Apparatus

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sensors Mode-S transponder

71BD79

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

Currently assigned to HL7579 · AIRBUS A-350-900

Hex
71BD79
Octal
34336571
Decimal
7,454,073
Country
KR
Tail
HL7579
Type
A359
No current signal · last broadcast 38m ago
Flights observed
229
Distinct callsigns
20
Country
KR
Last broadcast
38m ago

Last known position

Most recent position reported by Mode-S 71BD79.

Country allocation

The ICAO 24-bit address 71BD79 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
AAR511 - 14 2026-07-11
AAR522 - 12 2026-07-14
AAR512 - 12 2026-07-12
AAR502 - 12 2026-07-02
AAR212 - 12 2026-06-25
AAR211 - 11 2026-06-26
AAR762 - 10 2026-07-14
AAR761 - 10 2026-07-14
AAR501 - 10 2026-07-01
AAR752 Asiana Airlines 9 2026-07-02
AAR751 - 8 2026-07-02
AAR582 - 8 2026-06-14
AAR541 Asiana Airlines 8 2026-06-08
AAR581 Asiana Airlines 7 2026-06-13
AAR521 - 7 2026-07-13
AAR742 - 6 2026-06-20
AAR741 Asiana Airlines 6 2026-06-20
AAR548 - 6 2026-07-06
AAR547 - 5 2026-07-05
AAR542 Asiana Airlines 5 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAR762 - Jul 14, 17:10 UTCJul 14, 22:15 UTC5h 5m
2026-07-14 AAR761 - Jul 14, 12:30 UTCJul 14, 12:50 UTC20m
2026-07-14 AAR761 - Jul 14, 06:35 UTCJul 14, 11:10 UTC4h 35m
2026-07-14 AAR522 - Jul 14, 03:50 UTCJul 14, 04:15 UTC25m
2026-07-13 AAR522 - Jul 13, 16:40 UTCJul 14, 03:05 UTC10h 25m
2026-07-13 AAR521 - Jul 13, 00:45 UTCJul 13, 13:10 UTC12h 25m
2026-07-12 AAR521 - Jul 12, 23:35 UTCJul 12, 23:55 UTC20m
2026-07-12 AAR512 - Jul 12, 06:35 UTCJul 12, 06:55 UTC20m
2026-07-11 AAR512 - Jul 11, 19:45 UTCJul 12, 05:45 UTC10h 0m
2026-07-11 AAR511 - Jul 11, 04:35 UTCJul 11, 17:00 UTC12h 25m
2026-07-11 AAR511 - Jul 11, 03:30 UTCJul 11, 03:45 UTC15m
2026-07-10 AAR734 - Jul 10, 20:10 UTCJul 10, 21:00 UTC50m
2026-07-10 AAR734 - Jul 10, 17:05 UTCJul 10, 17:15 UTC10m
2026-07-10 AAR733 - Jul 10, 11:00 UTCJul 10, 11:40 UTC40m
2026-07-10 AAR562 - Jul 10, 05:40 UTCJul 10, 06:05 UTC25m
2026-07-09 AAR562 - Jul 9, 19:50 UTCJul 10, 04:45 UTC8h 55m
2026-07-09 AAR561 - Jul 9, 06:10 UTCJul 9, 17:35 UTC11h 25m
2026-07-09 AAR561 - Jul 9, 05:00 UTCJul 9, 05:20 UTC20m
2026-07-08 AAR762 - Jul 8, 16:45 UTCJul 8, 21:50 UTC5h 5m
2026-07-08 AAR761 - Jul 8, 12:50 UTCJul 8, 13:10 UTC20m
2026-07-08 AAR761 - Jul 8, 06:30 UTCJul 8, 11:20 UTC4h 50m
2026-07-08 AAR522 - Jul 8, 02:45 UTCJul 8, 03:10 UTC25m
2026-07-07 AAR522 - Jul 7, 15:55 UTCJul 8, 02:00 UTC10h 5m
2026-07-06 AAR521 ICN → LHR Jul 6, 23:35 UTCJul 7, 13:25 UTC13h 50m
2026-07-06 AAR548 - Jul 6, 04:00 UTCJul 6, 04:25 UTC25m
2026-07-05 AAR548 - Jul 5, 18:20 UTCJul 6, 03:05 UTC8h 45m
2026-07-05 AAR547 ICN → BUD Jul 5, 04:20 UTCJul 5, 16:10 UTC11h 50m
2026-07-04 AAR562 FCO → ICN Jul 4, 07:45 UTCJul 4, 08:10 UTC25m
2026-07-03 AAR562 FCO → ICN Jul 3, 21:45 UTCJul 4, 07:05 UTC9h 20m
2026-07-03 AAR561 - Jul 3, 08:30 UTCJul 3, 19:35 UTC11h 5m
2026-07-03 AAR561 - Jul 3, 07:20 UTCJul 3, 07:35 UTC15m
2026-07-02 AAR752 SIN → ICN Jul 2, 18:10 UTCJul 2, 21:10 UTC3h 0m
2026-07-02 AAR751 - Jul 2, 13:05 UTCJul 2, 13:20 UTC15m
2026-07-02 AAR751 - Jul 2, 07:40 UTCJul 2, 10:30 UTC2h 50m
2026-07-02 AAR502 - Jul 2, 05:00 UTCJul 2, 05:25 UTC25m
2026-07-01 AAR502 - Jul 1, 17:40 UTCJul 1, 22:05 UTC4h 25m
2026-07-01 AAR501 ICN → CDG Jul 1, 01:30 UTCJul 1, 14:45 UTC13h 15m
2026-06-29 AAR201 LAX → ICN Jun 29, 17:34 UTCJun 30, 06:15 UTC12h 41m
2026-06-29 AAR202 ICN → LAX Jun 29, 04:20 UTCJun 29, 14:34 UTC10h 15m
2026-06-28 AAR734 - Jun 28, 18:59 UTCJun 28, 22:34 UTC3h 35m
2026-06-28 AAR733 - Jun 28, 11:00 UTCJun 28, 15:40 UTC4h 40m
2026-06-27 AAR512 BCN → ICN Jun 27, 19:19 UTCJun 28, 06:55 UTC11h 35m
2026-06-27 AAR511 - Jun 27, 04:24 UTCJun 27, 16:39 UTC12h 15m
2026-06-27 AAR511 - Jun 27, 03:15 UTCJun 27, 03:30 UTC15m
2026-06-26 AAR211 - Jun 26, 06:54 UTCJun 26, 19:00 UTC12h 5m
2026-06-25 AAR212 ICN → SFO Jun 25, 12:54 UTCJun 25, 22:24 UTC9h 30m
2026-06-25 AAR522 - Jun 25, 03:15 UTCJun 25, 03:59 UTC45m
2026-06-24 AAR522 - Jun 24, 16:09 UTCJun 25, 02:25 UTC10h 15m
2026-06-23 AAR521 ICN → LHR Jun 23, 23:19 UTCJun 24, 13:10 UTC13h 50m
2026-06-23 AAR211 - Jun 23, 07:09 UTCJun 23, 18:34 UTC11h 25m

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 HL7579 page for operator, model, and routing details .

Mode-S 71BD79 frequently asked

What is Mode-S code 71BD79?
71BD79 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7579.
Where is Mode-S 71BD79 registered?
Mode-S code 71BD79 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 71BD79 broadcasting right now?
No active broadcast right now. Last signal was 38m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BD79, octal 34336571, decimal 7,454,073.
What flights does 71BD79 operate?
Mode-S 71BD79 has broadcast 20 distinct callsigns, including AAR511, AAR522, AAR512, AAR502, AAR212.