Apparatus

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sensors Mode-S transponder

71C571

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

Currently assigned to HL8571 · BOEING 787-10 Dreamliner

Hex
71C571
Octal
34342561
Decimal
7,456,113
Country
KR
Tail
HL8571
Type
B78X
No current signal · last broadcast 1h ago
Flights observed
250
Distinct callsigns
20
Country
KR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 71C571.

Country allocation

The ICAO 24-bit address 71C571 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
KAL2104 - 24 2026-07-14
KAL2103 - 23 2026-07-14
KAL2102 - 23 2026-07-14
KAL2101 - 23 2026-07-14
KAL928 - 16 2026-06-13
KAL927 Korean Air 16 2026-06-12
KAL076 Korean Air 10 2026-05-23
KAL072 - 8 2026-06-15
KAL053 - 8 2026-06-16
KAL071 - 7 2026-06-15
KAL434 Korean Air 6 2026-06-05
KAL402 - 6 2026-06-18
KAL964 Korean Air 5 2026-06-07
KAL401 - 5 2026-06-18
KAL075 Korean Air 5 2026-05-22
KAL024 Korean Air 5 2026-06-10
KAL918 Korean Air 4 2026-06-05
KAL917 Korean Air 4 2026-06-04
KAL448 Korean Air 4 2026-06-01
KAL054 - 4 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL2104 HND → GMP Jul 14, 11:35 UTCJul 14, 13:40 UTC2h 5m
2026-07-14 KAL2103 GMP → HND Jul 14, 08:00 UTCJul 14, 09:55 UTC1h 55m
2026-07-14 KAL2102 HND → GMP Jul 14, 04:35 UTCJul 14, 06:20 UTC1h 45m
2026-07-14 KAL2101 - Jul 14, 00:20 UTCJul 14, 02:35 UTC2h 15m
2026-07-13 KAL2104 HND → GMP Jul 13, 11:30 UTCJul 13, 13:20 UTC1h 50m
2026-07-13 KAL2103 GMP → HND Jul 13, 07:35 UTCJul 13, 09:25 UTC1h 50m
2026-07-13 KAL2102 HND → GMP Jul 13, 04:00 UTCJul 13, 05:50 UTC1h 50m
2026-07-13 KAL2101 GMP → HND Jul 13, 00:25 UTCJul 13, 02:15 UTC1h 50m
2026-07-12 KAL2104 HND → GMP Jul 12, 11:20 UTCJul 12, 13:01 UTC1h 40m
2026-07-12 KAL2103 GMP → HND Jul 12, 07:35 UTCJul 12, 09:30 UTC1h 55m
2026-07-12 KAL2102 HND → GMP Jul 12, 04:05 UTCJul 12, 05:55 UTC1h 50m
2026-07-12 KAL2101 GMP → HND Jul 12, 00:10 UTCJul 12, 02:01 UTC1h 50m
2026-07-11 KAL2104 HND → GMP Jul 11, 11:10 UTCJul 11, 12:50 UTC1h 40m
2026-07-11 KAL2103 GMP → HND Jul 11, 07:40 UTCJul 11, 09:30 UTC1h 50m
2026-07-11 KAL2102 HND → GMP Jul 11, 03:55 UTCJul 11, 05:40 UTC1h 45m
2026-07-11 KAL2101 GMP → HND Jul 11, 00:15 UTCJul 11, 02:00 UTC1h 45m
2026-07-10 KAL2104 HND → GMP Jul 10, 11:10 UTCJul 10, 13:00 UTC1h 50m
2026-07-10 KAL2103 GMP → HND Jul 10, 07:40 UTCJul 10, 09:25 UTC1h 45m
2026-07-10 KAL2102 HND → GMP Jul 10, 03:55 UTCJul 10, 05:50 UTC1h 55m
2026-07-10 KAL2101 GMP → HND Jul 10, 00:15 UTCJul 10, 02:00 UTC1h 45m
2026-07-09 KAL2104 HND → GMP Jul 9, 11:15 UTCJul 9, 13:05 UTC1h 50m
2026-07-09 KAL2103 GMP → HND Jul 9, 07:35 UTCJul 9, 09:35 UTC2h 0m
2026-07-09 KAL2102 HND → GMP Jul 9, 03:55 UTCJul 9, 05:45 UTC1h 50m
2026-07-09 KAL2101 GMP → HND Jul 9, 00:20 UTCJul 9, 02:10 UTC1h 50m
2026-07-08 KAL2104 HND → GMP Jul 8, 11:05 UTCJul 8, 13:00 UTC1h 55m
2026-07-08 KAL2103 GMP → HND Jul 8, 07:35 UTCJul 8, 09:30 UTC1h 55m
2026-07-08 KAL2102 HND → GMP Jul 8, 04:05 UTCJul 8, 06:05 UTC2h 0m
2026-07-08 KAL2101 GMP → HND Jul 8, 00:50 UTCJul 8, 02:25 UTC1h 35m
2026-07-07 KAL2104 HND → GMP Jul 7, 11:05 UTCJul 7, 13:00 UTC1h 55m
2026-07-07 KAL2103 GMP → HND Jul 7, 07:40 UTCJul 7, 09:25 UTC1h 45m
2026-07-07 KAL2102 HND → GMP Jul 7, 04:00 UTCJul 7, 05:50 UTC1h 50m
2026-07-07 KAL2101 GMP → HND Jul 7, 00:15 UTCJul 7, 01:55 UTC1h 40m
2026-07-06 KAL2104 HND → GMP Jul 6, 11:25 UTCJul 6, 13:15 UTC1h 50m
2026-07-06 KAL2103 GMP → HND Jul 6, 07:30 UTCJul 6, 09:10 UTC1h 40m
2026-07-06 KAL2102 HND → GMP Jul 6, 03:55 UTCJul 6, 05:50 UTC1h 55m
2026-07-06 KAL2101 GMP → HND Jul 6, 00:20 UTCJul 6, 02:10 UTC1h 50m
2026-07-05 KAL2104 HND → GMP Jul 5, 11:15 UTCJul 5, 13:10 UTC1h 55m
2026-07-05 KAL2103 GMP → HND Jul 5, 07:40 UTCJul 5, 09:30 UTC1h 50m
2026-07-05 KAL2102 HND → GMP Jul 5, 03:55 UTCJul 5, 05:55 UTC2h 0m
2026-07-05 KAL2101 GMP → HND Jul 5, 00:15 UTCJul 5, 02:00 UTC1h 45m
2026-07-04 KAL2104 HND → GMP Jul 4, 11:05 UTCJul 4, 12:55 UTC1h 50m
2026-07-04 KAL2103 GMP → HND Jul 4, 07:35 UTCJul 4, 09:15 UTC1h 40m
2026-07-04 KAL2102 HND → GMP Jul 4, 03:50 UTCJul 4, 05:40 UTC1h 50m
2026-07-04 KAL2101 GMP → HND Jul 4, 00:20 UTCJul 4, 01:55 UTC1h 35m
2026-07-03 KAL2104 HND → GMP Jul 3, 11:20 UTCJul 3, 13:05 UTC1h 45m
2026-07-03 KAL2103 GMP → HND Jul 3, 07:55 UTCJul 3, 09:30 UTC1h 35m
2026-07-03 KAL2102 HND → GMP Jul 3, 03:55 UTCJul 3, 05:45 UTC1h 50m
2026-07-03 KAL2101 GMP → HND Jul 3, 00:25 UTCJul 3, 02:00 UTC1h 35m
2026-07-02 KAL2104 HND → GMP Jul 2, 11:25 UTCJul 2, 13:10 UTC1h 45m
2026-07-02 KAL2103 GMP → HND Jul 2, 07:30 UTCJul 2, 09:05 UTC1h 35m

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 HL8571 page for operator, model, and routing details .

Mode-S 71C571 frequently asked

What is Mode-S code 71C571?
71C571 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8571.
Where is Mode-S 71C571 registered?
Mode-S code 71C571 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 71C571 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C571, octal 34342561, decimal 7,456,113.
What flights does 71C571 operate?
Mode-S 71C571 has broadcast 20 distinct callsigns, including KAL2104, KAL2103, KAL2102, KAL2101, KAL928.