Apparatus

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sensors Mode-S transponder

71BF75

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

Currently assigned to HL7775 · BOEING 777-200

Hex
71BF75
Octal
34337565
Decimal
7,454,581
Country
KR
Tail
HL7775
Type
B772
Broadcasting now · callsign AAR133 · 1,200 ft
Flights observed
238
Distinct callsigns
20
Country
KR
Last broadcast
Jul 26, 13:00 UTC

Current position

71BF75 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 71BF75 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
AAR602 Asiana Airlines 23 2026-07-26
AAR601 Asiana Airlines 23 2026-07-25
AAR232 Asiana Airlines 20 2026-06-20
AAR272 Asiana Airlines 17 2026-07-24
AAR271 Asiana Airlines 17 2026-07-25
AAR231 - 15 2026-06-20
AAR562 Asiana Airlines 14 2026-06-12
AAR561 Asiana Airlines 14 2026-06-11
AAR730 - 12 2026-07-19
AAR729 Asiana Airlines 12 2026-07-19
AAR551 - 12 2026-07-16
AAR552 - 11 2026-07-16
AAR334 Asiana Airlines 5 2026-05-27
AAR711 - 4 2026-07-23
AAR360 - 4 2026-07-09
AAR712 Asiana Airlines 3 2026-07-23
AAR704 - 3 2026-07-04
AAR703 - 3 2026-07-04
AAR359 - 3 2026-07-17
AAR333 Asiana Airlines 3 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAR602 SYD → ICN Jul 26, 11:55 UTCJul 26, 13:00 UTC1h 5m
2026-07-25 AAR601 ICN → SYD Jul 25, 23:25 UTCJul 26, 09:05 UTC9h 41m
2026-07-25 AAR271 SEA → ICN Jul 25, 07:30 UTCJul 25, 18:30 UTC11h 0m
2026-07-24 AAR272 ICN → SEA Jul 24, 12:55 UTCJul 24, 23:00 UTC10h 5m
2026-07-24 AAR101 NRT → ICN Jul 24, 04:15 UTCJul 24, 06:10 UTC1h 55m
2026-07-23 AAR102 ICN → NRT Jul 23, 23:45 UTCJul 24, 01:35 UTC1h 50m
2026-07-23 AAR712 TPE → ICN Jul 23, 04:40 UTCJul 23, 06:50 UTC2h 10m
2026-07-23 AAR711 - Jul 23, 01:45 UTCJul 23, 02:00 UTC15m
2026-07-23 AAR711 - Jul 23, 00:00 UTCJul 23, 00:35 UTC35m
2026-07-21 AAR602 SYD → ICN Jul 21, 12:55 UTCJul 21, 21:35 UTC8h 40m
2026-07-21 AAR602 SYD → ICN Jul 21, 11:15 UTCJul 21, 12:10 UTC55m
2026-07-20 AAR601 ICN → SYD Jul 20, 23:25 UTCJul 21, 09:25 UTC9h 59m
2026-07-20 AAR271 SEA → ICN Jul 20, 07:25 UTCJul 20, 18:20 UTC10h 55m
2026-07-19 AAR272 ICN → SEA Jul 19, 13:45 UTCJul 19, 23:50 UTC10h 5m
2026-07-19 AAR730 - Jul 19, 11:15 UTCJul 19, 11:55 UTC40m
2026-07-19 AAR729 PUS → SGN Jul 19, 04:10 UTCJul 19, 04:20 UTC10m
2026-07-19 AAR729 PUS → SGN Jul 19, 00:50 UTCJul 19, 01:30 UTC40m
2026-07-18 AAR271 SEA → ICN Jul 18, 07:30 UTCJul 18, 18:20 UTC10h 50m
2026-07-17 AAR272 ICN → SEA Jul 17, 12:55 UTCJul 17, 22:49 UTC9h 55m
2026-07-17 AAR359 ICN → ICN Jul 17, 03:59 UTCJul 17, 09:35 UTC5h 35m
2026-07-16 AAR552 - Jul 16, 15:14 UTCJul 17, 00:04 UTC8h 50m
2026-07-16 AAR551 - Jul 16, 03:15 UTCJul 16, 12:55 UTC9h 40m
2026-07-16 AAR551 - Jul 16, 01:55 UTCJul 16, 02:20 UTC25m
2026-07-15 AAR271 SEA → ICN Jul 15, 07:30 UTCJul 15, 18:05 UTC10h 35m
2026-07-14 AAR272 ICN → SEA Jul 14, 12:45 UTCJul 14, 22:55 UTC10h 9m
2026-07-14 AAR730 - Jul 14, 10:00 UTCJul 14, 10:45 UTC45m
2026-07-14 AAR730 - Jul 14, 06:50 UTCJul 14, 07:00 UTC10m
2026-07-14 AAR729 - Jul 14, 00:45 UTCJul 14, 01:25 UTC40m
2026-07-13 AAR602 SYD → ICN Jul 13, 12:30 UTCJul 13, 22:40 UTC10h 10m
2026-07-13 AAR601 - Jul 13, 01:01 UTCJul 13, 10:45 UTC9h 45m
2026-07-12 AAR730 - Jul 12, 10:05 UTCJul 12, 10:25 UTC20m
2026-07-12 AAR730 - Jul 12, 06:40 UTCJul 12, 06:50 UTC10m
2026-07-12 AAR729 - Jul 12, 00:45 UTCJul 12, 01:05 UTC20m
2026-07-11 AAR602 SYD → ICN Jul 11, 11:15 UTCJul 11, 21:30 UTC10h 15m
2026-07-10 AAR601 ICN → SYD Jul 10, 23:20 UTCJul 11, 09:10 UTC9h 50m
2026-07-10 AAR271 SEA → ICN Jul 10, 07:35 UTCJul 10, 18:20 UTC10h 45m
2026-07-09 AAR272 - Jul 9, 13:20 UTCJul 9, 23:05 UTC9h 45m
2026-07-09 AAR360 ICN → ICN Jul 9, 04:00 UTCJul 9, 09:15 UTC5h 15m
2026-07-08 AAR712 TPE → ICN Jul 8, 04:35 UTCJul 8, 06:45 UTC2h 10m
2026-07-08 AAR711 ICN → TPE Jul 8, 00:05 UTCJul 8, 02:05 UTC2h 0m
2026-07-07 AAR271 SEA → ICN Jul 7, 07:30 UTCJul 7, 18:10 UTC10h 40m
2026-07-06 AAR272 ICN → SEA Jul 6, 12:50 UTCJul 6, 22:20 UTC9h 30m
2026-07-06 AAR360 - Jul 6, 04:15 UTCJul 6, 09:30 UTC5h 15m
2026-07-05 AAR730 - Jul 5, 10:00 UTCJul 5, 10:40 UTC40m
2026-07-05 AAR729 - Jul 5, 01:15 UTCJul 5, 04:05 UTC2h 50m
2026-07-04 AAR704 - Jul 4, 16:15 UTCJul 4, 19:40 UTC3h 25m
2026-07-04 AAR703 - Jul 4, 11:00 UTCJul 4, 14:35 UTC3h 35m
2026-07-04 AAR370 - Jul 4, 00:00 UTCJul 4, 08:40 UTC8h 40m
2026-07-03 AAR271 SEA → ICN Jul 3, 07:20 UTCJul 3, 19:05 UTC11h 45m
2026-07-02 AAR272 ICN → SEA Jul 2, 12:45 UTCJul 2, 21:50 UTC9h 5m

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 HL7775 page for operator, model, and routing details .

Mode-S 71BF75 frequently asked

What is Mode-S code 71BF75?
71BF75 is an ICAO 24-bit transponder address. Allocated to Korea, South. Assigned to HL7775.
Where is Mode-S 71BF75 registered?
Mode-S code 71BF75 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 71BF75 broadcasting right now?
Yes. Mode-S 71BF75 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 71BF75, octal 34337565, decimal 7,454,581.
What flights does 71BF75 operate?
Mode-S 71BF75 has broadcast 20 distinct callsigns, including AAR602, AAR601, AAR232, AAR272, AAR271.