Apparatus

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sensors Mode-S transponder

71C216

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

Currently assigned to HL8216 · BOEING 777-300ER

Hex
71C216
Octal
34341026
Decimal
7,455,254
Country
KR
Tail
HL8216
Type
B77W
No current signal · last broadcast Jul 26, 20:35 UTC
Flights observed
285
Distinct callsigns
11
Country
KR
Last broadcast
Jul 26, 20:35 UTC

Last known position

Most recent position reported by Mode-S 71C216.

Country allocation

The ICAO 24-bit address 71C216 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 11 distinct

Callsign Airline Flights Last seen
KAL643 Korean Air 130 2026-07-26
KAL644 Korean Air 116 2026-07-26
KAL788 - 15 2026-07-16
KAL787 - 15 2026-07-15
KAL888 Korean Air 2 2026-07-21
KAL2028 Korean Air 2 2026-05-26
KAL844 Korean Air 1 2026-06-02
KAL843 Korean Air 1 2026-06-02
KAL841 Korean Air 1 2026-05-09
KAL418 - 1 2026-07-07
KAL2027 Korean Air 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL644 SIN → ICN Jul 26, 17:30 UTCJul 26, 20:30 UTC3h 0m
2026-07-26 KAL643 ICN → SIN Jul 26, 10:40 UTCJul 26, 11:00 UTC20m
2026-07-26 KAL643 ICN → SIN Jul 26, 05:25 UTCJul 26, 08:00 UTC2h 36m
2026-07-25 KAL644 SIN → ICN Jul 25, 14:25 UTCJul 25, 20:40 UTC6h 15m
2026-07-25 KAL643 ICN → SIN Jul 25, 11:20 UTCJul 25, 11:30 UTC10m
2026-07-25 KAL643 ICN → SIN Jul 25, 05:15 UTCJul 25, 09:55 UTC4h 40m
2026-07-24 KAL644 SIN → ICN Jul 24, 15:40 UTCJul 24, 20:40 UTC5h 0m
2026-07-24 KAL643 ICN → SIN Jul 24, 11:15 UTCJul 24, 11:25 UTC10m
2026-07-24 KAL643 ICN → SIN Jul 24, 05:10 UTCJul 24, 09:55 UTC4h 45m
2026-07-23 KAL644 SIN → ICN Jul 23, 17:25 UTCJul 23, 20:15 UTC2h 50m
2026-07-23 KAL644 - Jul 23, 14:25 UTCJul 23, 14:35 UTC10m
2026-07-23 KAL643 ICN → SIN Jul 23, 05:20 UTCJul 23, 10:55 UTC5h 35m
2026-07-22 KAL644 - Jul 22, 17:25 UTCJul 22, 20:20 UTC2h 55m
2026-07-22 KAL644 - Jul 22, 14:25 UTCJul 22, 14:35 UTC10m
2026-07-21 KAL888 PVG → ICN Jul 21, 02:30 UTCJul 21, 07:55 UTC5h 25m
2026-07-20 KAL644 - Jul 20, 14:35 UTCJul 20, 20:10 UTC5h 35m
2026-07-20 KAL643 ICN → SIN Jul 20, 05:15 UTCJul 20, 10:45 UTC5h 30m
2026-07-19 KAL644 - Jul 19, 17:15 UTCJul 19, 20:00 UTC2h 45m
2026-07-19 KAL643 ICN → SIN Jul 19, 10:20 UTCJul 19, 10:40 UTC20m
2026-07-19 KAL643 ICN → SIN Jul 19, 05:05 UTCJul 19, 07:45 UTC2h 40m
2026-07-18 KAL644 - Jul 18, 14:25 UTCJul 18, 20:15 UTC5h 50m
2026-07-18 KAL643 - Jul 18, 10:50 UTCJul 18, 11:20 UTC30m
2026-07-18 KAL643 - Jul 18, 05:40 UTCJul 18, 08:10 UTC2h 30m
2026-07-17 KAL644 - Jul 17, 17:25 UTCJul 17, 20:15 UTC2h 50m
2026-07-17 KAL643 - Jul 17, 10:25 UTCJul 17, 10:55 UTC30m
2026-07-17 KAL643 - Jul 17, 05:15 UTCJul 17, 07:50 UTC2h 35m
2026-07-16 KAL644 - Jul 16, 17:14 UTCJul 16, 20:00 UTC2h 45m
2026-07-16 KAL643 - Jul 16, 10:35 UTCJul 16, 11:05 UTC30m
2026-07-16 KAL643 - Jul 16, 05:30 UTCJul 16, 08:05 UTC2h 35m
2026-07-16 KAL788 - Jul 16, 02:05 UTCJul 16, 03:00 UTC55m
2026-07-15 KAL787 - Jul 15, 23:30 UTCJul 16, 00:10 UTC40m
2026-07-15 KAL644 - Jul 15, 17:35 UTCJul 15, 20:30 UTC2h 55m
2026-07-15 KAL643 - Jul 15, 05:25 UTCJul 15, 10:55 UTC5h 30m
2026-07-13 KAL644 - Jul 13, 17:20 UTCJul 13, 20:00 UTC2h 40m
2026-07-13 KAL643 - Jul 13, 05:10 UTCJul 13, 09:35 UTC4h 25m
2026-07-12 KAL644 - Jul 12, 14:25 UTCJul 12, 20:15 UTC5h 50m
2026-07-12 KAL643 - Jul 12, 10:35 UTCJul 12, 11:10 UTC35m
2026-07-12 KAL643 - Jul 12, 05:25 UTCJul 12, 07:40 UTC2h 15m
2026-07-11 KAL644 - Jul 11, 16:55 UTCJul 11, 20:25 UTC3h 30m
2026-07-11 KAL643 - Jul 11, 05:05 UTCJul 11, 09:50 UTC4h 45m
2026-07-10 KAL644 - Jul 10, 20:10 UTCJul 10, 20:30 UTC20m
2026-07-10 KAL644 - Jul 10, 14:15 UTCJul 10, 17:05 UTC2h 50m
2026-07-10 KAL643 - Jul 10, 05:15 UTCJul 10, 10:55 UTC5h 40m
2026-07-09 KAL644 - Jul 9, 14:25 UTCJul 9, 20:10 UTC5h 45m
2026-07-09 KAL643 - Jul 9, 10:20 UTCJul 9, 11:00 UTC40m
2026-07-09 KAL643 - Jul 9, 05:20 UTCJul 9, 07:40 UTC2h 20m
2026-07-08 KAL644 - Jul 8, 17:35 UTCJul 8, 20:15 UTC2h 40m
2026-07-08 KAL644 - Jul 8, 14:25 UTCJul 8, 14:35 UTC10m
2026-07-08 KAL643 - Jul 8, 05:05 UTCJul 8, 09:45 UTC4h 40m
2026-07-07 KAL418 ICN → ICN Jul 7, 09:55 UTCJul 7, 20:00 UTC10h 5m

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 HL8216 page for operator, model, and routing details .

Mode-S 71C216 frequently asked

What is Mode-S code 71C216?
71C216 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL8216.
Where is Mode-S 71C216 registered?
Mode-S code 71C216 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 71C216 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71C216, octal 34341026, decimal 7,455,254.
What flights does 71C216 operate?
Mode-S 71C216 has broadcast 11 distinct callsigns, including KAL643, KAL644, KAL788, KAL787, KAL888.