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 Jul 26, 11:55 UTC
Flights observed
249
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 11:55 UTC

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
KAL2106 Korean Air 13 2026-07-25
KAL2105 Korean Air 13 2026-07-26
KAL1177 Korean Air 13 2026-07-25
KAL1312 Korean Air 12 2026-07-25
KAL1113 Korean Air 12 2026-07-25
KAL1244 Korean Air 11 2026-07-25
KAL1121 Korean Air 11 2026-07-26
KAL1055 Korean Air 11 2026-07-26
KAL2027 - 10 2026-07-09
KAL1246 Korean Air 10 2026-07-26
KAL1188 Korean Air 10 2026-07-26
KAL835 - 9 2026-07-04
KAL2028 - 9 2026-07-09
KAL864 Korean Air 7 2026-05-30
KAL863 Korean Air 6 2026-05-30
KAL141 Korean Air 6 2026-05-14
KAL843 Korean Air 4 2026-05-23
KAL2118 Korean Air 4 2026-04-19
KAL882 Korean Air 3 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL2105 GMP → HND Jul 26, 10:05 UTCJul 26, 11:50 UTC1h 45m
2026-07-26 KAL1246 CJU → GMP Jul 26, 07:20 UTCJul 26, 08:05 UTC45m
2026-07-26 KAL1121 GMP → CJU Jul 26, 04:45 UTCJul 26, 05:15 UTC30m
2026-07-26 KAL1188 CJU → GMP Jul 26, 02:50 UTCJul 26, 03:30 UTC40m
2026-07-26 KAL1055 GMP → CJU Jul 26, 00:30 UTCJul 26, 01:00 UTC30m
2026-07-25 KAL1312 CJU → GMP Jul 25, 11:30 UTCJul 25, 12:10 UTC40m
2026-07-25 KAL1177 GMP → CJU Jul 25, 09:20 UTCJul 25, 09:50 UTC30m
2026-07-25 KAL1244 CJU → GMP Jul 25, 07:15 UTCJul 25, 08:00 UTC45m
2026-07-25 KAL1113 GMP → CJU Jul 25, 04:50 UTCJul 25, 05:25 UTC35m
2026-07-25 KAL2106 HND → GMP Jul 25, 00:40 UTCJul 25, 02:30 UTC1h 50m
2026-07-24 KAL2105 GMP → HND Jul 24, 10:30 UTCJul 24, 12:30 UTC2h 0m
2026-07-24 KAL1246 CJU → GMP Jul 24, 08:15 UTCJul 24, 08:55 UTC40m
2026-07-24 KAL1121 GMP → CJU Jul 24, 05:45 UTCJul 24, 06:20 UTC35m
2026-07-24 KAL1188 CJU → GMP Jul 24, 03:30 UTCJul 24, 04:10 UTC40m
2026-07-24 KAL1055 GMP → CJU Jul 24, 00:35 UTCJul 24, 01:05 UTC30m
2026-07-23 KAL1312 CJU → GMP Jul 23, 11:05 UTCJul 23, 11:45 UTC40m
2026-07-23 KAL1177 - Jul 23, 08:45 UTCJul 23, 09:20 UTC35m
2026-07-23 KAL1244 - Jul 23, 06:50 UTCJul 23, 07:35 UTC45m
2026-07-23 KAL1113 GMP → CJU Jul 23, 04:35 UTCJul 23, 05:10 UTC35m
2026-07-23 KAL2106 HND → GMP Jul 23, 00:50 UTCJul 23, 02:40 UTC1h 50m
2026-07-22 KAL2105 - Jul 22, 10:20 UTCJul 22, 11:50 UTC1h 30m
2026-07-22 KAL1121 GMP → CJU Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-22 KAL1188 CJU → GMP Jul 22, 02:50 UTCJul 22, 03:25 UTC35m
2026-07-22 KAL1055 GMP → CJU Jul 22, 00:30 UTCJul 22, 01:00 UTC30m
2026-07-21 KAL1312 CJU → GMP Jul 21, 11:55 UTCJul 21, 12:30 UTC35m
2026-07-21 KAL1177 - Jul 21, 09:35 UTCJul 21, 10:10 UTC35m
2026-07-21 KAL1244 - Jul 21, 07:20 UTCJul 21, 08:00 UTC40m
2026-07-21 KAL1113 GMP → CJU Jul 21, 04:45 UTCJul 21, 05:25 UTC40m
2026-07-21 KAL2106 HND → GMP Jul 21, 01:00 UTCJul 21, 02:50 UTC1h 50m
2026-07-20 KAL2105 GMP → HND Jul 20, 10:00 UTCJul 20, 11:55 UTC1h 55m
2026-07-20 KAL1244 - Jul 20, 07:25 UTCJul 20, 08:05 UTC40m
2026-07-20 KAL1121 - Jul 20, 04:45 UTCJul 20, 05:25 UTC40m
2026-07-20 KAL1188 - Jul 20, 02:50 UTCJul 20, 03:20 UTC30m
2026-07-20 KAL1055 GMP → CJU Jul 20, 00:25 UTCJul 20, 01:00 UTC35m
2026-07-19 KAL1312 CJU → GMP Jul 19, 11:45 UTCJul 19, 12:20 UTC35m
2026-07-19 KAL1177 - Jul 19, 09:30 UTCJul 19, 10:05 UTC35m
2026-07-19 KAL1244 - Jul 19, 06:45 UTCJul 19, 07:20 UTC35m
2026-07-19 KAL1113 - Jul 19, 04:25 UTCJul 19, 05:00 UTC35m
2026-07-19 KAL2106 HND → GMP Jul 19, 00:35 UTCJul 19, 02:25 UTC1h 50m
2026-07-18 KAL2105 GMP → HND Jul 18, 10:00 UTCJul 18, 11:55 UTC1h 55m
2026-07-18 KAL1246 - Jul 18, 07:15 UTCJul 18, 08:00 UTC45m
2026-07-18 KAL1121 - Jul 18, 04:55 UTCJul 18, 05:30 UTC35m
2026-07-18 KAL1188 - Jul 18, 02:55 UTCJul 18, 03:40 UTC45m
2026-07-18 KAL1055 - Jul 18, 00:35 UTCJul 18, 01:10 UTC35m
2026-07-17 KAL1312 CJU → GMP Jul 17, 11:10 UTCJul 17, 11:50 UTC40m
2026-07-17 KAL1177 - Jul 17, 08:59 UTCJul 17, 09:35 UTC35m
2026-07-17 KAL1244 - Jul 17, 06:54 UTCJul 17, 07:30 UTC35m
2026-07-17 KAL1113 - Jul 17, 04:35 UTCJul 17, 05:10 UTC35m
2026-07-17 KAL2106 HND → GMP Jul 17, 00:50 UTCJul 17, 02:34 UTC1h 45m
2026-07-16 KAL2105 GMP → HND Jul 16, 10:35 UTCJul 16, 12:30 UTC1h 55m

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 Jul 26, 11:55 UTC.
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, KAL2106, KAL2105, KAL1177, KAL1312.