Apparatus

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sensors Mode-S transponder

71C574

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

Currently assigned to HL8754 · BOEING 787-10 Dreamliner

Hex
71C574
Octal
34342564
Decimal
7,456,116
Country
KR
Tail
HL8754
Type
B78X
Broadcasting now · callsign KAL071 · 37,000 ft
Flights observed
236
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 19:10 UTC

Current position

71C574 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71C574 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
KAL072 - 13 2026-07-02
KAL076 Korean Air 12 2026-07-26
KAL075 Korean Air 12 2026-07-25
KAL042 Korean Air 12 2026-07-21
KAL041 Korean Air 12 2026-07-21
KAL054 Korean Air 11 2026-07-25
KAL053 Korean Air 10 2026-07-24
KAL882 - 9 2026-07-18
KAL071 - 9 2026-07-02
KAL023 - 9 2026-07-05
KAL970 Korean Air 8 2026-07-21
KAL969 Korean Air 7 2026-07-20
KAL927 - 7 2026-07-17
KAL2021 Korean Air 7 2026-07-23
KAL024 - 7 2026-07-05
KAL928 Korean Air 6 2026-07-17
KAL434 Korean Air 6 2026-07-22
KAL402 Korean Air 6 2026-07-23
KAL401 Korean Air 6 2026-07-23
KAL724 - 5 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL076 YVR → ICN Jul 26, 08:05 UTCJul 26, 19:10 UTC11h 5m
2026-07-25 KAL075 ICN → YVR Jul 25, 14:25 UTCJul 25, 23:55 UTC9h 30m
2026-07-25 KAL054 HNL → ICN Jul 25, 06:35 UTCJul 25, 08:45 UTC2h 10m
2026-07-24 KAL054 HNL → ICN Jul 24, 23:40 UTCJul 24, 23:50 UTC10m
2026-07-24 KAL053 ICN → HNL Jul 24, 20:10 UTCJul 24, 20:30 UTC20m
2026-07-24 KAL053 ICN → HNL Jul 24, 12:30 UTCJul 24, 14:10 UTC1h 40m
2026-07-23 KAL402 SYD → ICN Jul 23, 22:35 UTCJul 24, 08:40 UTC10h 5m
2026-07-23 KAL401 ICN → SYD Jul 23, 10:40 UTCJul 23, 20:25 UTC9h 45m
2026-07-23 KAL2022 TPE → ICN Jul 23, 05:40 UTCJul 23, 07:40 UTC2h 0m
2026-07-23 KAL2021 ICN → TPE Jul 23, 03:50 UTCJul 23, 04:05 UTC15m
2026-07-23 KAL2021 ICN → TPE Jul 23, 02:05 UTCJul 23, 02:40 UTC35m
2026-07-22 KAL434 DPS → ICN Jul 22, 11:20 UTCJul 23, 00:25 UTC13h 5m
2026-07-21 KAL042 SEA → ICN Jul 21, 20:40 UTCJul 22, 05:25 UTC8h 45m
2026-07-21 KAL041 ICN → SEA Jul 21, 08:10 UTCJul 21, 17:50 UTC9h 40m
2026-07-21 KAL970 PRG → ICN Jul 21, 03:20 UTCJul 21, 03:40 UTC20m
2026-07-20 KAL970 PRG → ICN Jul 20, 17:25 UTCJul 21, 02:30 UTC9h 5m
2026-07-20 KAL969 ICN → PRG Jul 20, 04:00 UTCJul 20, 15:00 UTC11h 0m
2026-07-20 KAL969 ICN → PRG Jul 20, 02:50 UTCJul 20, 03:10 UTC20m
2026-07-19 KAL434 DPS → ICN Jul 19, 23:15 UTCJul 19, 23:55 UTC40m
2026-07-19 KAL433 - Jul 19, 09:20 UTCJul 19, 22:25 UTC13h 5m
2026-07-18 KAL882 - Jul 18, 23:55 UTCJul 19, 05:45 UTC5h 50m
2026-07-18 KAL448 HAN → ICN Jul 18, 19:30 UTCJul 18, 20:10 UTC40m
2026-07-18 KAL447 - Jul 18, 10:35 UTCJul 18, 11:15 UTC40m
2026-07-17 KAL928 MXP → ICN Jul 17, 20:35 UTCJul 18, 06:55 UTC10h 21m
2026-07-17 KAL927 - Jul 17, 06:25 UTCJul 17, 18:00 UTC11h 35m
2026-07-17 KAL927 - Jul 17, 05:15 UTCJul 17, 05:35 UTC20m
2026-07-16 KAL076 YVR → ICN Jul 16, 08:15 UTCJul 16, 18:29 UTC10h 15m
2026-07-15 KAL075 ICN → YVR Jul 15, 14:05 UTCJul 15, 23:40 UTC9h 35m
2026-07-14 KAL076 YVR → ICN Jul 14, 08:35 UTCJul 14, 19:05 UTC10h 30m
2026-07-13 KAL075 ICN → YVR Jul 13, 14:05 UTCJul 13, 23:40 UTC9h 35m
2026-07-13 KAL412 - Jul 13, 09:50 UTCJul 13, 10:50 UTC1h 0m
2026-07-12 KAL412 - Jul 12, 23:15 UTCJul 12, 23:25 UTC10m
2026-07-12 KAL411 - Jul 12, 19:50 UTCJul 12, 20:10 UTC20m
2026-07-12 KAL411 - Jul 12, 09:25 UTCJul 12, 10:20 UTC55m
2026-07-12 KAL918 - Jul 12, 04:30 UTCJul 12, 04:50 UTC20m
2026-07-11 KAL918 - Jul 11, 18:05 UTCJul 12, 03:40 UTC9h 35m
2026-07-11 KAL917 - Jul 11, 04:05 UTCJul 11, 15:30 UTC11h 25m
2026-07-11 KAL917 - Jul 11, 02:50 UTCJul 11, 03:10 UTC20m
2026-07-10 KAL434 - Jul 10, 09:25 UTCJul 11, 00:45 UTC15h 20m
2026-07-09 KAL882 - Jul 9, 23:40 UTCJul 10, 05:20 UTC5h 40m
2026-07-09 KAL2022 - Jul 9, 05:45 UTCJul 9, 07:50 UTC2h 5m
2026-07-09 KAL2021 ICN → TPE Jul 9, 01:55 UTCJul 9, 03:55 UTC2h 0m
2026-07-08 KAL076 YVR → ICN Jul 8, 08:15 UTCJul 8, 19:05 UTC10h 50m
2026-07-07 KAL075 - Jul 7, 13:55 UTCJul 7, 23:05 UTC9h 10m
2026-07-06 KAL402 SYD → ICN Jul 6, 22:45 UTCJul 7, 08:50 UTC10h 5m
2026-07-06 KAL401 ICN → SYD Jul 6, 10:55 UTCJul 6, 20:30 UTC9h 35m
2026-07-05 KAL024 - Jul 5, 20:40 UTCJul 6, 08:35 UTC11h 55m
2026-07-05 KAL023 ICN → SFO Jul 5, 07:30 UTCJul 5, 17:30 UTC10h 0m
2026-07-05 KAL882 - Jul 5, 04:30 UTCJul 5, 05:10 UTC40m
2026-07-04 KAL881 - Jul 4, 23:55 UTCJul 5, 00:30 UTC35m

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 HL8754 page for operator, model, and routing details .

Mode-S 71C574 frequently asked

What is Mode-S code 71C574?
71C574 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8754.
Where is Mode-S 71C574 registered?
Mode-S code 71C574 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 71C574 broadcasting right now?
Yes. Mode-S 71C574 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C574, octal 34342564, decimal 7,456,116.
What flights does 71C574 operate?
Mode-S 71C574 has broadcast 20 distinct callsigns, including KAL072, KAL076, KAL075, KAL042, KAL041.