Apparatus

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sensors Mode-S transponder

71BD84

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

Currently assigned to HL7584 · AIRBUS A-330-300

Hex
71BD84
Octal
34336604
Decimal
7,454,084
Country
KR
Tail
HL7584
Type
A333
No current signal · last broadcast Jul 26, 13:10 UTC
Flights observed
378
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 13:10 UTC

Last known position

Most recent position reported by Mode-S 71BD84.

Country allocation

The ICAO 24-bit address 71BD84 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
KAL2118 Korean Air 31 2026-06-04
KAL2117 Korean Air 28 2026-06-04
KAL2057 Korean Air 25 2026-06-04
KAL836 Korean Air 22 2026-07-25
KAL442 - 13 2026-07-19
KAL441 - 13 2026-07-22
KAL1244 Korean Air 13 2026-06-10
KAL1188 Korean Air 13 2026-06-09
KAL835 Korean Air 12 2026-07-25
KAL2027 Korean Air 12 2026-07-24
KAL1312 Korean Air 12 2026-06-10
KAL1246 Korean Air 12 2026-06-09
KAL1177 Korean Air 12 2026-06-10
KAL1121 Korean Air 12 2026-06-09
KAL1113 Korean Air 12 2026-06-10
KAL1055 Korean Air 12 2026-06-09
KAL2106 Korean Air 11 2026-06-10
KAL2105 Korean Air 11 2026-06-09
KAL2058 Korean Air 10 2026-06-03
KAL864 - 9 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAL457 ICN → DAD Jul 26, 03:10 UTCJul 26, 13:10 UTC10h 1m
2026-07-25 KAL624 MNL → ICN Jul 25, 16:10 UTCJul 25, 19:45 UTC3h 35m
2026-07-25 KAL623 ICN → MNL Jul 25, 10:35 UTCJul 25, 13:55 UTC3h 20m
2026-07-25 KAL836 SZX → ICN Jul 25, 07:25 UTCJul 25, 08:10 UTC45m
2026-07-25 KAL836 SZX → ICN Jul 25, 05:10 UTCJul 25, 05:20 UTC10m
2026-07-25 KAL835 ICN → SZX Jul 25, 00:00 UTCJul 25, 00:45 UTC45m
2026-07-24 KAL2028 - Jul 24, 11:00 UTCJul 24, 13:10 UTC2h 10m
2026-07-24 KAL2027 ICN → TPE Jul 24, 09:05 UTCJul 24, 09:35 UTC30m
2026-07-24 KAL2027 ICN → TPE Jul 24, 07:30 UTCJul 24, 08:00 UTC30m
2026-07-24 KAL832 SHE → ICN Jul 24, 04:05 UTCJul 24, 04:25 UTC20m
2026-07-23 KAL831 ICN → SHE Jul 23, 23:45 UTCJul 24, 00:10 UTC25m
2026-07-23 KAL836 SZX → ICN Jul 23, 07:40 UTCJul 23, 08:20 UTC40m
2026-07-23 KAL836 SZX → ICN Jul 23, 05:15 UTCJul 23, 05:25 UTC10m
2026-07-23 KAL835 ICN → SZX Jul 23, 00:00 UTCJul 23, 00:35 UTC35m
2026-07-22 KAL441 - Jul 22, 02:55 UTCJul 22, 03:10 UTC15m
2026-07-21 KAL441 - Jul 21, 23:35 UTCJul 22, 02:10 UTC2h 35m
2026-07-21 KAL2028 TPE → ICN Jul 21, 11:10 UTCJul 21, 13:20 UTC2h 10m
2026-07-21 KAL2027 - Jul 21, 09:10 UTCJul 21, 09:40 UTC30m
2026-07-21 KAL2027 - Jul 21, 07:30 UTCJul 21, 08:10 UTC40m
2026-07-21 KAL832 - Jul 21, 03:40 UTCJul 21, 04:00 UTC20m
2026-07-20 KAL831 - Jul 20, 23:25 UTCJul 20, 23:55 UTC29m
2026-07-20 KAL2028 TPE → ICN Jul 20, 11:05 UTCJul 20, 13:20 UTC2h 15m
2026-07-20 KAL2027 ICN → TPE Jul 20, 07:40 UTCJul 20, 09:40 UTC2h 0m
2026-07-20 KAL832 - Jul 20, 03:55 UTCJul 20, 04:15 UTC20m
2026-07-19 KAL831 - Jul 19, 23:40 UTCJul 20, 00:15 UTC35m
2026-07-19 KAL442 - Jul 19, 09:30 UTCJul 19, 10:05 UTC35m
2026-07-18 KAL441 - Jul 18, 23:25 UTCJul 19, 02:00 UTC2h 35m
2026-07-18 KAL2012 HKG → ICN Jul 18, 17:00 UTCJul 18, 20:10 UTC3h 10m
2026-07-18 KAL2011 ICN → HKG Jul 18, 11:15 UTCJul 18, 14:05 UTC2h 50m
2026-07-18 KAL836 - Jul 18, 07:30 UTCJul 18, 08:10 UTC40m
2026-07-18 KAL835 - Jul 18, 00:15 UTCJul 18, 01:00 UTC45m
2026-07-17 KAL836 - Jul 17, 07:40 UTCJul 17, 08:15 UTC35m
2026-07-17 KAL836 - Jul 17, 05:15 UTCJul 17, 05:25 UTC10m
2026-07-17 KAL835 - Jul 17, 00:14 UTCJul 17, 01:00 UTC45m
2026-07-16 KAL459 ICN → ICN Jul 16, 10:00 UTCJul 16, 20:15 UTC10h 15m
2026-07-16 KAL2042 - Jul 16, 07:30 UTCJul 16, 07:55 UTC25m
2026-07-16 KAL2041 - Jul 16, 01:25 UTCJul 16, 01:45 UTC20m
2026-07-16 KAL2041 - Jul 16, 00:10 UTCJul 16, 00:35 UTC25m
2026-07-15 KAL864 - Jul 15, 18:40 UTCJul 15, 19:05 UTC25m
2026-07-15 KAL864 - Jul 15, 17:45 UTCJul 15, 17:55 UTC10m
2026-07-15 KAL863 - Jul 15, 11:40 UTCJul 15, 12:05 UTC25m
2026-07-15 KAL442 - Jul 15, 08:55 UTCJul 15, 09:35 UTC40m
2026-07-15 KAL442 - Jul 15, 05:40 UTCJul 15, 05:50 UTC10m
2026-07-14 KAL441 - Jul 14, 23:20 UTCJul 15, 02:10 UTC2h 50m
2026-07-14 KAL460 ICN → ICN Jul 14, 09:50 UTCJul 14, 20:25 UTC10h 35m
2026-07-14 KAL888 - Jul 14, 02:45 UTCJul 14, 07:45 UTC5h 0m
2026-07-13 KAL868 - Jul 13, 00:15 UTCJul 13, 08:15 UTC8h 0m
2026-07-12 KAL752 HND → ICN Jul 12, 17:15 UTCJul 12, 19:05 UTC1h 50m
2026-07-12 KAL751 - Jul 12, 11:50 UTCJul 12, 13:50 UTC2h 0m
2026-07-12 KAL442 - Jul 12, 08:55 UTCJul 12, 09:20 UTC25m

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 HL7584 page for operator, model, and routing details .

Mode-S 71BD84 frequently asked

What is Mode-S code 71BD84?
71BD84 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7584.
Where is Mode-S 71BD84 registered?
Mode-S code 71BD84 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 71BD84 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BD84, octal 34336604, decimal 7,454,084.
What flights does 71BD84 operate?
Mode-S 71BD84 has broadcast 20 distinct callsigns, including KAL2118, KAL2117, KAL2057, KAL836, KAL442.