Apparatus

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sensors Mode-S transponder

71C515

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

Currently assigned to HL8515 · BOEING 787-10 Dreamliner

Hex
71C515
Octal
34342425
Decimal
7,456,021
Country
KR
Tail
HL8515
Type
B78X
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
237
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S 71C515.

Country allocation

The ICAO 24-bit address 71C515 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
KAL041 - 15 2026-07-09
KAL042 - 14 2026-07-09
KAL053 - 13 2026-07-12
KAL928 Korean Air 11 2026-07-26
KAL724 - 11 2026-07-17
KAL723 Korean Air 11 2026-07-17
KAL023 - 11 2026-07-17
KAL927 Korean Air 10 2026-07-26
KAL447 Korean Air 10 2026-07-25
KAL402 Korean Air 10 2026-07-19
KAL401 - 10 2026-07-19
KAL054 - 10 2026-07-12
KAL024 Korean Air 10 2026-07-17
KAL970 Korean Air 9 2026-07-23
KAL448 Korean Air 9 2026-07-25
KAL969 Korean Air 8 2026-07-22
KAL434 - 7 2026-07-11
KAL938 - 6 2026-07-09
KAL937 - 5 2026-07-08
KAL882 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL928 MXP → ICN Jul 26, 20:40 UTCJul 26, 21:15 UTC35m
2026-07-26 KAL927 ICN → MXP Jul 26, 04:50 UTCJul 26, 17:15 UTC12h 26m
2026-07-25 KAL448 HAN → ICN Jul 25, 19:30 UTCJul 25, 20:15 UTC45m
2026-07-25 KAL448 HAN → ICN Jul 25, 16:35 UTCJul 25, 16:45 UTC10m
2026-07-25 KAL447 ICN → HAN Jul 25, 14:30 UTCJul 25, 14:40 UTC10m
2026-07-25 KAL447 ICN → HAN Jul 25, 10:55 UTCJul 25, 13:40 UTC2h 45m
2026-07-25 KAL928 MXP → ICN Jul 25, 07:50 UTCJul 25, 08:10 UTC20m
2026-07-24 KAL928 MXP → ICN Jul 24, 21:35 UTCJul 25, 06:55 UTC9h 20m
2026-07-24 KAL927 ICN → MXP Jul 24, 07:25 UTCJul 24, 19:10 UTC11h 45m
2026-07-24 KAL927 ICN → MXP Jul 24, 06:10 UTCJul 24, 06:35 UTC25m
2026-07-23 KAL970 PRG → ICN Jul 23, 03:25 UTCJul 23, 03:40 UTC15m
2026-07-22 KAL970 PRG → ICN Jul 22, 17:30 UTCJul 23, 02:30 UTC9h 0m
2026-07-22 KAL969 ICN → PRG Jul 22, 03:50 UTCJul 22, 14:40 UTC10h 50m
2026-07-22 KAL969 ICN → PRG Jul 22, 02:25 UTCJul 22, 02:50 UTC25m
2026-07-21 KAL704 NRT → ICN Jul 21, 05:20 UTCJul 21, 07:15 UTC1h 55m
2026-07-21 KAL703 ICN → NRT Jul 21, 01:25 UTCJul 21, 03:15 UTC1h 50m
2026-07-20 KAL468 - Jul 20, 11:35 UTCJul 20, 22:20 UTC10h 45m
2026-07-19 KAL402 SYD → ICN Jul 19, 22:40 UTCJul 20, 08:25 UTC9h 45m
2026-07-19 KAL401 ICN → SYD Jul 19, 10:45 UTCJul 19, 20:30 UTC9h 45m
2026-07-18 KAL402 SYD → ICN Jul 18, 22:55 UTCJul 19, 08:30 UTC9h 35m
2026-07-18 KAL401 ICN → SYD Jul 18, 10:40 UTCJul 18, 20:50 UTC10h 10m
2026-07-17 KAL024 SFO → ICN Jul 17, 20:40 UTCJul 18, 07:40 UTC11h 1m
2026-07-17 KAL023 ICN → SFO Jul 17, 07:40 UTCJul 17, 18:05 UTC10h 25m
2026-07-17 KAL724 - Jul 17, 04:14 UTCJul 17, 05:30 UTC1h 15m
2026-07-17 KAL723 ICN → KIX Jul 17, 01:05 UTCJul 17, 02:25 UTC1h 20m
2026-07-15 KAL402 SYD → ICN Jul 15, 22:20 UTCJul 16, 08:00 UTC9h 40m
2026-07-15 KAL401 ICN → SYD Jul 15, 10:45 UTCJul 15, 20:20 UTC9h 35m
2026-07-14 KAL024 SFO → ICN Jul 14, 21:10 UTCJul 15, 08:20 UTC11h 9m
2026-07-14 KAL023 ICN → SFO Jul 14, 07:50 UTCJul 14, 18:45 UTC10h 55m
2026-07-13 KAL882 - Jul 13, 23:55 UTCJul 14, 05:20 UTC5h 25m
2026-07-12 KAL054 - Jul 12, 23:25 UTCJul 13, 08:40 UTC9h 15m
2026-07-12 KAL053 - Jul 12, 12:40 UTCJul 12, 20:50 UTC8h 10m
2026-07-12 KAL887 - Jul 12, 05:25 UTCJul 12, 10:35 UTC5h 10m
2026-07-11 KAL434 ICN → ICN Jul 11, 09:40 UTCJul 12, 00:01 UTC14h 20m
2026-07-11 KAL724 KIX → ICN Jul 11, 03:55 UTCJul 11, 05:10 UTC1h 15m
2026-07-11 KAL723 ICN → KIX Jul 11, 00:50 UTCJul 11, 02:15 UTC1h 25m
2026-07-10 KAL448 - Jul 10, 20:00 UTCJul 10, 20:45 UTC45m
2026-07-10 KAL447 - Jul 10, 10:20 UTCJul 10, 11:00 UTC40m
2026-07-09 KAL042 SEA → ICN Jul 9, 20:40 UTCJul 10, 07:30 UTC10h 50m
2026-07-09 KAL041 ICN → SEA Jul 9, 08:10 UTCJul 9, 17:40 UTC9h 30m
2026-07-09 KAL938 - Jul 9, 02:15 UTCJul 9, 02:35 UTC20m
2026-07-08 KAL938 - Jul 8, 16:45 UTCJul 9, 01:30 UTC8h 45m
2026-07-08 KAL937 - Jul 8, 03:45 UTCJul 8, 14:35 UTC10h 50m
2026-07-08 KAL937 - Jul 8, 02:30 UTCJul 8, 02:45 UTC15m
2026-07-06 KAL042 SEA → ICN Jul 6, 20:40 UTCJul 7, 07:10 UTC10h 30m
2026-07-06 KAL041 ICN → SEA Jul 6, 08:05 UTCJul 6, 17:25 UTC9h 20m
2026-07-06 KAL724 KIX → ICN Jul 6, 04:20 UTCJul 6, 05:45 UTC1h 25m
2026-07-06 KAL723 - Jul 6, 01:20 UTCJul 6, 02:45 UTC1h 25m
2026-07-05 KAL468 CXR → ICN Jul 5, 11:15 UTCJul 5, 22:05 UTC10h 50m
2026-07-04 KAL054 - Jul 4, 23:25 UTCJul 5, 08:45 UTC9h 20m

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 HL8515 page for operator, model, and routing details .

Mode-S 71C515 frequently asked

What is Mode-S code 71C515?
71C515 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8515.
Where is Mode-S 71C515 registered?
Mode-S code 71C515 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 71C515 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C515, octal 34342425, decimal 7,456,021.
What flights does 71C515 operate?
Mode-S 71C515 has broadcast 20 distinct callsigns, including KAL041, KAL042, KAL053, KAL928, KAL724.