Apparatus

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sensors Mode-S transponder

71BD78

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

Currently assigned to HL7578 · AIRBUS A-350-900

Hex
71BD78
Octal
34336570
Decimal
7,454,072
Country
KR
Tail
HL7578
Type
A359
No current signal · last broadcast Jul 26, 13:55 UTC
Flights observed
292
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 13:55 UTC

Last known position

Most recent position reported by Mode-S 71BD78.

Country allocation

The ICAO 24-bit address 71BD78 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
AAR542 Asiana Airlines 24 2026-07-26
AAR541 Asiana Airlines 21 2026-07-25
AAR511 Asiana Airlines 21 2026-07-21
AAR512 - 20 2026-07-21
AAR501 - 18 2026-07-12
AAR751 - 17 2026-07-15
AAR502 - 16 2026-07-13
AAR752 - 15 2026-07-15
AAR742 Asiana Airlines 10 2026-07-25
AAR761 Asiana Airlines 8 2026-06-12
AAR522 Asiana Airlines 8 2026-07-20
AAR521 - 8 2026-07-18
AAR762 - 7 2026-06-12
AAR741 Asiana Airlines 7 2026-07-24
AAR212 Asiana Airlines 7 2026-07-22
AAR211 Asiana Airlines 7 2026-07-23
AAR734 - 5 2026-07-07
AAR714 - 5 2026-06-19
AAR733 - 4 2026-07-07
AAR713 - 4 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAR105 NRT → ICN Jul 26, 12:00 UTCJul 26, 13:55 UTC1h 55m
2026-07-26 AAR106 ICN → NRT Jul 26, 07:40 UTCJul 26, 09:40 UTC2h 0m
2026-07-26 AAR542 FRA → ICN Jul 26, 04:30 UTCJul 26, 04:55 UTC25m
2026-07-25 AAR542 FRA → ICN Jul 25, 18:00 UTCJul 26, 03:45 UTC9h 45m
2026-07-25 AAR541 ICN → FRA Jul 25, 03:25 UTCJul 25, 14:40 UTC11h 15m
2026-07-25 AAR541 ICN → FRA Jul 25, 02:20 UTCJul 25, 02:40 UTC20m
2026-07-25 AAR742 BKK → ICN Jul 25, 00:05 UTCJul 25, 00:25 UTC20m
2026-07-24 AAR742 BKK → ICN Jul 24, 20:45 UTCJul 24, 23:15 UTC2h 30m
2026-07-24 AAR742 BKK → ICN Jul 24, 19:10 UTCJul 24, 19:25 UTC15m
2026-07-24 AAR741 ICN → BKK Jul 24, 11:10 UTCJul 24, 16:15 UTC5h 5m
2026-07-24 AAR712 TPE → ICN Jul 24, 06:00 UTCJul 24, 06:50 UTC50m
2026-07-24 AAR712 TPE → ICN Jul 24, 04:45 UTCJul 24, 05:00 UTC15m
2026-07-24 AAR711 ICN → TPE Jul 24, 01:55 UTCJul 24, 02:25 UTC30m
2026-07-24 AAR711 ICN → TPE Jul 24, 00:20 UTCJul 24, 00:50 UTC30m
2026-07-23 AAR211 SFO → ICN Jul 23, 06:55 UTCJul 23, 17:40 UTC10h 45m
2026-07-22 AAR212 ICN → SFO Jul 22, 12:55 UTCJul 22, 23:25 UTC10h 30m
2026-07-21 AAR512 - Jul 21, 19:20 UTCJul 21, 23:20 UTC4h 0m
2026-07-21 AAR511 ICN → BCN Jul 21, 04:55 UTCJul 21, 17:25 UTC12h 30m
2026-07-21 AAR511 ICN → BCN Jul 21, 03:40 UTCJul 21, 04:05 UTC25m
2026-07-20 AAR522 LHR → ICN Jul 20, 03:15 UTCJul 20, 03:45 UTC30m
2026-07-19 AAR522 LHR → ICN Jul 19, 16:25 UTCJul 20, 02:35 UTC10h 10m
2026-07-18 AAR521 ICN → LHR Jul 18, 23:50 UTCJul 19, 13:45 UTC13h 55m
2026-07-18 AAR203 LAX → ICN Jul 18, 06:30 UTCJul 18, 18:05 UTC11h 35m
2026-07-17 AAR204 - Jul 17, 13:10 UTCJul 18, 00:19 UTC11h 10m
2026-07-17 AAR562 FCO → ICN Jul 17, 05:45 UTCJul 17, 06:05 UTC20m
2026-07-16 AAR562 FCO → ICN Jul 16, 19:55 UTCJul 17, 04:54 UTC9h 0m
2026-07-16 AAR561 - Jul 16, 06:10 UTCJul 16, 17:25 UTC11h 15m
2026-07-16 AAR561 - Jul 16, 04:55 UTCJul 16, 05:15 UTC20m
2026-07-15 AAR752 - Jul 15, 18:35 UTCJul 15, 21:45 UTC3h 10m
2026-07-15 AAR751 - Jul 15, 12:40 UTCJul 15, 13:00 UTC20m
2026-07-15 AAR751 - Jul 15, 07:35 UTCJul 15, 10:10 UTC2h 35m
2026-07-15 AAR542 - Jul 15, 04:20 UTCJul 15, 04:50 UTC30m
2026-07-14 AAR542 - Jul 14, 18:05 UTCJul 15, 03:35 UTC9h 29m
2026-07-14 AAR541 - Jul 14, 03:50 UTCJul 14, 15:40 UTC11h 50m
2026-07-14 AAR541 - Jul 14, 02:25 UTCJul 14, 02:40 UTC15m
2026-07-13 AAR742 - Jul 13, 21:25 UTCJul 14, 00:15 UTC2h 50m
2026-07-13 AAR742 - Jul 13, 19:15 UTCJul 13, 19:30 UTC15m
2026-07-13 AAR741 - Jul 13, 11:05 UTCJul 13, 13:40 UTC2h 35m
2026-07-13 AAR502 - Jul 13, 04:20 UTCJul 13, 04:40 UTC20m
2026-07-12 AAR502 - Jul 12, 17:30 UTCJul 13, 03:25 UTC9h 55m
2026-07-12 AAR501 - Jul 12, 02:40 UTCJul 12, 14:50 UTC12h 10m
2026-07-12 AAR501 - Jul 12, 01:30 UTCJul 12, 01:45 UTC15m
2026-07-11 AAR752 - Jul 11, 17:30 UTCJul 11, 22:10 UTC4h 40m
2026-07-11 AAR751 - Jul 11, 13:50 UTCJul 11, 14:00 UTC10m
2026-07-11 AAR751 - Jul 11, 07:35 UTCJul 11, 12:20 UTC4h 45m
2026-07-11 AAR502 - Jul 11, 04:50 UTCJul 11, 05:10 UTC20m
2026-07-10 AAR502 - Jul 10, 18:00 UTCJul 11, 04:05 UTC10h 5m
2026-07-10 AAR501 - Jul 10, 02:50 UTCJul 10, 15:10 UTC12h 20m
2026-07-10 AAR501 - Jul 10, 01:30 UTCJul 10, 01:50 UTC20m
2026-07-09 AAR512 - Jul 9, 06:45 UTCJul 9, 07:00 UTC15m

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 HL7578 page for operator, model, and routing details .

Mode-S 71BD78 frequently asked

What is Mode-S code 71BD78?
71BD78 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7578.
Where is Mode-S 71BD78 registered?
Mode-S code 71BD78 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 71BD78 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BD78, octal 34336570, decimal 7,454,072.
What flights does 71BD78 operate?
Mode-S 71BD78 has broadcast 20 distinct callsigns, including AAR542, AAR541, AAR511, AAR512, AAR501.