Apparatus

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sensors Mode-S transponder

71BD87

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

Currently assigned to HL7587 · AIRBUS A-330-300

Hex
71BD87
Octal
34336607
Decimal
7,454,087
Country
KR
Tail
HL7587
Type
A333
No current signal · last broadcast 5h ago
Flights observed
189
Distinct callsigns
20
Country
KR
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 71BD87.

Country allocation

The ICAO 24-bit address 71BD87 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
KAL836 - 14 2026-07-04
KAL2027 - 10 2026-07-09
KAL835 - 9 2026-07-04
KAL2028 - 9 2026-07-09
KAL2106 - 8 2026-07-14
KAL864 Korean Air 7 2026-05-30
KAL2105 - 7 2026-07-13
KAL1177 - 7 2026-07-14
KAL1113 - 7 2026-07-14
KAL863 Korean Air 6 2026-05-30
KAL141 Korean Air 6 2026-05-14
KAL1312 Korean Air 6 2026-07-14
KAL1246 - 5 2026-07-13
KAL1244 - 5 2026-07-14
KAL843 Korean Air 4 2026-05-23
KAL2118 Korean Air 4 2026-04-19
KAL1121 - 4 2026-07-12
KAL1055 - 4 2026-07-12
KAL882 Korean Air 3 2026-05-25
KAL844 Korean Air 3 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL1312 CJU → GMP Jul 14, 11:00 UTCJul 14, 11:45 UTC45m
2026-07-14 KAL1177 - Jul 14, 08:40 UTCJul 14, 09:15 UTC35m
2026-07-14 KAL1244 - Jul 14, 06:50 UTCJul 14, 07:30 UTC40m
2026-07-14 KAL1113 - Jul 14, 04:35 UTCJul 14, 05:10 UTC35m
2026-07-14 KAL2106 HND → GMP Jul 14, 00:55 UTCJul 14, 02:40 UTC1h 45m
2026-07-13 KAL2105 GMP → HND Jul 13, 10:55 UTCJul 13, 12:40 UTC1h 45m
2026-07-13 KAL1246 - Jul 13, 08:35 UTCJul 13, 09:15 UTC40m
2026-07-13 KAL1113 - Jul 13, 06:01 UTCJul 13, 06:45 UTC45m
2026-07-13 KAL2106 HND → GMP Jul 13, 01:40 UTCJul 13, 03:30 UTC1h 50m
2026-07-12 KAL2105 GMP → HND Jul 12, 11:05 UTCJul 12, 13:05 UTC2h 0m
2026-07-12 KAL1246 - Jul 12, 07:40 UTCJul 12, 08:25 UTC45m
2026-07-12 KAL1121 - Jul 12, 05:10 UTCJul 12, 05:45 UTC35m
2026-07-12 KAL1188 - Jul 12, 03:25 UTCJul 12, 04:05 UTC40m
2026-07-12 KAL1055 - Jul 12, 00:50 UTCJul 12, 01:25 UTC35m
2026-07-11 KAL194P ICN → GMP Jul 11, 22:35 UTCJul 11, 22:50 UTC15m
2026-07-11 KAL624 - Jul 11, 16:35 UTCJul 11, 19:55 UTC3h 20m
2026-07-11 KAL623 ICN → MNL Jul 11, 10:40 UTCJul 11, 14:30 UTC3h 50m
2026-07-10 KAL892 - Jul 10, 10:30 UTCJul 11, 02:45 UTC16h 16m
2026-07-10 KAL888 - Jul 10, 03:00 UTCJul 10, 08:10 UTC5h 10m
2026-07-09 KAL2028 - Jul 9, 11:35 UTCJul 9, 13:35 UTC2h 0m
2026-07-09 KAL2027 - Jul 9, 07:50 UTCJul 9, 10:05 UTC2h 15m
2026-07-09 KAL832 - Jul 9, 04:20 UTCJul 9, 04:40 UTC20m
2026-07-08 KAL831 - Jul 8, 23:20 UTCJul 8, 23:45 UTC25m
2026-07-08 KAL442 - Jul 8, 06:05 UTCJul 8, 10:05 UTC4h 0m
2026-07-07 KAL441 ICN → HAN Jul 7, 23:20 UTCJul 8, 02:00 UTC2h 40m
2026-07-07 KAL888 - Jul 7, 02:35 UTCJul 7, 07:35 UTC5h 0m
2026-07-06 KAL892 - Jul 6, 10:40 UTCJul 6, 11:20 UTC40m
2026-07-05 KAL891 - Jul 5, 10:35 UTCJul 5, 11:20 UTC45m
2026-07-05 KAL832 - Jul 5, 03:25 UTCJul 5, 03:55 UTC30m
2026-07-04 KAL831 - Jul 4, 23:35 UTCJul 5, 00:00 UTC25m
2026-07-04 KAL836 - Jul 4, 07:30 UTCJul 4, 08:10 UTC40m
2026-07-04 KAL836 - Jul 4, 05:15 UTCJul 4, 05:25 UTC10m
2026-07-04 KAL835 - Jul 4, 02:45 UTCJul 4, 02:55 UTC10m
2026-07-04 KAL835 - Jul 4, 00:05 UTCJul 4, 00:45 UTC40m
2026-07-03 KAL2028 - Jul 3, 11:15 UTCJul 3, 13:15 UTC2h 0m
2026-07-03 KAL2027 - Jul 3, 07:35 UTCJul 3, 07:45 UTC10m
2026-07-02 KAL891 ICN → ICN Jul 2, 10:25 UTCJul 3, 02:55 UTC16h 30m
2026-07-02 KAL622 - Jul 2, 04:45 UTCJul 2, 08:10 UTC3h 25m
2026-07-01 KAL621 - Jul 1, 23:05 UTCJul 2, 02:25 UTC3h 20m
2026-07-01 KAL198P PUS → ICN Jul 1, 07:40 UTCJul 1, 08:25 UTC45m
2026-05-31 KAL199F ICN → PUS May 31, 22:05 UTCMay 31, 22:30 UTC25m
2026-05-31 KAL2041 ICN → UBN May 31, 00:05 UTCMay 31, 00:25 UTC20m
2026-05-30 KAL864 PEK → ICN May 30, 18:50 UTCMay 30, 19:10 UTC20m
2026-05-30 KAL864 PEK → ICN May 30, 17:45 UTCMay 30, 17:55 UTC10m
2026-05-30 KAL863 ICN → PEK May 30, 11:30 UTCMay 30, 11:50 UTC20m
2026-05-30 KAL2042 UBN → ICN May 30, 07:40 UTCMay 30, 08:00 UTC20m
2026-05-30 KAL2041 ICN → UBN May 30, 00:05 UTCMay 30, 00:30 UTC25m
2026-05-29 KAL458 DAD → ICN May 29, 03:20 UTCMay 29, 13:05 UTC9h 45m
2026-05-28 KAL867 ICN → CAN May 28, 00:20 UTCMay 28, 08:00 UTC7h 40m
2026-05-27 KAL458 DAD → ICN May 27, 03:04 UTCMay 27, 13:30 UTC10h 26m

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 HL7587 page for operator, model, and routing details .

Mode-S 71BD87 frequently asked

What is Mode-S code 71BD87?
71BD87 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7587.
Where is Mode-S 71BD87 registered?
Mode-S code 71BD87 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 71BD87 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BD87, octal 34336607, decimal 7,454,087.
What flights does 71BD87 operate?
Mode-S 71BD87 has broadcast 20 distinct callsigns, including KAL836, KAL2027, KAL835, KAL2028, KAL2106.