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 Jul 26, 19:40 UTC
Flights observed
314
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 19:40 UTC

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 Korean Air 11 2026-07-20
KAL458 Korean Air 10 2026-07-25
KAL2027 - 10 2026-07-23
KAL442 Korean Air 9 2026-07-26
KAL441 Korean Air 9 2026-07-26
KAL2028 - 8 2026-07-23
KAL457 Korean Air 6 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL2046 UBN → ICN Jul 26, 19:10 UTCJul 26, 19:40 UTC30m
2026-07-26 KAL2045 ICN → UBN Jul 26, 11:55 UTCJul 26, 13:20 UTC1h 25m
2026-07-26 KAL442 HAN → ICN Jul 26, 05:25 UTCJul 26, 09:10 UTC3h 46m
2026-07-26 KAL441 ICN → HAN Jul 26, 03:05 UTCJul 26, 03:15 UTC10m
2026-07-25 KAL441 ICN → HAN Jul 25, 23:20 UTCJul 25, 23:50 UTC30m
2026-07-25 KAL458 DAD → ICN Jul 25, 13:25 UTCJul 25, 13:50 UTC25m
2026-07-25 KAL457 ICN → DAD Jul 25, 03:15 UTCJul 25, 10:35 UTC7h 20m
2026-07-24 KAL442 HAN → ICN Jul 24, 09:00 UTCJul 24, 09:45 UTC45m
2026-07-23 KAL441 ICN → HAN Jul 23, 23:25 UTCJul 24, 00:10 UTC45m
2026-07-23 KAL2028 - Jul 23, 11:10 UTCJul 23, 13:15 UTC2h 5m
2026-07-23 KAL2027 - Jul 23, 09:10 UTCJul 23, 09:30 UTC20m
2026-07-23 KAL2027 - Jul 23, 07:35 UTCJul 23, 08:00 UTC25m
2026-07-22 KAL892 PVG → ICN Jul 22, 11:10 UTCJul 23, 03:20 UTC16h 10m
2026-07-22 KAL832 SHE → ICN Jul 22, 03:40 UTCJul 22, 04:10 UTC30m
2026-07-21 KAL831 - Jul 21, 23:20 UTCJul 22, 00:00 UTC40m
2026-07-21 KAL442 - Jul 21, 05:25 UTCJul 21, 09:25 UTC4h 0m
2026-07-20 KAL441 - Jul 20, 23:20 UTCJul 21, 00:05 UTC44m
2026-07-20 KAL863 ICN → PEK Jul 20, 11:20 UTCJul 20, 19:15 UTC7h 55m
2026-07-20 KAL442 - Jul 20, 08:45 UTCJul 20, 09:25 UTC40m
2026-07-19 KAL441 - Jul 19, 23:40 UTCJul 20, 00:25 UTC45m
2026-07-19 KAL2028 TPE → ICN Jul 19, 11:50 UTCJul 19, 13:55 UTC2h 5m
2026-07-19 KAL2027 ICN → TPE Jul 19, 07:55 UTCJul 19, 10:15 UTC2h 20m
2026-07-18 KAL891 ICN → ICN Jul 18, 10:10 UTCJul 19, 02:50 UTC16h 40m
2026-07-18 KAL2022 - Jul 18, 05:35 UTCJul 18, 07:40 UTC2h 5m
2026-07-18 KAL2021 ICN → TPE Jul 18, 03:45 UTCJul 18, 04:00 UTC15m
2026-07-18 KAL2021 ICN → TPE Jul 18, 02:00 UTCJul 18, 02:45 UTC45m
2026-07-17 KAL2028 TPE → ICN Jul 17, 11:04 UTCJul 17, 13:10 UTC2h 5m
2026-07-17 KAL2027 ICN → TPE Jul 17, 07:44 UTCJul 17, 09:50 UTC2h 5m
2026-07-16 KAL891 ICN → ICN Jul 16, 10:20 UTCJul 17, 02:59 UTC16h 40m
2026-07-16 KAL887 - Jul 16, 02:35 UTCJul 16, 08:15 UTC5h 40m
2026-07-15 KAL2028 - Jul 15, 11:10 UTCJul 15, 13:10 UTC2h 0m
2026-07-15 KAL2027 - Jul 15, 09:25 UTCJul 15, 09:40 UTC15m
2026-07-15 KAL2027 - Jul 15, 07:40 UTCJul 15, 08:15 UTC35m
2026-07-15 KAL706 - Jul 15, 00:55 UTCJul 15, 02:55 UTC2h 0m
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

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 Jul 26, 19:40 UTC.
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.