AIRBUS A-321neo

Hex
71C559
Octal
34342531
Decimal
7,456,089
Country
KR
Tail
HL8559
Type
A21N
No current signal · last broadcast Jul 26, 20:15 UTC
Flights observed
389
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 20:15 UTC

Last known position

Most recent position reported by Mode-S 71C559.

Country allocation

The ICAO 24-bit address 71C559 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
KAL2005 - 12 2026-07-15
KAL1406 Korean Air 12 2026-07-20
KAL737 - 11 2026-07-05
KAL2147 Korean Air 11 2026-07-26
KAL738 - 10 2026-07-05
KAL2148 Korean Air 10 2026-07-26
KAL2016 Korean Air 10 2026-07-25
KAL792 - 9 2026-07-14
KAL791 - 9 2026-07-14
KAL485 - 9 2026-07-10
KAL2006 - 9 2026-07-15
KAL1401 - 9 2026-07-11
KAL770 - 8 2026-07-21
KAL769 - 8 2026-07-21
KAL2174 Korean Air 8 2026-06-11
KAL2173 Korean Air 8 2026-06-11
KAL2172 Korean Air 8 2026-06-11
KAL1403 - 8 2026-06-29
KAL741 Korean Air 7 2026-05-25
KAL626 Korean Air 7 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL418 GUM → ICN Jul 26, 09:45 UTCJul 26, 20:15 UTC10h 30m
2026-07-26 KAL2148 OKA → ICN Jul 26, 05:20 UTCJul 26, 06:05 UTC45m
2026-07-26 KAL2148 OKA → ICN Jul 26, 04:15 UTCJul 26, 04:30 UTC15m
2026-07-26 KAL2147 ICN → OKA Jul 26, 00:45 UTCJul 26, 02:30 UTC1h 45m
2026-07-25 KAL626 CGK → ICN Jul 25, 17:40 UTCJul 25, 21:20 UTC3h 40m
2026-07-25 KAL625 ICN → CGK Jul 25, 12:10 UTCJul 25, 15:45 UTC3h 35m
2026-07-25 KAL2016 MFM → ICN Jul 25, 09:25 UTCJul 25, 10:05 UTC40m
2026-07-25 KAL2016 MFM → ICN Jul 25, 07:05 UTCJul 25, 07:25 UTC20m
2026-07-25 KAL2015 ICN → MFM Jul 25, 01:45 UTCJul 25, 02:30 UTC45m
2026-07-24 KAL876 - Jul 24, 12:45 UTCJul 24, 13:10 UTC25m
2026-07-24 KAL875 PUS → PVG Jul 24, 09:50 UTCJul 24, 10:20 UTC30m
2026-07-23 KAL164 DYG → ICN Jul 23, 11:00 UTCJul 23, 18:25 UTC7h 25m
2026-07-23 KAL2198 KIJ → ICN Jul 23, 04:15 UTCJul 23, 05:55 UTC1h 40m
2026-07-23 KAL2197 ICN → KIJ Jul 23, 01:05 UTCJul 23, 02:30 UTC1h 25m
2026-07-22 KAL690 PNH → ICN Jul 22, 11:10 UTCJul 22, 22:30 UTC11h 20m
2026-07-22 KAL855 ICN → PEK Jul 22, 03:50 UTCJul 22, 04:05 UTC15m
2026-07-22 KAL855 ICN → PEK Jul 22, 02:05 UTCJul 22, 02:30 UTC25m
2026-07-21 KAL770 - Jul 21, 07:45 UTCJul 21, 10:15 UTC2h 30m
2026-07-21 KAL769 ICN → CTS Jul 21, 03:55 UTCJul 21, 06:10 UTC2h 15m
2026-07-20 KAL1406 PUS → ICN Jul 20, 23:55 UTCJul 21, 00:45 UTC50m
2026-07-20 KAL2132 NRT → PUS Jul 20, 10:35 UTCJul 20, 12:10 UTC1h 35m
2026-07-20 KAL2131 PUS → NRT Jul 20, 07:10 UTCJul 20, 08:50 UTC1h 40m
2026-07-20 KAL2130 NRT → PUS Jul 20, 04:00 UTCJul 20, 05:40 UTC1h 40m
2026-07-20 KAL2129 PUS → NRT Jul 20, 01:00 UTCJul 20, 02:35 UTC1h 35m
2026-07-19 KAL1407 ICN → PUS Jul 19, 09:40 UTCJul 19, 10:30 UTC50m
2026-07-19 KAL166 - Jul 19, 06:15 UTCJul 19, 06:40 UTC25m
2026-07-19 KAL165 - Jul 19, 00:00 UTCJul 19, 00:30 UTC30m
2026-07-18 KAL626 - Jul 18, 17:30 UTCJul 18, 21:05 UTC3h 35m
2026-07-18 KAL625 ICN → MNL Jul 18, 12:10 UTCJul 18, 15:45 UTC3h 35m
2026-07-18 KAL770 - Jul 18, 07:35 UTCJul 18, 10:00 UTC2h 25m
2026-07-18 KAL769 ICN → CTS Jul 18, 03:50 UTCJul 18, 06:15 UTC2h 25m
2026-07-17 KAL458 ICN → ICN Jul 17, 03:05 UTCJul 17, 13:20 UTC10h 15m
2026-07-16 KAL656 - Jul 16, 22:15 UTCJul 17, 01:15 UTC3h 0m
2026-07-16 KAL655 - Jul 16, 17:20 UTCJul 16, 17:40 UTC20m
2026-07-16 KAL655 - Jul 16, 12:34 UTCJul 16, 15:25 UTC2h 50m
2026-07-16 KAL712 NRT → ICN Jul 16, 08:35 UTCJul 16, 10:29 UTC1h 55m
2026-07-16 KAL711 ICN → NRT Jul 16, 04:45 UTCJul 16, 06:45 UTC2h 0m
2026-07-15 KAL2006 HKG → ICN Jul 15, 11:25 UTCJul 15, 14:45 UTC3h 20m
2026-07-15 KAL2005 ICN → HKG Jul 15, 04:55 UTCJul 15, 08:05 UTC3h 10m
2026-07-14 KAL417 ICN → ICN Jul 14, 09:45 UTCJul 14, 20:20 UTC10h 35m
2026-07-14 KAL792 - Jul 14, 06:10 UTCJul 14, 07:10 UTC1h 0m
2026-07-14 KAL791 - Jul 14, 02:20 UTCJul 14, 03:20 UTC1h 0m
2026-07-13 KAL2006 - Jul 13, 10:20 UTCJul 13, 13:35 UTC3h 15m
2026-07-13 KAL2005 - Jul 13, 04:45 UTCJul 13, 07:55 UTC3h 10m
2026-07-13 KAL1406 PUS → ICN Jul 13, 00:05 UTCJul 13, 00:50 UTC45m
2026-07-12 KAL1407 ICN → PUS Jul 12, 09:50 UTCJul 12, 10:30 UTC40m
2026-07-12 KAL792 - Jul 12, 06:15 UTCJul 12, 07:15 UTC1h 0m
2026-07-12 KAL791 - Jul 12, 02:30 UTCJul 12, 03:15 UTC45m
2026-07-12 KAL1406 PUS → ICN Jul 12, 00:01 UTCJul 12, 00:45 UTC45m
2026-07-11 KAL1401 ICN → PUS Jul 11, 21:50 UTCJul 11, 22:30 UTC40m

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 HL8559 page for operator, model, and routing details .

Mode-S 71C559 frequently asked

What is Mode-S code 71C559?
71C559 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8559.
Where is Mode-S 71C559 registered?
Mode-S code 71C559 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 71C559 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C559, octal 34342531, decimal 7,456,089.
What flights does 71C559 operate?
Mode-S 71C559 has broadcast 20 distinct callsigns, including KAL2005, KAL1406, KAL737, KAL2147, KAL738.