Apparatus

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sensors Mode-S transponder

71BD85

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

Currently assigned to HL7585 · AIRBUS A-330-300

Hex
71BD85
Octal
34336605
Decimal
7,454,085
Country
KR
Tail
HL7585
Type
A333
No current signal · last broadcast 8h ago
Flights observed
280
Distinct callsigns
20
Country
KR
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 71BD85.

Country allocation

The ICAO 24-bit address 71BD85 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 - 27 2026-07-14
KAL835 - 17 2026-07-14
KAL1121 - 16 2026-07-10
KAL2106 - 15 2026-07-11
KAL2105 - 15 2026-07-10
KAL1312 Korean Air 15 2026-07-11
KAL1244 - 15 2026-07-11
KAL1177 - 15 2026-07-11
KAL1055 - 15 2026-07-10
KAL1246 - 14 2026-07-10
KAL1188 - 14 2026-07-10
KAL1113 - 14 2026-07-11
KAL864 - 13 2026-07-13
KAL863 - 10 2026-07-13
KAL458 Korean Air 9 2026-06-01
KAL457 Korean Air 5 2026-06-07
KAL442 - 5 2026-07-13
KAL441 - 4 2026-07-12
KAL2028 Korean Air 4 2026-06-10
KAL2027 Korean Air 4 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KAL705 - Jul 14, 10:45 UTCJul 14, 12:40 UTC1h 55m
2026-07-14 KAL836 - Jul 14, 08:10 UTCJul 14, 08:55 UTC45m
2026-07-14 KAL835 - Jul 14, 00:10 UTCJul 14, 00:50 UTC40m
2026-07-13 KAL864 - Jul 13, 19:00 UTCJul 13, 19:20 UTC20m
2026-07-13 KAL864 - Jul 13, 17:50 UTCJul 13, 18:00 UTC10m
2026-07-13 KAL863 - Jul 13, 11:40 UTCJul 13, 12:00 UTC20m
2026-07-13 KAL442 - Jul 13, 08:50 UTCJul 13, 09:30 UTC40m
2026-07-13 KAL442 - Jul 13, 05:40 UTCJul 13, 05:50 UTC10m
2026-07-12 KAL441 - Jul 12, 23:15 UTCJul 13, 00:01 UTC45m
2026-07-12 KAL836 - Jul 12, 08:10 UTCJul 12, 08:35 UTC25m
2026-07-12 KAL836 - Jul 12, 05:15 UTCJul 12, 05:25 UTC10m
2026-07-12 KAL835 - Jul 12, 00:01 UTCJul 12, 00:20 UTC20m
2026-07-11 KAL195P - Jul 11, 13:55 UTCJul 11, 14:10 UTC15m
2026-07-11 KAL1312 CJU → GMP Jul 11, 12:30 UTCJul 11, 12:55 UTC25m
2026-07-11 KAL1177 - Jul 11, 09:30 UTCJul 11, 10:05 UTC35m
2026-07-11 KAL1244 - Jul 11, 07:30 UTCJul 11, 08:10 UTC40m
2026-07-11 KAL1113 - Jul 11, 04:45 UTCJul 11, 05:20 UTC35m
2026-07-11 KAL2106 HND → GMP Jul 11, 00:50 UTCJul 11, 02:45 UTC1h 55m
2026-07-10 KAL2105 GMP → HND Jul 10, 09:55 UTCJul 10, 12:05 UTC2h 10m
2026-07-10 KAL1246 - Jul 10, 07:05 UTCJul 10, 07:45 UTC40m
2026-07-10 KAL1121 - Jul 10, 04:50 UTCJul 10, 05:25 UTC35m
2026-07-10 KAL1188 - Jul 10, 02:55 UTCJul 10, 03:30 UTC35m
2026-07-10 KAL1055 - Jul 10, 00:25 UTCJul 10, 01:00 UTC35m
2026-07-09 KAL1312 CJU → GMP Jul 9, 11:35 UTCJul 9, 12:10 UTC35m
2026-07-09 KAL1177 - Jul 9, 09:20 UTCJul 9, 09:55 UTC35m
2026-07-09 KAL1244 - Jul 9, 07:25 UTCJul 9, 08:05 UTC40m
2026-07-09 KAL1113 - Jul 9, 04:50 UTCJul 9, 05:25 UTC35m
2026-07-09 KAL2106 HND → GMP Jul 9, 00:55 UTCJul 9, 02:50 UTC1h 55m
2026-07-08 KAL2105 GMP → HND Jul 8, 10:00 UTCJul 8, 12:00 UTC2h 0m
2026-07-08 KAL1246 - Jul 8, 07:10 UTCJul 8, 07:55 UTC45m
2026-07-08 KAL1121 - Jul 8, 04:55 UTCJul 8, 05:35 UTC40m
2026-07-08 KAL2106 HND → GMP Jul 8, 00:40 UTCJul 8, 02:35 UTC1h 55m
2026-07-07 KAL2105 - Jul 7, 10:10 UTCJul 7, 11:55 UTC1h 45m
2026-07-07 KAL1246 - Jul 7, 07:10 UTCJul 7, 07:45 UTC35m
2026-07-07 KAL1121 - Jul 7, 04:45 UTCJul 7, 05:20 UTC35m
2026-07-07 KAK1188 - Jul 7, 02:45 UTCJul 7, 03:25 UTC40m
2026-07-07 KAL1055 - Jul 7, 00:25 UTCJul 7, 01:05 UTC40m
2026-07-06 KAL1312 CJU → GMP Jul 6, 11:15 UTCJul 6, 11:55 UTC40m
2026-07-06 KAL1177 - Jul 6, 09:10 UTCJul 6, 09:45 UTC35m
2026-07-06 KAK1244 - Jul 6, 07:10 UTCJul 6, 07:55 UTC45m
2026-07-06 KAL1113 - Jul 6, 04:35 UTCJul 6, 05:10 UTC35m
2026-07-06 KAL2106 HND → GMP Jul 6, 00:50 UTCJul 6, 02:45 UTC1h 55m
2026-07-05 KAL2105 GMP → HND Jul 5, 10:20 UTCJul 5, 12:05 UTC1h 45m
2026-07-05 KAL1246 - Jul 5, 07:40 UTCJul 5, 08:20 UTC40m
2026-07-05 KAL1121 - Jul 5, 05:00 UTCJul 5, 05:35 UTC35m
2026-07-05 KAL1188 - Jul 5, 02:45 UTCJul 5, 03:30 UTC45m
2026-07-05 KAL1055 - Jul 5, 00:25 UTCJul 5, 01:00 UTC35m
2026-07-04 KAL1312 CJU → GMP Jul 4, 11:00 UTCJul 4, 11:35 UTC35m
2026-07-04 KAL1177 - Jul 4, 08:45 UTCJul 4, 09:20 UTC35m
2026-07-04 KAL1244 - Jul 4, 06:55 UTCJul 4, 07:30 UTC35m

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 HL7585 page for operator, model, and routing details .

Mode-S 71BD85 frequently asked

What is Mode-S code 71BD85?
71BD85 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7585.
Where is Mode-S 71BD85 registered?
Mode-S code 71BD85 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 71BD85 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BD85, octal 34336605, decimal 7,454,085.
What flights does 71BD85 operate?
Mode-S 71BD85 has broadcast 20 distinct callsigns, including KAL836, KAL835, KAL1121, KAL2106, KAL2105.